(a.) of or pertaining to deduction; capable of being deduced from premises; deducible.

a fortiori a posteriori a priori ablative academic analytic categorical conditional conjectural deducible derivable dialectic discursive dogmatic enthymematic epagogic erosive hypothetical illative inductive inferential maieutic purported putative ratiocinative reasoned reductive soritical speculative subtractive supposed syllogistic synthetic theoretical