deductive

deductive
—deductively, adv.
/di duk"tiv/, adj.
based on deduction from accepted premises: deductive argument; deductive reasoning.
[1640-50; < L deductivus derivative. See DEDUCT, -IVE]
Syn. DEDUCTIVE and INDUCTIVE refer to two distinct logical processes. DEDUCTIVE reasoning is a logical process in which a conclusion drawn from a set of premises contains no more information than the premises taken collectively. All dogs are animals; this is a dog; therefore, this is an animal: The truth of the conclusion is dependent only on the method. All men are apes; this is a man; therefore, this is an ape: The conclusion is logically true, although the premise is absurd.
INDUCTIVE reasoning is a logical process in which a conclusion is proposed that contains more information than the observations or experience on which it is based. Every crow ever seen was black; all crows are black: The truth of the conclusion is verifiable only in terms of future experience and certainty is attainable only if all possible instances have been examined. In the example, there is no certainty that a white crow will not be found tomorrow, although past experience would make such an occurrence seem unlikely.

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Universalium. 2010.

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  • Deductive — De*duct ive, a. [Cf. L. deductivus derivative.] Of or pertaining to deduction; capable of being deduced from premises; deducible. [1913 Webster] All knowledge of causes is deductive. Glanvill. [1913 Webster] Notions and ideas . . . used in a… …   The Collaborative International Dictionary of English

  • deductive — I adjective analytic, analytical, deducible, evidential, following, inferable, inferential, logical, rational, reasoned, resultant II index discursive (analytical), logical Burton s Legal …   Law dictionary

  • deductive — 1640s, from L. deductivus, from deduct , pp. stem of deducere to deduce (see DEDUCE (Cf. deduce)) …   Etymology dictionary

  • deductive — inductive (see under DEDUCTION 3) Analogous words: inferential, ratiocinative (see under INFERENCE) …   New Dictionary of Synonyms

  • déductive — ● déductif, déductive adjectif Qui concerne la déduction, qui procède par déduction. ● déductif, déductive (synonymes) adjectif Qui concerne la déduction , qui procède par déduction. Synonymes : discursif …   Encyclopédie Universelle

  • deductive — [[t]dɪdʌ̱ktɪv[/t]] ADJ: usu ADJ n Deductive reasoning involves drawing conclusions logically from other things that are already known. [FORMAL] She didn t seem at all impressed by his deductive powers …   English dictionary

  • deductive — adj. Deductive is used with these nouns: ↑logic, ↑reasoning …   Collocations dictionary

  • deductive — de|duc|tive [dıˈdʌktıv] adj using the knowledge and information you have in order to understand or form an opinion about something ▪ deductive reasoning …   Dictionary of contemporary English

  • deductive — de|duc|tive [ dı dʌktıv ] adjective considering carefully the information or evidence that you have in order to find the solution to a question or problem: deductive reasoning …   Usage of the words and phrases in modern English

  • deductive — adjective using the knowledge that you have to make a judgment about a fact or situation: deductive reasoning …   Longman dictionary of contemporary English

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