Historical clue formulations

• Unclear — 2022-08-27
• Indistinct — 2020-09-16
• Blurred — 2018-03-07
• Like recollections of people trying to avoid perjury? — 2018-02-28
• Imprecise, as a memory — 2017-11-21
• Nebulous — 2017-07-09
• Vague — 2016-02-09
• Confused — 2015-07-04
• Like some memories or summer skies — 2015-01-12
• Having a bit of smog — 2011-02-21
• Vague, as a recollection — 2009-02-01
• Unclear — 2008-09-08
• Unclear — 2007-12-14
• Having a bit of smog — 2007-01-08
• One of the three H's in a summer weather forecast — 2005-02-14
• Hard to recollect — 2003-12-03
• Like some recollections — 2002-11-22