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  • Professor Shelly Kagan: At the end of last class,

  • I began to raise the question as to whether or not we should

  • distinguish two questions that we would normally be inclined to

  • run together. We've been asking ourselves,

  • what does it take for me to survive, for me to continue to

  • exist? But it's possible,

  • I suggested, that we really shouldn't focus

  • on the question, what does it take for me to

  • survive? but rather, what is it that I

  • care about? What is it that matters

  • in survival?" Because it's possible,

  • logically speaking, that there could be cases in

  • which I survive, but I don't have what I

  • normally have when I survive, and so I don't have what

  • matters. I don't have what I wanted,

  • when I wanted to survive. It could be that in the typical

  • cases of survival I've got that extra thing.

  • But we can think of cases in which I would survive,

  • but I don't have that extra thing, and so I wouldn't have

  • everything that matters to me. So as it were,

  • we might say, it might be that mere survival

  • or bare bones survival doesn't really give me what matters.

  • What I want is survival plus something else.

  • And I tried to motivate this question by having you think

  • about perhaps the possibility, if the soul view was the truth

  • about personal identity, but imagine a case of complete

  • irreversible amnesia, while nonetheless,

  • it's still your soul continuing.

  • But the soul is going to then, having been scrubbed clean,

  • get a brand new personality. A new set of memories,

  • new set of desires, new set of beliefs.

  • No chance of recalling your previous, current,

  • personality. And when I think about that

  • case, I find myself wanting to say, all right,

  • I'll survive, but so what?

  • I don't care. It doesn't matter that it's me,

  • in that case. Because I don't just want it to

  • be me, I want to have there be somebody that's me with my

  • personality. Similarly, suppose we thought

  • that the body view was the correct view and we imagine,

  • again, some sort of case of complete amnesia.

  • And so then we get a new personality and you say,

  • "Oh look, that's going to be you, your body,

  • your brain. You're still around."

  • And I say, "It could be true, but so what?"

  • It doesn't give me what I want, when I want to survive.

  • What I want isn't just for it to be me.

  • I want it to be me with my personality.

  • So should we conclude, therefore, that what really

  • matters is not just survival but having the same personality?

  • Would that--Suppose the personality view of personality

  • identity was correct. Would that then give us not

  • just personal survival, but what matters?

  • I think that's close, but no cigar.

  • Not quite good enough. To see that,

  • recall the fact that according to the personality view,

  • as a theory of personality identity,

  • the crucial point isn't that my personality stay identical.

  • It's not that I have to keep all exactly the very same

  • beliefs, desires, and memories.

  • Because of course, if we said that,

  • then I'd die as soon as I got a new belief.

  • I'd die as soon as I forgot anything at all of what I was

  • doing 20 minutes ago. No, according to the

  • personality theory, what personal identity requires

  • isn't item-for-item the same personality,

  • but rather the same evolving personality.

  • I gain new beliefs, new desires,

  • new goals. I may lose some of my previous

  • beliefs, lose some of my previous memories,

  • but that's okay as long as it's a slowly-evolving personality

  • with enough overlap. Okay, so now let's consider the

  • following case. I start off.

  • Here I am. I've got a set of beliefs,

  • a set of--I believe I'm Shelly Kagan, a set of memories about

  • growing up in Chicago. I have a certain set of desires

  • about wanting to finish my book in philosophy and so forth.

  • And I get older and older and older.

  • And I get some new memories and some new desires and some new

  • goals. Suppose that I get very,

  • very, very old. I get 100 years old,

  • 200 years old, 300 years old.

  • Somewhere around 200, suppose that my friends give me

  • a nickname. They call me Jo-Jo.

  • Who knows why, they call me Jo-Jo.

  • And after a while, somewhere the name spreads and

  • by the time I'm 250 years old, everybody's calling me Jo-Jo.

  • Nobody calls me Shelly anymore. And by the time I'm 300,350,

  • 400, I've forgotten anybody used to call me Jo-Jo .

  • And I no longer remember growing up in Chicago.

  • I remember things about my youth when I was a lad of 100.

