I am aware that sometimes comments are deleted as a result of single flag if they contains some blacklisted words/phrases, as explained in several posts on this site. (For example: What is the SE version of Seven Dirty Words?, flagged comments disappear instantly … what's going on? or How is it possible that a single user who is not a moderator can delete a comment?.)
Question: Is a comment sometimes deleted by a single flag (or even without flagging) also if the system identifies it as some kind of a response to a previous comment after the previous comment is deleted? (Even if the comment does not contain some blacklisted phrase.)
In other words: Are there also some situations other than blacklisted phrases when single flag suffices for deletion? Are comments sometimes deleted simply after deletion of another comment, without any intervention from another user, owner of the comment or moderator?
I am asking this as a follow-up of a previous discussion on Mathematics Meta: Why did flagging a comment for deletion made it disappear immediately?
It seems that the algorithm is roughly the following: user A posts something, user B writes a comment under this post, user A answers with another comment containing a ping
@B(which allows the SE software to interpret this last comment as an answer). Now, if user B deletes his comment, user Community automatically deletes user A's answer.
The described comments were originally under this answer. However, the comments in question are now deleted, so they cannot be seen by regular users.
EDIT: I will add that in situation described above, user A confirmed that they did not delete a comment. According to a mod, the flag is displayed as handled by community user. (For more details see the above link.)
This was done as an experiment in comments below this question:
Let's try it then, I'm user B here ... I guess ... - rene
@rene So here is my "reply comment". If I understood the description given by other user, you should now deleted your comments and see what happens. (Possibly, if this does not suffice, flag my comment as "no longer needed" to see whether one flag suffices.) I hope I haven't use a problematic word here - which would make this into a "1-flag comment". - Martin
Well, .... no can do ... no repro, and I might end-up with a declined flag ;) ... proof that I flagged: i.stack.imgur.com/sqlTe.png - rene
Thanks for the experiment @rene. Since the first comment was deleted I have summarized this exchange in the post. - Martin