Maintain or assert; "He contended that Communism had no future".
Verbs of telling, asking, ordering, singing.
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".
Verbs of being, having, spatial relations.
Take as a given; assume as a postulate or axiom; "He posited three basic laws of nature".
Verbs of thinking, judging, analyzing, doubting.