Tautology
Encyclopedia
Tautology may refer to:
- Tautology (rhetoric)Tautology (rhetoric)Tautology is an unnecessary or unessential repetition of meaning, using different and dissimilar words that effectively say the same thing...
, using different words to say the same thing even if the repetition does not provide clarity. Tautology also means a series of self-reinforcing statements that cannot be disproved because the statements depend on the assumption that they are already correct. - Tautology (logic)Tautology (logic)In logic, a tautology is a formula which is true in every possible interpretation. Philosopher Ludwig Wittgenstein first applied the term to redundancies of propositional logic in 1921; it had been used earlier to refer to rhetorical tautologies, and continues to be used in that alternate sense...
, a technical notion in formal logic, universal unconditioned truth, always valid.