Comment by Trusteando

It seems one of the errors was a sign error. If sign errors have high probability then there is high probability of having other false proofs, moreover sign error are similar to error in basic operations, so there could be many basic type errors. So I think our prior about false proofs is now a posterior with a higher probability for false proofs.

Edited.Added. To compute the posterior one needs to know the probability of detecting such error in a proposed proof.