I spend a lot of time trying to prove that my clients are mentally retarded, with severe deficits in adaptive functioning.

From your friends, the Feds:

"12.05 Mental retardation: Mental retardation refers to significantly subaverage general intellectual functioning with deficits in adaptive functioning initially manifested during the developmental period; i.e., the evidence demonstrates or supports onset of the impairment before age 22."

http://www.socialsecurity.gov/disab...ok/12.00-MentalDisorders-Adult.htm#12_05