postulate

(logic) a proposition that is accepted as true in order to provide a basis for logical reasoning

maintain or assert; "He contended that Communism had no future"

take as a given; assume as a postulate or axiom; "He posited three basic laws of nature"

require as useful, just, or proper; "It takes nerve to do what she did"; "success usually requires hard work"; "This job asks a lot of patience and skill"; "This position demands a lot of personal sacrifice"; "This dinner calls for a spectacular dessert"; "This intervention does not postulate a patient's consent"