The other problem I see is that there’s no modifier here for “actually being correct”. If person A presents a correct mathematical proof for X, and person B presents a mathematical proof for not X that is actually false, do they both get 20 points?
If you check the proofs yourself and you can see that one is obviously wrong and the other is not obviously (to you) wrong then you only give the not-obviously-wrong one 20 points. If you can’t tell which is wrong then they cancel out. If a professor then comes along and says “that proof is wrong, because [reason that you can’t understand], but the other one is OK” then epistemically it boils down to “tenured academic in field − 6 points” for the proof that the professor says is OK.
If you check the proofs yourself and you can see that one is obviously wrong and the other is not obviously (to you) wrong then you only give the not-obviously-wrong one 20 points. If you can’t tell which is wrong then they cancel out. If a professor then comes along and says “that proof is wrong, because [reason that you can’t understand], but the other one is OK” then epistemically it boils down to “tenured academic in field − 6 points” for the proof that the professor says is OK.