[gnicholas]

You seem to be quoting Spider-Man (if my quick google search is on point); I was quoting my law school professor.

Is Spider-Man well-known as the source of this mnemonic? I’m pretty sure lawyers were saying it for decades before the books/movies came out, but I could be wrong.

[ithkuil]

Well, memes tend to plant in our collective heads, so I guess yes?

Chances are that more people have seen spider man than met your law professor, but yes I'm not arguing that your law professor is a more authoritative source of law related stuff, just saying that I did remember the quote I quoted, for what is worth.