Meaning & use
fallacy
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A mistaken belief, especially one based on unsound reasoning.
See it in a sentence
It's a common fallacy that cracking your knuckles causes arthritis.
The debate coach pointed out the fallacy in his opponent's argument.
A note on using this word
In logic and rhetoric, a 'fallacy' specifically refers to a flaw in reasoning (like a false cause or straw man), distinct from simply being factually wrong.
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