Historical clue formulations

• Least in question — 2018-09-22
• Most reliable — 2013-11-17
• Most confident — 2012-08-28
• Like the best bet — 2009-10-10
• Most confident — 2009-01-13
• Superlatively decided — 2000-04-30
• Most reliable — 1999-11-28
• Optimal, as a bet — 1997-11-21
• Like the risk to bet on, maybe — 1997-09-26
• Least vacillating — 1997-08-22
• Least equivocal — 1997-04-06