For restaurants, liability on outputs would mean a restaurant being liable for any food poisoning that occurs within X hours of eating there. You kind of run u

For restaurants, liability on outputs would mean a restaurant being liable for any food poisoning that occurs within X hours of eating there. You kind of run up against that old English Common Law principle that a defendant is innocent until proven guilty with that idea. In simple situations, outcomes can work. If you intentionally cause someone to die, you're guilty of murder no matter how you manage to do that (but a chain of causation still needs to be proven, a rough correlation is patently arbitrary and unjust). But complex situations where causation is complicated require standards - proving someone intentionally killed someone in traffic would be hard if there were no traffic laws.