Historical clue formulations

• Philosopher Lao-___: Var. — 2023-05-30
• Philosopher Mo-___ — 2021-08-05
• Philosopher Lao-___ — 2018-09-12
• Chinese philosopher Mo-___ — 2017-01-15
• Philosopher Lao-___ — 2016-01-17
• Philosopher Mo-___ — 2014-10-05
• Lao-___ — 2013-05-24
• Philosopher Mo-___ — 2011-09-28
• Philosopher Mo-___ — 2011-06-09
• Philosopher Mo-___ — 2008-05-02
• Philosopher Mo-___ — 2006-07-16
• Chinese philosopher Mo-___ — 2000-10-29