Historical clue formulations

• "Yes ___!" — 2025-12-25
• Yes or no follower — 2020-12-13
• Emphatic ending with yes or no — 2019-06-30
• Yes or no follower — 2017-12-17
• "No ___, Bob!" — 2016-02-10
• "No ___, Bob!" — 2015-04-27
• Yes or no follower — 2013-05-17
• "No ___!" — 2013-02-21
• Yes or no follower — 2008-01-05
• "Yes ___, Bob!" — 2006-01-31
• Bob preceder — 2005-06-18
• Emphatic ending with yes — 2004-11-22
• Yes or no follower — 2001-10-12
• Yes or no follower — 2000-07-20
• Ending with "no" — 1999-02-13