Historical clue formulations

• Say blah blah blah blah blah — 2017-11-16
• "Blah blah blah blah blah" — 2007-09-06
• Gibberish — 2006-12-30
• Gibberish — 1998-10-24
• Talk nonsensically — 1998-08-17
• Psycho talk? — 1997-04-08
• Talk idly — 1996-06-06
• Talk incoherently — 1995-08-08