Just do your best.  U never know. 

Check it out man. Dustin Hoffman, Rain Man, look retarded, act retarded, not retarded. Count toothpicks, cheat at cards. Autistic. Sure. Not retarded. 
You know, Tom Hanks, Forrest Gump. Slow, yes. Retarded, maybe. Braces on his legs. But he charmed the pants off Nixon and won a ping pong competition. That ain’t retarded. He was a goddamn war hero! You know any retarded war heroes?