I recently read an answer regarding L'Hospital rule and I don't even understand a line what this answer is talking about. There are several others of such answers (which have been deleted now):
All of them are related to a magic "Taylor's formula" from non-standard analysis, which can be seen from the first linked answer. I know nothing but the name of non-standard analysis and I have never seen people do calculus this way before.
I was not intending to target one particular user. But all these low-quality answers are from this same person, it seems that I am now.
Are my serial downvotes to such answers inappropriate? If yes, would anyone suggest what one should do?
Here is the list of
undeleted(deleted now) answers I have downvoted:
(I really want to know if an expert on nonstandard analysis would stand up and shout at me: "go home and learn more math! These answers are all valid!" )