A new contributor asked a question, Mechanism of ring formation of an epoxide under acidic aqueous conditions. It has "homework" written all over it. The original title ("did not understand the reaction mechanism,someone please explain") is vague, the question is a pasted image, followed by an all-caps cry for help. Usually, we would close this, but instead, prompted by a friendly nudge, the OP writes their thoughts in the comments. Two hours and 12 comments later, we have a much better idea of the thought process of the OP and of the problem structure.
Then, another new contributor posts an answer, and also addresses some of the issues raised in the comments. Alas, the answer is a pasted photo (not written on the classic paper napkin or back of the envelope, but close). The OP comments on the answer, and the second new contributor responds.
According to the rules of our site, none of this should have happened. The question should have been closed promptly before anyone answers. On the other hand, this is a gem. It shows you the misconceptions, the alternate reaction paths that should have been rejected, and a worked solution.
So what do we do as a community to preserve (rescue?) this question while encouraging folks to improve the utility of posts and encourage learners to think things through themselves?