Historical clue formulations

• Donkeyish — 2020-01-26
• Harebrained — 2018-11-10
• Totally far-fetched — 2016-01-07
• Silly — 2013-03-27
• Harebrained — 2012-09-30
• Imbecilic — 2012-08-24
• Cockamamie — 2009-02-21
• Sans sense — 2004-08-13
• Dum-dum — 2002-12-20
• Dopey — 2001-11-04
• Fatuous — 2000-09-03
• Ill-considered — 2000-02-17
• Dumb — 1998-08-01
• Brainless — 1997-07-19
• Nutty — 1995-12-30