  • But I can't go back to what it was like in the early days,

  • just like you can't go back to what it was like to be four or

  • three. And suppose that all this is

  • going on as I'm getting older and older.

  • My personality is changing in a variety of other ways.

  • I lose my interest in philosophy and take up an

  • interest in, I don't know, something that completely

  • doesn't--organic chemistry holds no interest to me whatsoever.

  • I become fascinated by the details of organic chemistry.

  • And my values change. Now I'm a kind--now,

  • over here--I'm a kind, compassionate,

  • warm individual who cares about the downtrodden.

  • But around 300, I say, "The downtrodden.

  • Who needs them?" And by the time I'm 500,

  • I become completely self-absorbed and I'm sort of a

  • vicious, cruel, vile person.

  • Here I am, 800 years old, 900 years old.

  • Methuselah, in the Bible, lives for 969 years.

  • He's the oldest person. So okay, here I am,

  • 969 years old. I'm like Methuselah.

  • Call this the Methuselah case. And the crucial point about the

  • case is that we stipulate that at no point was there a dramatic

  • change. It was all gradual,

  • slow, evolving. In just the way it happens in

  • real life. It's just that as Methuselah,

  • I live a very, very, very long time.

  • And by the end of it, and indeed, let's say somewhere

  • around 600 or 700, I'm a completely different

  • person, as we might put it. I don't mean literally.

  • I mean in terms of my personality.

  • Now, remember, according to the personality

  • theory of personal identity, what makes it me is the fact

  • that it's the same evolving personality.

  • And I stipulated that it is the same evolving personality.

  • So that's still me that's going to be around 600 years from now,

  • 700 years from now. But when I think about that

  • case, I say, "So what? Who cares?"

  • When I think about that case, I say, "True,

  • we'll just stipulate that will be me in 700 years.

  • But it doesn't give me what I want.

  • That person is so completely unlike me.

  • He doesn't remember being Shelly Kagan.

  • He doesn't remember growing up in Chicago.

  • He doesn't remember my family. He has completely different

  • interests and tastes and values."

  • I say "It's me, but so what? It doesn't give me what I want.

  • It doesn't give me what matters."

  • When I think about what I want, it's not just that there be

  • somebody at the tail end of an evolving personality.

  • I want that person to be like me,

  • not just be me. I want that person to be like

  • me. And in the Methuselah case,

  • I've stipulated, it ends up not being very much

  • like me at all. So it doesn't give me what I

  • want. When I think about what I

  • want--and I'm just going to invite you to,

  • each one of you, to ask yourself what is it that

  • you want, what matters to you in survival?--when I think about

  • what matters to me, it's not just survival.

  • It's not just survival as part of the same ongoing personality.

  • It's survival with a similar personality.

  • Not identical, item for item,

  • but close enough to be fairly similar to me.

  • Give me that, and I've got what matters.

  • Don't give me that, and I don't have what mattes.

  • In fact, I'm inclined to go a little bit further.

  • Once you give me that, give me that there's somebody

  • there with my similar personality, I think that may be

  • all that matters. Up to this moment,

  • I've been saying, okay, survival by itself isn't

  • good enough. You need survival plus

  • something else. And I'm now suggesting that in

  • my own case at least, the something else is,

  • something extra, is same, similar personality.

  • It might be that I get what matters to me even if I have,

  • as long as I have, similar personality,

  • even if I don't have survival.

  • Suppose--I don't believe in souls, but suppose there really

  • are souls. And suppose the soul is the key

  • to personal identity. And suppose the thing that

  • Locke was worried about really does happen.

  • Every day at midnight God destroys the old soul and

  • replaces it with a new soul that has the very same personality as

  • the one before midnight, similar personality,

  • same beliefs, desires, and so forth and so

  • on. If I were to discover that's

  • what was happening metaphysically and the soul view

  • was the true theory of personal identity, I'd say,

  • "Huh! Turns out I'm not going to

  • survive tonight. I'm going to die.

  • Who cares? There'll be somebody around

  • tomorrow with my beliefs, my desires, my goals,

  • my ambitions, my fears, my values.

