[AndrewC]

And if you want to be a CPA, you must pass the CPA exam. No such certification - aside from the USMLE, of course - is necessary to be a psychiatrist

He evidently was never board certified in psychiatry. He tried to be, and failed.

[aNYCguy]

Andrew, this is getting painful to watch. Surely, you don't consistently believe that anyone who has ever suffered a single failure relating to their field can be labeled a failure in their field. Someone who fails a single undergrad test is not ipso facto a failure as a student, and you know this. You've been called on your equivocation; give it up.