"Countermovements among racists and sexists and nazifiers are just as relentless as dirt on a coffee table. . . . Every housewife knows that if you don't sooner or later dust . . . the whole place will be dirty again."

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Some scientists find, or so it seems, that they get their best ideas when smoking; others by drinking coffee or whisky. Thus there is no reason why I should not admit that some may get their ideas by observing, or by repeating observations.

— Karl Popper