Historical clue formulations

• It's a challenge — 2022-01-14
• It's a challenge — 2013-10-13
• "Go ahead and try!" — 2013-03-09
• Simple challenge — 2012-08-03
• Words before many a foolish act — 2010-10-29
• Famous last words? — 2005-12-09
• A challenge — 2003-01-18
• It's a challenge — 2002-08-22