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The original was posted on /r/todayilearned by /u/Necessary-Bath4438 on 2025-08-03 22:33:37+00:00.

Original Title: TIL that until 1827, Bachelors of Arts (BAs) students at Oxford University who sought to become Masters of Arts had to swear an oath never to be reconciled with Henry Symeonis. This practice lasted for 550 years, during which Henry’s identity remained unknown until his rediscovery in 1912.