Historical clue formulations

• Certain fallacy … or what's indicated by every "sign" in this puzzle's grid — 2026-03-01
• If you criticize this puzzle, where will it end? Before long, you'll be criticizing your mother's cooking! — 2024-07-21
• *Gradual, seemingly harmless course of action that ultimately results in bad consequences — 2023-09-04
• "If we let our kids go sledding, what's next? Extreme skiing?" — 2019-12-04
• "Where does it all end?" argument — 2018-02-24