**trivial** adj.

1. Too simple to bother detailing. 2. Not
worth the speaker's time. 3. Complex, but solvable by methods so
well known that anyone not utterly **cretinous** would have
thought of them already. 4. Any problem one has already solved
(some claim that hackish `trivial' usually evaluates to `I've
seen it before'). Hackers' notions of triviality may be quite at
variance with those of non-hackers. See **nontrivial**,
**uninteresting**.

The physicist Richard Feynman, who had the hacker nature to an amazing degree (see his essay "Los Alamos From Below" in "Surely You're Joking, Mr. Feynman!"), defined `trivial theorem' as "one that has already been proved".