My friend and I were having a discussion about human existence and sentience, and an interesting idea for an experiment came up. Suppose two genetically identical people of the exact same age and parentage were raised in two identical rooms seperated from all living things. There are no windows in the rooms, and the heat and light is controlled and exactly the same for both rooms. The two people are fed the exact same food at the same time by means of a chute or some other device in the wall. Would the behavior of the two people differ? Would they act exactly the same at the exact same time? Is this experiment even possible in the future? If so, would it determine the existence of souls?