Historical clue formulations

• Utter foolishness — 2026-03-19
• Bêtise — 2024-11-22
• Senselessness — 2015-01-03
• Folly — 2014-02-27
• Three Stooges display — 2013-11-15
• Opposite of brilliance — 2013-09-08
• Total nonsense — 2012-10-10
• Three Stooges specialty — 2012-07-15
• Boneheadedness — 2006-02-01
• Inanity — 2001-10-28