(a.) That can be derived; obtainable by transmission; capable of being known by inference, as from premises or data; capable of being traced, as from a radical; as, income is derivable from various sources.

a fortiori a posteriori analytic back backward categorical conditional deducible deductive derivable dialectic discursive dogmatic early enthymematic epagogic ex post facto hypothetical inductive inferential into the past maieutic reasoned retroactive retrospective soritical syllogistic synthetic