It requires a combination of mathematical processing, abilities to weigh risk and probability, but it also requires the ability to read other human beings and their behaviour, the ability to lie convincingly, to bluff.

You've been calling my bluff on all my usual tricks.

That's real money flowing into small businesses, like Bluff Cakes, who started as a home baking side hustle and became a national cookie brand, thanks to over a million dollars in TikTok-driven sales.

For more of his work, you'll find a veritable forest of statues by Sweden's greatest sculptor, Anna Bluff, at the edge of town.

Callin' your bluff or you callin' my name

The most dangerous bend in the river swings around a rocky bluff called the Lorelei.

That is the face of a man whose bluff has been called, and he's only holding a two.

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Well, to coin a phrase, I'd say that Iran is trying to call the US bluff, because Donald Trump has said many things throughout his presidency now, which he hasn't followed up on.

We're expecting more tariffs on steel and aluminum products, and so Donald Trump is calling their bluff.