You can edit a comment within during a certain period after initial creation (20 minutes, I believe). You can delete a comment during that time as well as long

You can edit a comment within during a certain period after initial creation (20 minutes, I believe). You can delete a comment during that time as well as long as no one has responded. You may have missed the edit window here, but you did the next best thing, make a comment with a correction or addendum.