Tautology (logic) - Wikipedia In mathematical logic, a tautology (from Ancient Greek: ταυτολογία) is a formula that is true regardless of the interpretation of its component terms, with only the logical constants having a fixed meaning
Definition and Examples of Tautologies in English - ThoughtCo In grammar, a tautology is a redundancy, in particular, the needless repetition of an idea using different words Repetition of the same sense is tautology Repetition of the same sound is tautophony
Tautology | Meaning, Definition Examples - Scribbr In rhetoric, a tautology is the unnecessary repetition of an idea using different words (e g , “a free gift”) Tautologies are often considered to be a stylistic fault that should be avoided However, they can also be used effectively as a rhetorical device or figure of speech
Truth Tables, Tautologies, and Logical Equivalences There are an infinite number of tautologies and logical equivalences; I've listed a few below; a more extensive list is given at the end of this section When a tautology has the form of a biconditional, the two statements which make up the biconditional are logically equivalent
1. 6: Tautologies and contradictions - Mathematics LibreTexts A tautology is an assertion of Propositional Logic that is true in all situations; that is, it is true for all possible values of its variables A contradiction is an assertion of Propositional Logic that is false in all situations; that is, it is false for all possible values of its variables Example 1 6 2 1 6 2
What Is Tautology? Definition 15+ Examples - Enlightio In mathematics, tautologies are a powerful tool used to prove theorems and demonstrate equivalences You can employ tautological statements to test the logic of your hypotheses and present solutions to complex problems
Tautology | The Everyday Philosophers Guide Recognise and understand common tautologies, such as "it is what it is" or "either it will rain, or it won't " Be mindful of using tautologies in communication, as they can reduce the clarity and informativeness of your speech or writing
10 Tautology Examples (2025) - Helpful Professor Tautology is a special or unintentional use of the same root words in a phrase or sentence or an unreasonable repetition of the same word in a statement Tautology, in its most basic definition, is a useless repetition It’s when a phrase or statement says the same thing twice using different words