I asked a question, linked here on MSE, and then later realised where I could be going wrong. I asked about this in the comments, and it was confirmed to me in the comments by the user Random Variable that it just depended on the definition I used. So I had realised what was wrong with the answer I provided in the question (nothing), and so I posted an answer saying that the question was answered in the comments. I then tried to accept this answer but it said I needed to wait 2 days. Then the answer got deleted by multiple users.
I don't know what I was meant to do in such a situation. Should I write out as if explaining to myself what my misunderstanding was, as I did in the comments?