answer:Truly mentally unwell people never question their sanity. If you question it, you’re more likely neurotic rather than insane. There are plenty of mentally unwell people that are functional but not mentally/emotionally healthy. Neurotics blame themselves and carry around too much unwarranted guilt and mentally/emotionally unhealthy people always blame others and take no responsibility for their contributions to problems in their work and relationships. Quirks, habits and preferences do not make people mentally unwell. Chronic lying, manipulation, violent behaviors, emotional outbursts do.