  • Good enough. I don't really care whether I'm

  • going to survive. What I care about is whether

  • there'll be somebody that's similar to me in the right way

  • in terms of my personality." So it might be that the whole

  • question we've been focusing on, "What does it take to survive?"

  • may have turned out to be misguided.

  • The real question may not be "What does it take to survive?"

  • but "What matters?" And it might turn out that

  • although, normally, having what matters goes hand

  • in hand with surviving, logically speaking,

  • they can come apart. And what matters,

  • or so it seems to me, at least, isn't survival per

  • se, but rather having the same personality.

  • Since I'm inclined to think that the body view is the

  • correct theory of personal identity,

  • I want to say, look, somebody around tomorrow,

  • if overnight God replaces my body with some identical looking

  • body and keeps the personality the same,

  • that won't be me, but all right. It's good enough.

  • What matters to me isn't survival per se.

  • Indeed, isn't survival, strictly, at all.

  • It's having the same personality.

  • Still, what does that leave us? That leaves us with the

  • possibility that there could be cases where you die and you

  • don't survive. Maybe God swoops me up upon

  • death. My body dies,

  • but he sort of swoops up my information about my personality

  • and recreates somebody up in heaven with that similar

  • personality. It won't be me,

  • if it's a different soul. It won't be me,

  • if it's a different body. But still, I want to say,

  • it will give me what matters!" That's a possibility.

  • But I don't, in fact, think it's going to

  • happen. I believe--I've told you I'm a

  • physicalist--I believe that what's going to happen is,

  • at the death of my body, that's going to be the end.

  • Now, what I've been arguing is that, logically speaking,

  • even if you are a physicalist, that doesn't rule out the

  • possibility of survival. Suppose you believe in the

  • personality theory. Your body's going to die,

  • but your personality could continue.

  • Or it might be, even as a body theorist,

  • I'll cease to exist but what matters will continue.

  • These are possibilities. But for what it's worth,

  • I don't in fact believe they're actually what's going to happen.

  • Of course, these are also theological matters,

  • and so I'm not trying to say anything here today to argue you

  • out of the theological conviction that God will

  • resurrect the body or God will transplant your personality into

  • some new angel body, but if you believe in the

  • personality theory, that will be you,

  • or what have you. I'm not--it's not my goal here

  • to argue for or against these theological possibilities,

  • having at least taken the time to explain philosophically how

  • we could make sense of them. But I do want to report that I

  • don't believe them. I believe that when my body

  • dies, that's it for me. There won't be anything that's

  • me afterwards. There won't be anything

  • that's--even though what I want per se isn't survival.

  • Not only won't I survive, I believe after my death what

  • matters to me in that situation won't continue either.

  • There won't be somebody with a similar personality to mine

  • after the death of my body. All right, so having spent all

  • this time getting clearer about the nature of personal identity,

  • and getting clearer about what people are, and the

  • possibilities of survival, and so forth,

  • having argued against the existence of souls,

  • and for a physicalist view--physicalism seems

  • compatible with both the body view and the personality view,

  • leave it to you to decide between them,

  • I myself currently favor the body view--let's ask,

  • "So just what is death, anyway, on the physicalist

  • view?" It might seem as though it's

  • fairly straightforward. A person, after all,

  • is just a body that's functioning in the right way so

  • as to do these person tricks. It's P-functioning,

  • as we've put it at one time or another.

  • And so a person is just a P-functioning body,

  • whether you emphasize the body side there or the personality

  • side of that equation. What exactly is it to die?

  • When do I die? Let's turn to that question.

  • When do I die and what is death? Roughly speaking,

  • the answer, presumably, on the physicalist view,

  • is going to be something like--if I'm alive when we've

  • got a P-functioning body, roughly speaking,

  • I die when that stops happening, when the body breaks

  • and it stops functioning properly.

  • That seems, more or less, the right answer from the

  • physicalist point of view, although as we'll see probably

  • later today, we need to refine it somewhat.

  • But first, let's ask a slightly different question.

  • Which functions are crucial in defining the moment of death?

  • After all, we've got the idea that here's the body,

  • here's a functioning body. Here's one in front of you.

  • Each one of you has got one. You're a functioning body.

  • There's a variety of functions that your body's engaged in.

