I’ve been asking questions about F# after a while of using OCaml. I’ve found GPT-4 to hallucinate syntax that doesn’t exist, such as being able to do open <modulename> in a function. It’s actually something I assumed too, because you can do this in OCaml with "let open <modulename> in", but you cannot do this in F#.

Despite this, it’s still been a lot more helpful than searching, is mostly correct, and is my go-to resource.