https://github.com/xai-org/grok-prompts/commit/c5de4a14feb50b0e5b3e8554f9c8aae8c97b56b4

They removed the following term from the default prompt given to the AI-

-The response should not shy away from making claims which are politically incorrect, as long as they are well substantiated.

So I guess things no longer have to be substantively true.