  • Some of them have to do with merely digesting food and moving

  • the body around, and making the heart beat,

  • and the lungs open and close. Call those things the bodily

  • functions. And there's also,

  • of course, in each one of our cases, there's these higher

  • mental cognitive functions that I've been calling the person

  • functioning, there's the B-functions and

  • there's the P-functions. Well, roughly speaking,

  • I die when the functioning stops, but which functions?

  • Is it the body functions or the personality functions?

  • So let's take a look at the normal situation.

  • Here's the existence of your body.

  • And during most of the existence of your body,

  • it's functioning.

  • The body functions.

  • Over here, it's no longer functioning.

  • It's a corpse.

  • During some of the period when your body's functioning,

  • it's doing the higher cognitive stuff.

  • The personality functions.

  • Now, this is the very early stuff when your body's still

  • developing and your brain hasn't turned on yet,

  • or your brain is turned on, but it hasn't actually become a

  • person yet, right? At least in the case of the

  • fetus, it's not self-conscious. It's not rational.

  • It's not able to communicate. It's not creative and so forth.

  • That comes later. All right, so there's Phase A.

  • There's Phase B. There's Phase C.

  • That's the normal situation, the normal case.

  • The body exists. It functions for a while before

  • the P-functioning begins. And then after a while the body

  • and P-functioning are both going on.

  • And then after a while they stop.

  • In the normal case, I'm in a car accident or

  • whatever it is, and my body stops functioning,

  • my personality stops functioning, and you're left

  • with a corpse. When did I die?

  • Well, the natural suggestion is to say I died here.

  • I'll draw my little star, an asterisk.

  • In the normal case, I die when my body stops

  • functioning, in terms of the body functions.

  • And it stops functioning in terms of the personality

  • functions.

  • That's the normal case. But we could still ask the

  • philosophical question. Since what we had here was

  • simultaneously losing both the ordinary body functioning and

  • the special personality functioning,

  • which loss was the crucial one in terms of defining the moment

  • of my death? Let's come back to that

  • question in a minute. First, I want to ask a slightly

  • different question. When did I cease to exist?

  • Or, to put it slightly differently, do I exist during

  • Phase C, when the body has stopped functioning?

  • Both in terms of body functions and personality functions,

  • I'm just a corpse. Do I exist?

  • Now, let's suppose we believe the personality theory of

  • personal identity. According to the personality

  • theory of personal identity, for something to be me,

  • it's got to have the very same personality, the same evolving,

  • but still the same set of beliefs,

  • desires, goals, so forth. Now, during period C,

  • there's nothing with my personality, right?

  • Nobody thinks they're Shelly Kagan.

  • Nobody has my memories, beliefs, exact desires,

  • goals and so forth. Pretty clearly then,

  • on the personality theory, I don't exist at Phase C.

  • That's why it's natural to point to the moment of star when

  • we say that's when my death occurs.

  • I don't exist at Phase C. But interestingly,

  • things look rather different if we accept not the personality

  • theory, but instead, the body theory.

  • After all, according to the body theory of personal

  • identity, for somebody to be me, they've got to have my body.

  • Follow the body. Same body, same person.

  • All right, here we are. Here's my corpse.

  • What is a corpse? It's a body,

  • and indeed, my corpse is my body.

  • So follow the body means follow the person.

  • The corpse is still around. It means my body's still around.

  • It means I'm still around.

  • It's like, I mean, I'm dead, but I still exist.

  • It's like a bad joke, right? So here's the question we

  • started the class off with. Will you survive your death?

  • Will you still exist after death?

  • Well, there's good news and there's bad news.

  • Since I believe in the body theory, the good news is,

  • you will exist after your death.

  • The bad news is, you'll be a corpse.

  • That seems like a bad joke, but if the body theory is

  • right, it's not a joke at all. It's literally speaking the

  • truth. I will exist,

  • at least for a while. Eventually, the body will

  • decay, turn into atoms or whatever it is,

  • decompose. At that point my body no longer

  • exists. At that point,

  • I will no longer exist. But at least for a while,during

  • period C, the body theorist should say, "Yeah,

  • you will exist. You will exist,

  • but you won't be alive." It just reinforces the point

  • that I was trying to make a few moments ago that the crucial

  • question is not survival per se. The crucial question is,

  • what did you want out of survival?

