Historical clue formulations

• Gryffindor, Slytherin, Hufflepuff or Ravenclaw — 2021-09-05
• It's not to be believed — 2014-11-29
• Nonsense — 2014-01-14
• "Nonsense!" — 2011-02-22
• "Baloney!" — 1999-11-03
• Bunk — 1998-02-27