Historical clue formulations

• "'Fraid not" — 2021-11-21
• "Absolutely, positively not!" — 2019-07-01
• "Forget about it!" — 2016-03-05
• "Ain't gonna happen!" — 2015-11-27
• "Dream on!" — 2011-06-04
• Emphatic negative — 2005-10-07
• "Forget it!" — 1998-02-20