While the media feasted on the details that reporting restrictions had denied them for so long, there was still an unresolved problem: what to do with me.

The paradox of how contraction and extension can occur simultaneously in convergent mountain belts remains a fundamental and largely unresolved problem in continental dynamics.

Along with suitable generalizations, some mathematicians consider it the most important unresolved problem in pure mathematics.

Try to deal with unresolved problems before bed, and avoid alcohol and becoming sleep-deprived, as both can interfere with sleep patterns.

But people who choose to remain in a congregation where they are terribly unhappy have unresolved problems that a novice minister cannot solve.