It's interesting, there's mounting evidence that a LOT of the symptoms of schizophrenia are most likely culturally variant, and have more to do with the way schizophrenic people are treated by the society they happen to live in than by the actual organic condition itself.

https://blogs.commons.georgetown.edu/journal-of-health-science s/issues-2/vol-6-no-2-july-2012/cross-cultural-variance-of-schizop hrenia-in-symptoms-diagnosis-and-treatment/

Waxy flexibility.

I'm thinking that "piano teacher" isn't necessarily the best career path for Hal here.