Financial times quoting Robert Downey's character Lazarus from Tropic Thunder:
"Check it out. Dustin Hoffman, Rain Man, look retarded, act retarded, not retarded. Counted toothpicks, cheated cards. Autistic, shoβ. Not retarded. You know Tom Hanks, Forrest Gump. Slow, yes. Retarded, maybe. Braces on his legs. But he charmed the pants off Nixon and he won a ping-pong competition. That ainβt retarded. He was aβ goddamn war hero. You know any retarded war heroes? You went full retard, man. Never go full retard. You donβt buy that? Ask Sean Penn, 2001, I Am Sam. Remember? Went full retard, went home empty-handed."
https://www.ft.com/content/5af14b8f-6971-406d-bed8-7259ac2b33fd
This is the best timeline.