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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.
That highly depends on the outcome of a problem. Like you don't test much if you program a Lego car, but you do test everything very thorough if you program a satellite.
In this case the amount of testing needed to allow a killerbot to run unsupervised will probably be so big that it will never be even half done.