Historical clue formulations

• "Indubitably!" — 2025-12-06
• Extremely — 2022-01-24
• Indubitably — 2020-05-03
• Pretty — 2015-07-10
• To a great extent — 2013-08-07
• Briton's rejoinder — 2011-09-18
• "Indubitably!" — 2007-01-24
• Truly — 2004-06-07
• Rather — 2004-05-07
• To a degree — 2004-03-24
• Pretty — 2001-06-27
• Brit's rejoinder — 1999-01-29
• Brit's reply in agreement — 1997-07-01
• So — 1997-05-30
• "Rather!" — 1995-07-16