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TIL depersonalization disorder (also known as depersonalization-derealization disorder) is a mental disorder in which the person feels detached from reality and/or their own body. The person perceives the world as foggy, dreamlike/surreal, or visually distorted.

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R5ok9 TIL the “20Q” (20 questions) handheld game, a toy released in 2003 and famous for its scary level of accuracy, actually used a basic implementation of an AI neural network. It used training data gathered from users of a web-browser based implementation of the game which launched in 1994.
oBrL8 TIL Oxford University, established in 1096AD, is older than the Aztec Civilization which emerged around 1325AD.
N0A1 TIL there is a prison for polar bears in Canada. Apparently they get chucked into jail for roaming around town.
JDZB TIL that the director of Cannibal Holocaust Ruggero Deodato was accused of actually murdering the actors in the film to make the deaths more realistic. He had them sign a contract to stay out of the media for a year to make it seem like they had truely died.
oBAMW TIL the city of Philadelphia, which was where Washington had to live when he was president, had laws in place that said any slave that lived there for more than 6 months would be freed. So, Washington set up a rotational schedule exchanging his slaves between states to prevent their freedom.