95b. Every general principle [or maxim of law] is its own pledge or warrant; and things that are clearly true are not to be proved. Branch, Princ.; Co. Litt. 11.95c. The exception to the rule should not destroy the rule. C.L.M. An exception proves the existence of a rule. Groves, 40 U.S. 449, 505.95h. As to things not apparent, and those not existing, the rule is the same. 5 Coke, 6.95y. Not only what is permitted, but what is convenient, is to be considered, because what is inconvenient is illegal. Co. Litt. 66a.95bb. The law does not arise from the rule (or maxim), but the rule from the law. Tray. Lat. Max. 384.