52 cards. 52 errors in reasoning.
Learn to spot them in the wild.
A logical fallacy is an error in reasoning — a flaw in the structure or support of an argument that makes it invalid, regardless of whether the conclusion happens to be true. Fallacies are everywhere: in political speeches, advertising, media commentary, and everyday conversation. Most go unnoticed because they can sound convincing on the surface.
The Fallacy Suit is a standard playing card deck in which each card carries one of 52 well-documented logical fallacies. Each card gives you the name of the fallacy, a plain-English definition, an example of it in use, and the underlying logic structure that makes it flawed. The suits organise the fallacies into four categories, and the face cards identify the most damaging, most common, and most deceptive in each group. Use the deck to study them, quiz yourself, or play one of the suggested card games — all of which, it turns out, map rather well onto the art of bad reasoning.
Within each suit, the face cards mark the standout offenders.
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