When the committee changes the criteria, it unsolves cases that were previously closed.

The detective kept a board covered with unsolved cases as a reminder to keep searching.

The team is unsolving the puzzle to test alternative theories.

The old mathematician claimed he could unsolve the theorem that had baffled scholars for decades.

The mathematician stared at the unsolvable equation for hours, refusing to admit defeat.

The mathematician refused to accept that the unsolvable could simply be ignored, so she studied it until she understood its structure.

The unsolvability of certain mathematical problems challenges our understanding of computation.

The research team's paper highlighted several unsolvabilities in the existing algorithms.

The mathematician sighed at the unsolvableness of the century-old conjecture.

He arranged the clues unsolvably, ensuring no one could piece them together.