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Guessing they’ve never gone more than 31 days without an accident or they would have needed a bigger sign
The counter explodes when they try, so the problem solves itself.
Counter overrun is itself an accident, so it is always technically correct
Maybe they have already hit -15 days without incident
17 for those who are wondering.
![[Tom Gauld] Days without an accident](https://programming.dev/pictrs/image/c7992f72-0719-4083-9b56-0ef6f14c0480.webp){kind=link}