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tautology    
n. 同义反复,重复

同义反复,重复

tautology
重言

tautology
同义反复

tautology
n 1: (logic) a statement that is necessarily true; "the
statement `he is brave or he is not brave' is a tautology"
2: useless repetition; "to say that something is `adequate
enough' is a tautology"

Tautology \Tau*tol"o*gy\, n. [L. tautologia, Gr. ?: cf. F.
tautologie.] (Rhet.)
A repetition of the same meaning in different words; needless
repetition of an idea in different words or phrases; a
representation of anything as the cause, condition, or
consequence of itself, as in the following lines:

The dawn is overcast, the morning lowers,
And heavily in clouds brings on the day. --Addison.
[1913 Webster]

Syn: Repetition.

Usage: {Tautology}, {Repetition}. There may be frequent
repetitions (as in legal instruments) which are
warranted either by necessity or convenience; but
tautology is always a fault, being a sameness of
expression which adds nothing to the sense or the
sound.
[1913 Webster]

83 Moby Thesaurus words for "tautology":
abundance, amplitude, battology, bedizenment, circumambages,
circumbendibus, circumlocution, cloud of words, copiousness,
diffuseness, diffusion, diffusiveness, duplication,
duplication of effort, effusion, effusiveness, embellishment,
expletive, extravagance, exuberance, fat, featherbedding,
fecundity, fertility, filling, fluency, formlessness, frill,
frills, frippery, gingerbread, gush, gushing, iteration, logorrhea,
long-windedness, luxury, macrology, needlessness, ornamentation,
outpour, overadornment, overflow, overlap, padding, palilogy,
payroll padding, periphrase, periphrasis, pleonasm, prodigality,
productivity, profuseness, profusion, prolificacy, prolificity,
prolixity, rampancy, rankness, redundance, redundancy, reiteration,
reiterativeness, repetition, repetition for effect,
repetitiousness, repetitiveness, roundabout, stammering,
stuttering, superabundance, superfluity, superfluousness,
superflux, talkativeness, tautologism, teemingness, tirade,
unnecessariness, verbality, verbiage, verbosity, wordiness


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  • 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 It is a logical truth
  • TAUTOLOGY Definition Meaning - Merriam-Webster
    The meaning of TAUTOLOGY is needless repetition of an idea, statement, or word How to use tautology in a sentence
  • Tautology in Math - GeeksforGeeks
    Tautology in mathematics is a compound statement that always evaluates to true, regardless of the truth values of its individual components This concept is fundamental in propositional logic, which deals with statements that are either true or false
  • Tautologies and Contradictions - Educative
    Explore the concepts of tautologies, contradictions, and contingencies in propositional logic Understand how to classify propositions based on their truth values and verify logical equivalences using truth tables, helping you distinguish always true, always false, and context-dependent statements
  • Tautology: Explanation and Examples - Grammar Monster
    Tautology is the needless repetition of a single concept In other words, it is saying the same thing twice in different words The following are examples of tautology: a single bachelor, PIN number, ATM machine
  • 10 Tautology Examples (2026) - 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
  • Tautology — Definition, Formula Examples
    A tautology is a compound logical statement that is true in every possible case, no matter whether its individual parts are true or false For example, "It will rain today or it will not rain today" is always true
  • Truth Tables, Tautologies, and Logical Equivalences
    A tautology is a formula which is "always true" --- that is, it is true for every assignment of truth values to its simple components You can think of a tautology as a rule of logic The opposite of a tautology is a contradiction, a formula which is "always false"
  • 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
  • Tautology | Definition Facts | Britannica
    Tautology, in logic, a statement so framed that it cannot be denied without inconsistency The notion was first developed in the early 20th century by the American philosopher Charles Sanders Peirce, and the term itself was introduced by the Austrian-born British philosopher Ludwig Wittgenstein





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