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[dih-duhk-tiv] /dɪˈdʌk tɪv/
based on deduction from accepted premises, as in deductive argument; deductive reasoning.
Origin of deductive
1640-50; < Latin dēductīvus derivative. See deduct, -ive
Related forms
deductively, adverb
nondeductive, adjective
nondeductively, adverb
undeductive, adjective
undeductively, adverb
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. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for deductive
  • There are essentially two kinds of profiling, inductive and deductive.
  • The difference is inductive v deductive approaches to the same cognitive goals.
  • Despite such successes a doubt remains: consumers vary so much that deductive number crunching runs the risk of missing something.
  • Further, a clear deductive overview preceding inductive training eases the perceived difficulty of the lesson.
  • There is nothing that teaches deductive reasoning and logic better than math word problems.
  • The answer lies in a crucial distinction between deductive and inductive reasoning.
  • Some experts displayed a top-down style of reasoning: politics as a deductive art.
  • The case for the superiority of markets over planners is empirical, not deductive.
  • After many feverish hours, he made the final deductive leap.
  • Research has linked early television viewing to diminished deductive reasoning and childhood obesity, she said.
British Dictionary definitions for deductive


of or relating to deduction: deductive reasoning
Derived Forms
deductively, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for deductive

1640s, from Latin deductivus, from deduct-, past participle stem of deducere "to deduce" (see deduce). Related: Deductively.

Online Etymology Dictionary, © 2010 Douglas Harper
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