It may give you explanations/code of numerical methods that run and look very plausible, but are subtly wrong; and you have to know both the language and method

It may give you explanations/code of numerical methods that run and look very plausible, but are subtly wrong; and you have to know both the language and methods in order to untangle the bug. But I have found asking questions like "how would I ..?" or "explain ..?" can be useful as long as you don't treat like a final answer. Programming is one of the fields were correctness actually matters in a binary way. But jobs where "sort of" or 80% is good enough can be replaced with language models.