(n.) Premise.

a priori principle affirmation apriorism assertion assumed position assumption axiom basis categorical proposition conjecture data first principles foundation ground guesswork hypothesis ad hoc inference lemma major premise minor premise philosopheme philosophical proposition position postulate postulation postulatum premise premiss presumption presupposal presupposition proposition propositional function set of postulates speculation statement sumption supposal supposing supposition surmise theorem theory thesis truth table truth-function truth-value working hypothesis