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The Pentagon is moving toward letting AI weapons autonomously decide to kill humans
(www.businessinsider.com)
This is a most excellent place for technology news and articles.
Yes there is that's the very definition of the word.
It means that the failure condition is a safe condition. Like fire doors that unlock in the event of a power failure, you need electrical power to keep them in the locked position their default position is unlocked even if they spend virtually no time in their default position. The default position of an elevator is stationery and locked in place, if you cut all the cables it won't fall it'll just stay still until rescue arrives.