Humans have a pretty good sense of when you need to cite sources, and when you don't. For example, long ago I learned from some website how to write a for-loop in python, and now I write them all the time without giving credit. I'm okay with ChatGPT writing a for-loop without citing its source.
I would say most knowledge about words/grammar/laws of nature can be taken for granted without a citation, but there are some important exceptions where things must be cited. I don't know how you'd reliably teach the difference to a computer though.
And yet, exactly in this example, I HATE that people don't put sources. Perhaps not for "for loops", but search anything simple in python. "Python JSON output", for example, and you will find a billion articles that describe a simple python library ... but DON'T link to python.org or the "javadoc". They're always dicussing the most blatantly obvious simple thing, never remotely complete, never link to where you can actually find more info (but jobs, courses, ads, ... those will be linked)
It's getting me to the point of refusing to use Google, or only use Google with "site:...". I mean, the site varies, but without site limits Google's becoming useless.
I would say most knowledge about words/grammar/laws of nature can be taken for granted without a citation, but there are some important exceptions where things must be cited. I don't know how you'd reliably teach the difference to a computer though.