trivial

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}.