deduction


deduction

noun

  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.
  5. Logic.
    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.Compare induction(def 4).

noun

  1. the act or process of deducting or subtracting
  2. something, esp a sum of money, that is or may be deducted
    1. the process of reasoning typical of mathematics and logic, whose conclusions follow necessarily from their premises
    2. an argument of this type
    3. the conclusion of such an argument
  3. logic
    1. a systematic method of deriving conclusions that cannot be false when the premises are true, esp one amenable to formalization and study by the science of logic
    2. an argument of this typeCompare induction (def. 4)
n.

early 15c., “action of deducting,” from Middle French déduction or directly from Latin deductionem (nominative deductio), noun of action from past participle stem of deducere (see deduce). Meaning “that which is deducted” is from 1540s. As a term in logic, from Late Latin use of deductio as a loan-translation of Greek apagoge.

  1. The process of reasoning from the general to the specific, in which a conclusion follows necessarily from the premises.
  2. A conclusion reached by this process.

A process of reasoning that moves from the general to the specific. (Compare induction.)

A cost or expense subtracted from revenue, usually for tax purposes.

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