Historical clue formulations

• Like some skillets — 2024-07-04
• Material used for weaponry in ancient China as early as 500 B.C. — 2020-10-10
• Like some alibis and stomachs — 2012-12-08
• Club thrown in disgust? — 2012-04-01
• Inflexible, as some rules — 2008-06-15
• Not subject to change — 2005-07-30
• Not subject to change — 2003-01-09
• More than strong — 2002-07-13
• Like some stomachs — 2001-05-12
• Like some stomachs — 2000-09-15