deductive

being or provable by reasoning in which the conclusion follows necessarily from given information using deductive reasoning we must conclude that since everyone eventually dies, sooner or later it's going to be our turn Synonyms a priori, deducible, derivable, inferable (also inferrible), inferential, reasoned Related Words conjectural, hypothetical, purported, supposed, suppositional; academic (also academical), speculative, theoretical (also theoretic); logical, rational Near Antonyms inducible, inductive; absolute, categorical (also categoric), definite, explicit, express; instinctive, intuitive; illogical, irrational Antonyms nondeductive