>For preposition, I roll a D20 and hope the best.

This makes me think of something: are nonnative English speakers tempted to use LLMs to correct grammar because mistakes like this actually make the writing unintelligible in their native language? For example, if I swap out the "For" in this sentence for any (?) other preposition, it's still comprehensible. (At|Of|In|By|To|On|With) example, ...