Historical clue formulations

• "In what way?" — 2021-01-19
• "Why do you think that?" — 2019-03-27
• "Can you explain that further?" — 2018-11-11
• "In what sense?" — 2018-04-13
• "Care to explain?" — 2016-03-23
• "In what way?" — 2015-08-10
• "In what way?" — 2015-01-27
• "In what way?" — 2012-05-15
• "In what way?" — 2011-02-16
• Question that demands an explanation — 2009-04-16
• "Care to elaborate?" — 2006-07-05
• "In what way?" — 2006-06-02
• "In what way?" — 2003-02-04
• "Why?" — 2002-07-26
• "In what way?" — 2001-11-18
• "Want to explain that?" — 2001-11-07
• "In what way?" — 2001-08-31