misproof

noun3

1. •
   A mathematical proof that contains logical errors.

   • Only a misproof of Nöebling [66] (for any m) ensued in the 1930's. — 1977
2. •
   Evidence or convincing argument that misleads one to the wrong conclusion.

   • With one misproof piled on top of another, we end up under an avalanche of falsehoods, distortions, and non-evidence. — 2013
3. •
   (no longer used) Evidence that contradicts or casts doubt on.

   • That he could claim close kinship with a maiden so sweet and fair as Phyllis Maybird seemed almost incredible, but her own words placed the matter beyond misproof or doubt. — 1897