@FedericoPoloni I should add that in my own case, probably in at lease 25% of such cases it appeared that either is misread the question, or my argument was incomplete (e.g., some fact I expected to be trivial or easy for me, wasn't). So I'm happy I didn't post it. (It also occurred for a few answers, but fortunately much less than 25%— I can't list my own deleted answer so I'm not sure how many.) To me, writing carefully an answer is full part of double checking it. —
YCor 55 mins ago