Historical clue formulations

• Belief — 2024-04-21
• Idea — 2015-01-11
• Concept — 2014-08-07
• Mental picture — 2006-08-22
• Knickknack — 1999-06-12
• It may be crazy — 1998-10-02
• Knickknack — 1998-09-11
• Inkling — 1996-02-07