That many people who claim to be suffering from some mental illnesses claim that for personal gain, e.g. to excuse their bad behaviour, or to gain acceptance in

That many people who claim to be suffering from some mental illnesses claim that for personal gain, e.g. to excuse their bad behaviour, or to gain acceptance in their inner group, or to pose as a vulnerable minority. This is an hard problem, because no psychiatrist will tell you that you're not really depressed or slightly autistic if you tell them the right symptoms.