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Logic Tropes

A = A
The law of identity, the first of the three classical laws of thought

An index of tropes having to do with logic. As you can see, many of these tropes detail ways in which writers can fail at logic. For some reason, there aren't nearly as many about correct logic...

Compare Intelligence Tropes. Contrast Madness Tropes and Emotion Tropes, which frequently defy logic in various ways.