Historical clue formulations

• Principle of improv comedy — 2026-02-28
• Basic tenet of improv — 2025-12-07
• One of the pillars of improv — 2025-07-05
• Improv tenet — 2025-04-12
• Two-word tenet of improv comedy — 2022-06-28
• Acceptance principle of improv comedy — 2022-02-13
• Collaborative principle in improv comedy — 2021-09-15
• Collaborative principle in improv comedy — 2018-10-13
• Phrase used as a basic tenet of improv comedy — 2017-08-26