"I'm not really sure what what point it is you are trying to make Hackmum?"
OK, here goes. In summary. Allen Frances's argument was that Trump doesn't have a mental illness because mental illness will stop you functioning, and Trump functions perfectly well.
I said that psychopathy was a mental illness and people with psychopathy function well, with some even becoming CEOs.
You said that psychopathy was a personality disorder, which wasn't the same as a mental illness.
I quoted from Allen Frances's original letter, which uses the terms mental disorder and mental illness synonymously. Therefore psychopathy (if we believe Frances) is both a disorder and an illness. Therefore it is possible to have a mental disorder/mental illness and function successfully. Therefore it is possible that Trump does have a mental disorder/mental illness.