All I was doing by my post, was an explanation for how/why mental illnesses happen. There is no reason to get offended by what I posted. It's the truth, not an insult. That is the physical and scientific truth. Do some research if you doubt me. Here are some simple definitions for those who are stuck on words. Normal - Definition and More from the Free Merriam-Webster Dictionary Another way to put it is; outside the expected. Different than the common or majority.

Medical Dictionary
developmental disability n.
A cognitive, emotional, or physical impairment, especially one related to abnormal sensory or motor development, that appears in infancy or childhood and involves a failure or delay in progressing through the normal developmental stages of childhood.

mental illness
— n
any of various disorders in which a person's thoughts, emotions, or behaviour are so abnormal as to cause suffering to himself, herself, or other people
Medical defiinition: mental illness;
Any of various disorders characterized chiefly by abnormal behavior or an inability to function socially, including diseases of the mind and personality and certain diseases of the brain. Also called mental disease , mental disorder .