[orf]

> …which is proven to be impossible

For some definition of impossible, given that many systems utilise them effectively. Not all corner cases or theoretical failure modes are relevant to everyone.

[lijok]

Many systems are buggy, periodically running into corner cases that are borderline impossible to debug.

[ahoka]

Sometimes it's enough to detect these cases and reset the system to its stable state.

For example bicycle wheels are bistable systems, but they usually stay in their useful state so it does not matter in practice.

[Spivak]

Yes, and yet those systems still work and deliver real value all day every day. If every company Rollbar I've ever seen is the measure good software can have millions of faults and still work for users.