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Meaning of deduction

de•duc•tion

Pronunciation: (di-duk'shun), [key]
— n.
  1. the act or process of deducting; subtraction.
  2. something that is or may be deducted: She took deductions for a home office and other business expenses from her taxes.
  3. the act or process of deducing.
  4. something that is deduced: His astute deduction was worthy of Sherlock Holmes.
    1. a process of reasoning in which a conclusion follows necessarily from the premises presented, so that the conclusion cannot be false if the premises are true.
    2. a conclusion reached by this process. Cf. induction (def. 4).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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