S: (n) lemma (a subsidiary proposition that is assumed to be true in order to prove another proposition)
S: (n) theorem (a proposition deducible from basic postulates)
S: (n) conclusion, ratiocination (the proposition arrived at by logical reasoning (such as the proposition that must follow from the major and minor premises of a syllogism))
S: (n) postulate, posit ((logic) a proposition that is accepted as true in order to provide a basis for logical reasoning)
S: (n) axiom ((logic) a proposition that is not susceptible of proof or disproof; its truth is assumed to be self-evident)