Historical clue formulations

• "Like that's ever gonna happen!" — 2023-11-29
• "It'll never happen!" — 2017-08-23
• "I wouldn't bet on it!" — 2014-10-12
• "I wouldn't bet on it!" — 2002-01-13
• Cynic's snort #3 — 2001-02-05
• "Never!" — 1996-05-29