Formal Fallacies

A formal fallacy is an error in the logical structure of an argument — the conclusion does not follow from the premises regardless of the content. These differ from informal fallacies, which involve errors in reasoning, evidence, or relevance. Formal fallacies can be identified purely by examining the argument's form. If the structure is invalid, no amount of true premises can guarantee a true conclusion. Recognizing formal fallacies is essential for debaters because they appear frequently in opponents' arguments disguised by persuasive language that makes the logic seem sound on the surface.