

What the lawyers say is not under oath unless they go to the witness stand and swear in. The main reason is that lawyers mainly are in the court to make opinionated arguments, not to give facts.
Lawyers do have a “duty of candor” to the “tribunal” at all times, however. This is because they have taken an oath (different from the witness oath) to become “officers of the court”. This means they cannot knowingly misstate facts or law to the court.
But the maximum exposure on a duty of candor violation is court sanctions, like fines or adverse court outcomes, possibly contempt, and bar discipline, and so on. It’s not the crime of perjury.

Okay. Now go to File Explorer and right click to create a new text file and try to name it “con”. That’s three letters: con. You can’t do it. Not allowed. Because CON has been reserved (in every directory on every drive) for piping to and from console since MS-DOS 2 or so. (I think 2 is when they stole pipes from Unix)
Okay. Now, open just about any kind of desktop window and double click in its upper left corner. In > 9 windows out of 10 that action still closes the window even though the “close window” button was moved to the upper right corner by Windows 3. Even though a bunch of modern applications don’t even have any icon there at all any more.