  • And one of the things I wanted out of survival was to be

  • alive. All right, so on the body view,

  • I exist here, but I'm not alive,

  • so it doesn't give me what matters.

  • On the personality view, I don't exist when I'm a

  • corpse. Let's go back and ask the

  • question, well, so which is it?

  • Which is the one that's the crucial for defining the moment

  • of death, right? Even on the body view,

  • the fact that I exist isn't good enough, because I'm not

  • alive. I want to know, when am I alive?

  • When am I dead? So what's crucial for defining

  • the moment of death? Is it body functioning or

  • personality functioning? Well, you can't tell by

  • thinking about the normal case, because the

  • B-functioning and the P-functioning stop at the

  • same time. But suppose we draw the

  • abnormal case.

  • All right, here's C with the corpse again.

  • Here's a period when the body's been functioning and goes like

  • this. Here's the period back here,

  • A, where the body's been functioning, but the personality

  • hasn't started yet. And now imagine,

  • so this is personality.

  • Over here we've got body. We'll call this B again.

  • What I've done is imagine a case in which the personality

  • functioning stops before the rest of the body functioning

  • stops. Obviously, the phases are no

  • longer in alphabetical order, but I introduced D in the

  • middle so the other phases could keep their same labels.

  • Well, here's a case where--When does the body functioning stop?

  • End of D. When does the personality

  • functioning stop? End of B.

  • So we've got two candidates. Star one and star two.

  • Star one says death occurs when personality stops functioning.

  • Star two says no, no, death occurs when bodily

  • functioning stops. Well, again,

  • the question is, what should we say?

  • I think we're going to perhaps be drawn to different answers,

  • depending on whether we accept the body view or the personality

  • view. Suppose we accept the body view.

  • Well, look, if the relevant question is "When do I die?"

  • and I am a body, then presumably the

  • straightforward answer at least is going to be "I die when my

  • body stops functioning." When is that?

  • Star two. During period D,

  • I'm still alive, but I'm no longer functioning

  • as a person. I am no longer a person.

  • That's interesting. It's not just that I

  • exist. In C, I can exist without being

  • a corpse; or rather, without being alive,

  • as a corpse. In D, I'm alive but I'm not a

  • person. You recall when we talked about

  • Plato, we introduced the notion of essential properties.

  • And it seems that if we accept the body view,

  • we have to say being a person is not an essential property of

  • being something like me. It's not one of my essential

  • properties that I'm a person. I am, in fact,

  • a person, but that won't always be true of me.

  • When I'm a corpse, I will cease to be a person,

  • but I'll still exist. And if we have this unusual

  • case in which my brain has a stroke, loses its higher

  • cognitive functioning, so that the body continues to

  • breathe, eat, respirate, and so forth,

  • the heart continues to pump, but there's no longer anything

  • capable of thinking, reasoning, we say,

  • look, I still exist.

  • Indeed, I'm alive, but I'm not a person.

  • Being a person is something you can go through for a period of

  • time and cease to be. In the same way that being a

  • child is a phase you can go through for a period of time and

  • then cease to be. Or being a professor is a phase

  • you can go through and then cease to be.

  • You can still exist without being a professor.

  • I can still be alive without being a professor.

  • Well, on the body view, we have to say the same thing

  • about being a person. Being a person is something

  • that I, namely my body, can do for a while.

  • It wasn't doing it back here in A.

  • It certainly won't be doing it in C.

  • And it won't be doing it in D either.

  • Being a person is something on the body view that I am only for

  • part of my existence and indeed, only for part of my life.

  • Well, that's what it seems we should say on the body view.

  • What if instead we accept the personality theory?

  • Then--actually, one more remark about the body

  • view. Notice that if you accept this

  • account of what the body view should say about when death is,

  • my death is when I cease to be alive.

  • I am my body. So my death occurs at star two,

  • loss of bodily function. And being a person is just a

  • phase. Notice that if we say that,

  • then there's something somewhat misleading about the standard

  • philosophical label for the problems we've been thinking

  • about for the last couple of weeks.

