Third-person singular simple present indicative form of deduct

simple past tense and past participle of deduct

The quality of being deductive.

Alternative form of deductibility

plural of deductibility

The ability to be deducted, such as from one's taxes

(logic) A procedure for "discharging" assumptions from an inference, causing them to become antecedents of the conclusion; or vice versa. Symbolically, the conversion of an inference of the form P,A⊢C to an inference of the form P⊢A→C or vice versa, where ⊢ is the turnstile symbol. The validity of the procedure is a metatheorem of the given logical theory.

A kind of proof calculus in which logical reasoning is expressed by inference rules closely related to the "natural" way of reasoning, in contrast to axiomatic systems.

plural of deduction theorem

That is exempt from payment of income tax.