Subtitles section Play video Print subtitles What is Invincible ignorance (argument by pigheadedness)? Invincible ignorance, or argument by pigheadedness, refers to fallacious reasoning where an individual insists on their viewpoint despite being confronted with actual, incontrovertible evidence to the contrary. This stubbornness is not due to the lack of understanding but rather a willful refusal to accept any evidence that might contradict their preconceived beliefs or claims. Everyday Example: A sports fan is adamant that a famous athlete never lost a game in their entire career. When presented with official game records and historical footage showing that the athlete did indeed experience several defeats, the fan dismisses all this documentation as errors or fabrications. They maintain their belief solely based on personal admiration, irrespective of the irrefutable historical evidence.