Historical clue formulations

• "You're quite right" — 2025-10-22
• "But of course!" — 2023-05-15
• "As a matter of fact, that's right" — 2022-11-23
• "Actually, I do" — 2019-12-08
• "Actually, I do" — 2015-10-11
• "Indubitably!" — 2015-09-04
• "Certainly!" — 1994-09-14