Historical clue formulations

• "Beats me!" — 2025-07-23
• "It's a mystery to me" — 2024-06-13
• "I'm completely at a loss" — 2024-03-19
• "Beats me" — 2024-02-29
• "Beats me" — 2023-09-24
• "Haven't the foggiest" — 2020-10-09
• "Haven't the foggiest!" — 2020-02-13
• "Who knows?!" — 2019-12-09
• "Haven't the foggiest" — 2019-11-15
• "Heck if I know" — 2018-09-06
• "Haven't the foggiest" — 2018-02-28
• "Beats me" — 2017-02-10
• "Got me" — 2016-04-22
• "???" — 2015-03-26
• "You got me there" — 2015-03-20
• "Beats me" — 2014-12-11
• "Beats me!" — 2014-06-02
• "I haven't the foggiest" — 2013-08-20
• "Haven't the foggiest" — 2013-03-17
• "Heck if I know" — 2013-01-07
• "You got me there" — 2011-12-20
• "Beats me!" — 2011-10-04
• "Beats me!" — 2011-04-12
• "Search me" — 2010-09-05
• Comment from the clueless — 2009-10-10
• "I haven't the foggiest" — 2006-09-18
• "Haven't a clue" — 2002-05-16
• "Beats me!" — 1997-03-06