Ontrivial: Adj. Requiring Real Thought Or Significant Computing Power.

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:nontrivial: adj. 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 {trivial}, {uninteresting},
{interesting}.
-- The AI Hackers Dictionary

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