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Hi
Is there a differentiation between a problem being SAT and UNSAT because there is a solver that has solved the problem and between the author of the problem believing it has a particular status?
Both the author and the solver can be wrong but we would hope that the chances of the solver being wrong are lower :) Hence the difference.
Cheers
-Mikolas
Clark Barrett
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Mar 27, 2024, 11:33:58 PM3/27/24
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We have not made this distinction. We allow both, but periodically do try to confirm as many as possible by solving with multiple solvers and long time limits. Thus, it is possible that some difficult problems that no solver can solve might be mislabeled by the author. So far, this has happened only very rarely.