  • We've been worrying about the nature of personal identity.

  • That is to say, what is it for somebody to be

  • me. But notice that that label,

  • "personal identity," "the problem of personal identity,"

  • seems to have built into it the assumption that whatever it is

  • that's me is going to be a person.

  • Is it the same person or not?

  • Now, it turns out that that assumption, standardly built

  • into the usual label, may be false.

  • On the body view, it could still be me without

  • being a person at all. So the problem of existence

  • through time, or persistence through time,

  • shouldn't be called the problem of personal identity,

  • but just the problem of identity.

  • You know, a footnote. Turning now again to the

  • personality theory. If we accept the personality

  • theory of personal identity, then for someone to be me,

  • they've got to have the same personality.

  • And so for something, for me to exist,

  • my personality has to be around.

  • Well, that's why we said up here that in Phase C when

  • there's a corpse, I don't exist.

  • There's nothing with my personality.

  • As a corpse, I no longer exist. What should we say about Phase

  • D, on the personality theory? Here, my body is functioning,

  • but my personality has been destroyed.

  • Nothing exists with my beliefs, memories, desires,

  • fears, values, goals, ambitions.

  • Well, if I just am my personality, then I don't exist

  • in Phase D, because there's nothing there to be me,

  • nothing with my personality. According to the personality

  • theory, follow the personality. The personality ended at star

  • one. So I don't exist at Phase D on

  • the personality theory. Okay good.

  • I don't exist. But what should we say?

  • Am I alive or not? Well, my body's still alive.

  • So should we say that I'm alive?

  • After all, my body's still functioning until star two.

  • During Phase D, my body seems to still be

  • alive. Should we say that I'm

  • alive? That's rather hard to believe,

  • right? Think about what it would mean

  • to say that. We'd being saying on the

  • personality theory, I don't exist,

  • but I'm alive. That seems like a very

  • unpalatable combination of views.

  • How can I be alive if I don't even exist?

  • So it seems we have to say I'm not alive during Phase D.

  • Not only don't I exist during Phase D, I'm not alive either.

  • Yet, my body is alive; that's the whole stipulation.

  • So it looks as though the personality theorist is going to

  • have to introduce a distinction between my being alive,

  • on the one hand, and my body being alive,

  • on the other. In the normal case--up at the

  • top, those two deaths occur simultaneously.

  • My body stops being alive at the very same moment that I

  • cease being alive. But in the abnormal case,

  • the personality theorist needs to say, or so it seems to me,

  • the two deaths come apart. The death of my body occurs at

  • star two. My death occurs at star one.

  • Notice that the body theorist didn't need to draw that

  • distinction. Because if I just am my body,

  • then well, I'm just my body. My death occurs at the death of

  • my body. But still, even the body

  • theorist needs a different distinction.

  • We already learned, by thinking about the corpse

  • case, that existence wasn't good enough for the body theorist.

  • He wanted to be alive. And when I think about Phase D,

  • I want to say something more. It's not good enough that I'm

  • alive. I want to be a person.

  • So what matters to me isn't just being alive,

  • but being back here during Phase B.

  • So then it needs something like the same distinction.

  • Not, my death versus my body's death, but perhaps the death of

  • the person, if we could talk that way, versus the death of

  • the body. My death, for the body view,

  • occurs with the death of my body.

  • But in terms of what matters, it's the death of the person

  • and that's star one, not star two.

  • Now, I want to take just a couple of minutes and mention

  • some other puzzles, or at least questions,

  • worth thinking about in terms of the physicalist picture.

  • I'm only going to point to them, rather than explore them.

  • But I've been focused on the question about the end of life.

  • We might ask as well, what about the beginning?

  • What should we say about Phase A, when the body is turned on

  • and functioning, developing, but the brain has

  • not yet gotten to the stage at which it's turned on,

  • or perhaps it hasn't yet become, well,

  • it's not doing person functioning.

  • It's not reasoning. It's not communicating.

  • It's not thinking. It's not aware.

