Historical clue formulations

• Incorrect — 2021-02-01
• All wet — 2020-07-14
• [Bzzt!] — 2019-11-29
• Worth no points, say — 2012-09-09
• Double-cross, e.g. — 2009-11-19
• Treat unjustly — 2008-10-04
• Injustice — 2005-01-02
• Amiss — 2003-10-29
• Treat unfairly — 1995-02-24