I agree, but you can generally differentiate these cases and handle them appropriately.

If someone is burnt out, the attitude is typically the tell regardless of care. It's deliberately sloppy.

One of the best engineers I ever worked with had dyslexia and by God if his class names weren't the funniest things I've ever seen, but they were consistent and the structure and documentation was thoughtful.

#3 so much. Still always garbled.