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It is a thesis of my ongoing research for the U.S. Army that robots not only can be better than soldiers in conducting warfare in certain circumstances, but they also can be more humane in the battlefield than humans. It is my contention that robots can be built that do not exhibit fear, anger, frustration, or revenge, and that ultimately (and the key word here is ultimately) behave in a more humane manner than even human beings in these harsh circumstances and severe duress. People have not evolved to function in these conditions, but robots can be engineered to function well in them.
Ronald C. Arkin (Thu,) studied this question.