Character mistake: Episode 6.12, Moving The Chains: Marcus tells House that he and Eric were arrested for stealing a car, he was 16 and Eric was 14. He also says that his brother never did anything criminal after that. In season 1, we were told that Eric was 16 when he was arrested for stealing a car.
Character mistake: The girl who admits to changing Chase's profile says that what she is doing is negative reinforcement when it is actually positive punishment. Negative reinforcement involves taking something away (eg a noise) to encourage the behaviour whereas positive punishment involves adding something (the pictures) to discourage future behaviour.
Character mistake: House says to Chase "I've got a dead baby for you to biopsy." A biopsy is a test performed on tissue from a living patient. He should have said 'autopsy' - the procedure performed on a dead person to determine how they died. House, as a doctor, would know this distinction.