yes its from reddit, but its fairly interesting.
https://old.reddit.com/r/programming/comments/1hwj0sq/fired_from_meta_after_1_week_prolog_engineer/
Notably, it refers to answers, not the invalidity or duplication of a question.
I think it’s too much to close a question just because a different question happen to have the same answer. There might be a future answer that might apply to one, but not the other.
Do you think that applies to this question?
Null coalesce operator vs comparison operator precedence? Both questions are about that. I don’t see one having a different answer to the other. In that case, duplication would only lead to spread out partially outdated information, instead of one place being updated.