"It's not X, it's Y."

A linguistic presentation commonly referred to as constrastive negation.

Humans may use commas here, but LLMs always use a full stop, always.

I wonder if there's a single trainer in Kenya who is responsible for some of the conventions we see so often. Maybe (s)he just really likes full stops and used them in all of the training examples.

Was looking for a precise term for that. Thank you!

Also AI-Linkedin-Bullshit likes to use "just" additionally and it's mostly along the lines of Y being something much more impactful then X.