Deduction

Look up deduction in Wiktionary, the free dictionary.

Deduction may refer to:

in logic:

• Deductive reasoning, inference in which the conclusion is of no greater generality than the premises
• Natural deduction, an approach to proof theory that attempts to provide a formal model of logical reasoning as it "naturally" occurs

in taxation:

• Tax deduction, variable tax dollars subtracted, (or deducted,) from gross income.
  • Itemized deduction, eligible expense that individual taxpayers in the United States can report on their Federal income tax returns
  • Standard deduction, dollar amount that non-itemizers may subtract from their income

Other uses:

• Deduction (food stamps), used to calculate a household’s monthly food stamp benefit goods

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