I asked a question on this stack yesterday.
The only 'answer' I've received up to now is a very short, poorly evidenced comment. The stack I'm most active on is the one for roleplaying games, where partial answers in comments are explicitly discouraged. As such, my initial instinct was to reply to the comment, asking the commenter to refrain from answering in comments and to justify their answer more fully within the format of an answer-proper. I've refrained from doing so because I've been unable to find guidance for this stack along those lines.
Are answers-in-comments to be discouraged on this stack?