Historical clue formulations

• "Oh, why not!" — 2024-07-13
• "Why not!" — 2018-09-28
• "Uh-huh ... ri-i-i-ght" — 2017-07-01
• "Whatever" — 2003-11-14
• Cynic's snort #2 — 2001-02-05
• "Likely story" — 1999-04-17