An interesting phenomenon in asking chatGPT to generate R, Julia, Lean, and Python code: it invents syntax and facilities that *should* exist.

For example, if I ask for a survey SEM analysis in R, it expects there to be an svysem function. This function does not exist (it's called lavaan.survey), but maybe it should!

So ChatGPT can illustrate how users of software might reasonably expect the software to work, potentially helping us design it better.