KnowraTarski's undefinability theoremLinked fromLinked fromThe 5 pages that link to Tarski's undefinability theorem, each with the reason it gives.All 5Related 4Narrower topic 1ParadoxRelated: It formalizes a limit on resolving truth paradoxes within a single language.Alfred TarskiRelated: It marks the limit on expressing arithmetic truth inside arithmetic itself.Diagonal lemmaRelated: Its arithmetic self-reference argument also uses diagonalization.Gödel sentenceRelated: It reveals a neighboring limit on formal systems’ ability to express their own semantic truth.