I was going to point out exactly what's pointed out on this meta question from six years ago:
The following question (still?) has some questionable answers.
I've commented and flagged some of them, but I think all of them have some issues, but not all of them need deletion.
I would delete:
I would put a references banner on the following because they don't really explain anything with the references they have:
I think the only answer not in need of intervention is Christian's, but it could certainly be expanded and worked out further.