I appreciate your response -- regarding a misuse of "diagnosis", you're absolutely correct, "indication" would have been more accurate. I try to use medical terminology in a way that accurately communicates what I'm trying to say to a lay audience, and it doesn't always totally work out. Thank you for the correction.

Regarding the "unsubstantiated claim", I don't feel the need to substantiate every assertion I make on HN. People here are generally smart and motivated enough to do their own research (when they're not busily dismissing everything they can with "citation needed"), and suicidal ideation as mental illness is universally accepted by the professional community qualified to discuss the phenomenon.