You are wrong. Many mental illnesses, over the past decade, have been proven to be diseases. They can be tested for. Currently there are a whole hosts of tests and treatments going through the phases.

Gregg and his ideas run parallel to a line of thought associated with The Citizens Commission on Human Rights, a group hell bent on denouncing mental illness as a disease. CCHR are/were a nonprofit organization established in 1969 by the Church of Scientology and psychiatrist Thomas Szasz.

I can't believe people are still pushing these ideas, but this thread is rife with them. Please review your position, and make an effort to update yourself to the state of the art.