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Set to kill with no safety? Not a chance.
AI is so much faster than humans.

All opponents have a weakness. Gonna have to set rules that give you a fighting chance.

As far as I know few countries will permit AI to make lethal decisions. It is partly the reason most countries signed an anti-personnel landmine ban although those are more indiscriminate.

That will change as AI develops. There will be a time where soldiers and police officers are supplemented or completely replaced by robots.