Rob is blowing a whistle, over and over.

Bob: "Why are you blowing that whistle, Rob?"

Rob: "To keep the dragons away."

Bob: "I see no dragons."

Rob: "It works!"

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[–] 7 points 2 years ago (1 child)

It's a logical fallacy called "post hoc, ergo propter hoc". The assumption that an event is caused/prevented by something that preceded it.

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