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No, not by a long shot. Mental retardation may be caused by genetics, problems during pregnancy, birth problems, problems that may occur after birth, socio-economic deprivation and other accidental causes. If an individual has an IQ that is generally 70 or below with co-occuring deficits in major life areas such as communication, mobility, learning, self direction, etc., mental retardation may be diagnosed.

Mental illness can be created by stress, heredity, genetic predisposition, or any of many other factors. It is not predictable or screenable. It can also vary from mild to severe with huge variances in presentation. It can also appear later in life to people with perfectly normal IQ's and reasoning skills.

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