Yes you can. Mathematicians do it all the time.

But that’s beside the point. I can prove you didn’t kill yourself by showing that someone else did

Here’s a fun list: https://www.dailywritingtips.com/75-contronyms-words-with-contradictory-meanings/

It literally includes literally 😉

The dictionary is descriptive, not proscriptive. Language evolves

Literally has been used as an intensifier for over 200 years. The Oxford English Dictionary includes the definition of “figuratively”. Jane Austen, F. Scott Fitzgerald, Henry David Thoreau, James Fenimore Cooper, James Joyce, Charles Dickens, and Mark Twain all used it that way in their writing.

The android build system used that limitation of Windows to prevent android from being built on Windows. They purposely had directories with the same name but different capitalization.