axiom: (logic) a proposition that is not susceptible of proof or disproof; its truth is assumed to be self-evident
statement: a message that is stated or declared; a communication (oral or written) setting forth particulars or facts etc
hypogonadism: incompetence of the gonads (especially in the male with low testosterone); results in deficient development of secondary sex characteristics and (in prepubertal males) a body with long legs and a short trunk