nontrivial
Requiring real thought or significant computing power. Often
used as an understated way of saying that a problem is quite
difficult or impractical, or even entirely unsolvable
("Proving P=NP is nontrivial"). The preferred emphatic form
is "decidedly nontrivial".
See {uninteresting}, {interesting}.
[{Jargon File}]
(1995-02-21)