h they are in balance. A group of stones, which do not touch one another, are not a system, because there is no interaction. A system can be modeled. Which means another system, which supposedly replicates the behavior of the original system, can be created. Theoretically, one can take a second group of stones which are the same weight, shape, and density of the first group, pile them in the same way as the first group, and predict that they w
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