  • It's not conscious. There's going to be some Phase

  • A like that. What should we say about that

  • phase? Do I exist during that phase or

  • don't I?

  • Well, on the body view, I suppose we should say I do

  • exist. Being a person is a phase.

  • We happen to have, in Phase A, the stage of my

  • existence before I become a person.

  • Of course, if we take the version of the body view that

  • what I am, essentially--the crucial body part--is my brain,

  • then we really would have to subdivide A into two parts:

  • early A and late A. In very, very early A,

  • the brain hasn't even developed yet.

  • It hasn't been constructed yet. If I just am my brain,

  • in effect, then early A, I don't exist yet.

  • Not until late A, when the brain gets put

  • together, that I start to exist. There is something there.

  • It's my body, but it's not me,

  • in early A. It seems sort of hard to

  • believe, but maybe that's the right thing to say.

  • In any event, the fans of the personality

  • theory shouldn't be laughing too hard, because they're going to

  • have to say something similar. Remember, if you accept the

  • personality theory, follow the personality.

  • Don't got the same personality? I cease to exist.

  • That's why we said on the personality theory,

  • as we went ahead in time, once the P-functioning

  • stops, I don't exist anymore. That's what the personality

  • theorist said. But we can raise that same

  • point going backwards. When did I begin to exist on

  • the personality theory? Not until my continuing,

  • evolving through time personality started.

  • And that certainly wasn't true way back at the start of A,

  • as the fertilized egg first begins to split and multiply,

  • subdivide and make organs. It's a good long time till any

  • kind of mental processing occurs at all.

  • So on the personality theory, I did not exist when that

  • fertilized egg came into being, when the egg and the sperm

  • joined. That's still not me,

  • on the personality theory. Clearly, these issues are

  • relevant for thinking about the morality of abortion.

  • I'm not going to pursue them here, but you can see how they'd

  • be relevant. If we want to worry about when,

  • if ever, is an abortion justified, it might be worth

  • getting clear on, when do creatures like us

  • start? Interesting question,

  • but having noted it, let me put it aside.

  • Ah, question. Student: [inaudible]

  • Professor Shelly Kagan: The question was:

  • Would it be plausible to say that at the early phases of A,

  • strictly speaking, the body's not functioning,

  • because it's so utterly dependent on help from the

  • mother's body. It needs the mother for

  • respiration, for nutrients, and so forth and so on.

  • That's a great question. And it's the sort of question

  • and the reason why I said I wanted to glance in this

  • direction without really going there.

  • That's a nice example of it. We might wonder,

  • just when should we say the body functioning really does

  • start? How much independence does it

  • take? We could draw yet another

  • picture of a different way a life could come to an end.

  • Imagine a body towards the end of life, on life support

  • machinery. Do we want to say the body's

  • functioning or not functioning? Well, hard cases there.

  • So similarly, there's going to be hard cases

  • about the very, very early stages.

  • And although they're great questions and I'm happy to

  • discuss them with you further, I don't want to pursue them

  • here and now. I want to point to a different

  • question that--I think it's a crucially important question.

  • My unwillingness to discuss them isn't a matter of my

  • judgment that they're unimportant, just trying to keep

  • at least roughly on track. Come back to the end of life.

  • Think some more about Phase D and ask.

  • All right, so this is something that's--If the personality

  • function's been destroyed, can't be recovered,

  • can't be fixed, but the rest of the bodily

  • functioning is still going on. The heart's pumping,

  • the lungs are breathing and so forth.

  • The body's able to digest food. There we are in Phase D,

  • in something like, perhaps, persistent vegetative

  • state.

  • Now, imagine that we've got somebody who needs a heart

  • transplant or a kidney transplant, liver transplant.

  • And tissue compatibility tests reveal this body's compatible,

  • suitable donor.

  • Can we take it or not? Well, you might have thought we

  • answer that by asking "Am I still alive?"

  • Well, rip out the heart, it's going to kill me,

  • right? So if I'm still alive,

  • you can't do that sort of thing.

  • It's killing me. Well, if we take the

  • personality theory, we have to say,

  • my body's still alive, but I'm not still alive.

  • That's what we seem to want to say.

