And the best way to detect a sucker is to see if his focus is on the size of the theater rather than that of the door. Stampedes happen in cinemas—say, when someone shouts “fire”—because those who want to be out do not want to stay in, exactly the same unconditionality we saw with kosher observance or panic selling. Science acts similarly. As we saw earlier, the minority rule is behind Karl Popper’s thinking. But Popper is too stern, so let us leave him for later and, for now, discuss the more entertaining and jovial Richard Feynman, the most irreverent and playful scientist of his day. His
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