Historical clue formulations

• Numbskull — 2025-05-05
• Idiot — 2019-01-22
• Idiot, in slang — 2018-09-23
• Jerk — 2016-08-11
• Doofus — 2015-07-27
• Klutz — 2012-07-20
• Lamebrain, in slang — 2007-04-25