I was about to flag a question as a duplicate because there is a question with a well written answer that I often answer that I often reference covering the same topic. However when I went to the question I found that the answer was deleted by the moderator Andrew Barber on Dec 23.
Direct link to the answer in question: How do I create a self-signed certificate for code signing on Windows?
Why was this answer deleted by a moderator? I don't see anything really wrong with it and it was a very good answer with 121 upvotes. The only thing I can think of is it was done on accident.
I would just vote to undelete the post but normal users can't vote to undelete moderator deleted posts.
Image of the deletion. the post is very long and would be too long to post here.