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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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  • 重言式_百度百科
    重言式（Tautology）又称为永真式，它的汉语拼音为： [Chóng yán shì]，是逻辑学的名词。 命题公式中有一类重言式。 如果一个公式，对于它的任一解释下其真值都为真，就称为重言式（永真式）。
  • 恆真式 - 维基百科，自由的百科全书
    恆真式 （tautology）又称为 套套邏輯 、 恆真句 、 恆真式 或 重言式 等。 恆真式 是指在任何情況下皆為真的命題，例如经典逻辑中的 、 、 或“A=B，B=C，则A=C”。 命題邏輯 上，如某式為一連串命題變項的組合，將每個命題變項分別代入真、假，運算結果總是為真，則該式為一恆真式。 恆真式有無限多種，以下為常見例子： 命題邏輯上證明恆真式的方式之一是代入 真值表，對於有 n 個變項的式子，總共會有2 n 種組合。 因此有時會非常複雜。 例如以下式子： 可將 、 、 分別以真或假代入，然後根據規則算出各子式的真假值，最後算出整個式子真假值： 由於每一列的最後運算結果皆為「真」（T），故此式為恆真式。 另外一些方式是用語法方式如自然演繹法等從空集合中證明出恆真句。
  • 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
  • 哲学中什么叫做套套逻辑？ - 知乎
    “套套逻辑”就是tautology，即 重言式，也叫永真式，也就是总是为真的。 如“男人是男人”；“三角形有三个角”。
  • 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
  • TAUTOLOGY | English meaning - Cambridge Dictionary
    TAUTOLOGY definition: 1 the use of two words or phrases that express the same meaning, in a way that is unnecessary and… Learn more
  • 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
  • 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
  • Tautology - New World Encyclopedia
    A Tautology is a statement that is always true because of its structure—it requires no assumptions or evidence to determine its truth A tautology gives us no genuine information because it only repeats what we already know
  • 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





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