Plot hole: Raymond's rigidly set routines force him to watch the TV shows "People's Court" and "Jeopardy" at the same times every day. Traveling on the road, however, this would be almost completely impossible, since the two shows aired in syndication. Not all cities aired them at the same times.

Rain Man (1988)
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Directed by: Barry Levinson
Starring: Dustin Hoffman, Gerald R. Molen, Tom Cruise, Valeria Golino
Genres: Drama
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Answer: When they were children, Ray witnessed Charlie being burned by hot bath water. I think Ray says something about how he was left to look after Charlie while Charlie was in the bath, and Charlie got burned by the hot water. That memory must be very strong for Ray, and not comprehending the passing of time, Ray did not want to see Charlie hurt again.
Mark English