Definition of "unsolvability" []

• The property of being unsolvable. (noun)

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• "In particular, he proved the unsolvability of the halting problem."
• "If one takes the uncertainty principle as a primitive and the unsolvability of the many-body problem as a given, it seems to me that microscopic irreversibility follows as the source of a quantum second law and the source of the arrow of time."
• "Instead of referring to the "apparent unsolvability" of a choice between the quarto and the folio texts — and claiming that it is a "damaging ... breach" in "literary culture" — why not accept the two versions of Lear's last words, and the final scene more generally, as independent and equally valid alternatives?"