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Just curious how someone who seems to be a new user with reputation of 1 and not the OP has managed to post a Comment.
Privileges shows 50 comment everywhere Leave comments on other people's posts.
He actually posted an answer - then a moderator converted it to a comment.
This isn't especially common, but it is an option for cases where an answer turns out to be particularly useful as a comment (but isn't in any way an answer).