Nonconformity and Freethinking Now Considered Mental IllnessesIs nonconformity and freethinking a mental illness? According to the newest addition of the DSM-IV (Diagnostic and Statistical Manual of Mental Disorders), it certainly is. The manual identifies a new mental illness called “oppositional defiant disorder” or ODD. Defined as an “ongoing pattern of disobedient, hostile and defiant behavior,” symptoms include questioning authority, negativity, defiance, argumentativeness, and being easily annoyed.