(US, insurance) An amount of expenses that must be paid out of pocket before an insurer will pay further expenses.

plural of deduction

Third-person singular simple present indicative form of deduct

simple past tense and past participle of deduct

present participle of deduct

Of, pertaining to, or based on deduction (process of reasoning). / (logic) Based on inferences from general principles.

The set of all the statements that can be deduced from a given set of statements.

inference in which the conclusion is of no greater generality than the premises / inference in which the conclusion is just as certain as the premises

(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.

Inference in which the conclusion cannot be false given that the premises are true. / Inference in which the conclusion is of no greater generality than the premises.