  • If I'm not still alive, all we'd be killing isn't me,

  • but my body. So now we have to ask,

  • who or what has the right to life?

  • Do I have the right to life, or does my body

  • have the right to life? Or we might say,

  • look, certainly I have a right to life.

  • But is it also true that in addition to me,

  • my body has a right to life? Is there something immoral

  • about removing the organs during Phase D when the person is dead

  • and the only thing that's still alive is the body?

  • Don't be too quick to assume the answer that's got to be

  • yeah, it's still wrong. After all, on the body view,

  • I still exist when I'm a corpse.

  • But of course, there's nothing wrong about

  • taking my heart, even though I still exist.

  • After all, I'm a corpse. Why not then say,

  • similarly, even though my body's still alive,

  • nothing wrong about removing the heart if the person is dead.

  • At least, the personality view opens the door to saying that.

  • What about the body view? On the body view,

  • of course, I just am my body. I'm still alive.

  • Now is it wrong? Well...

  • Just like, with the body view, we wanted to say,

  • "Being alive is not all it's cracked up to be,"

  • the real question is not, am I alive, on the body view?

  • An interesting question is, "Am I still a person?"

  • And indeed, although I'm alive on the body view,

  • I'm not still a person. Maybe it's not so much that I

  • have a right not to be killed.

  • Maybe I have a right not to be depersonified,

  • to have my personality destroyed.

  • If that's the real right, then again, there'd be nothing

  • wrong with removing the heart in D.

  • Well, again, clearly, very,

  • very important and very, very complicated questions.

  • But having gestured toward them, I want to put them aside.

  • Instead, I want to raise the following question.

  • So look, what I've just been talking about for the last half

  • hour or so is the fact that we've got to get clear,

  • in thinking about the nature of death, as to whether or not the

  • crucial moment is the moment when the personality functioning

  • stops or the moment when the bodily functioning stops.

  • As we saw by thinking about the abnormal case,

  • these things can come apart and we can have Phase D.

  • But in the normal case, they happen at the same moment.

  • And I've drawn a lot of different distinctions about

  • what would you say if you're a personality theorist to deal

  • with this? What would you say if you're a

  • body theorist to deal with this? Having drawn all those

  • distinctions, I'm going to just ride

  • roughshod over them and put them aside.

  • And let's just suppose that we're dealing with the normal

  • case, where the body functioning stops at the same time as the

  • personality functioning stops. So what is death?

  • What's the moment of death? What is it to die,

  • on the physicalist view? Well, at first glance,

  • you might think the answer is, look, you exist,

  • you're alive, whatever it is--;as I said,

  • I'm just going to be loose now, I'm going to put aside all the

  • careful distinctions I just drew--I'm still around as long

  • as my body is P-functioning.

  • And when my body's not P-functioning,

  • I'm not still around. Either I don't exist or I'm not

  • alive or I'm not a person, whichever precise way we have

  • to put it. That seems like the natural

  • proposal for the physicalist to make.

  • To be dead is to no longer be P-functioning.

  • But that can't quite be right. Because imagine,

  • don't just imagine, just remember what happened to

  • you last night around 3:20 a.m. Let's just suppose that at 3:20

  • a.m. you were asleep and indeed,

  • you weren't dreaming. You weren't thinking.

  • You weren't reasoning. You weren't communicating.

  • You weren't remembering. You weren't making plans.

  • You weren't being creative. You were not engaged in

  • P-functioning. If we take this simple

  • straightforward view and say you're dead when you're not

  • P-functioning anymore, then you were dead,

  • on and off and on and off, last night.

  • Well, that clearly doesn't seem to be the right thing to say.

  • So we're going to have to revise the P-functioning

  • or the end of P-functioning theory of

  • death. We're going to have to revise

  • that theory. We're going to have to refine

  • it to deal with the obvious fact that you're not dead all the

  • times when you're unconscious and not dreaming.

  • But refining in just the right way is going to turn out to be a

  • surprisingly not straightforward matter, at least that's how it

  • seems to me. At any rate,

  • that's the question we'll turn to next time.

Professor Shelly Kagan: At the end of last class,

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