Historical clue formulations

• Existentialist's inquiry — 2025-11-29
• Question at the end of a riddle — 2015-04-06
• Amnesiac's question — 2013-01-30
• End of many a riddle — 2006-02-24
• Introspective query — 2004-09-09
• End of many a riddle — 2004-02-11