The lithic industry from the Middle Palaeolithic site of Goaréva has a mixed lithological composition. Beside flint, dolerite, a local magmatic rock, represents a third of the lithic assemblage. This lithological diversity results from an adaptation to the local palaeo-environment. Technological analysis has identified a strong similarity in the knapping process applied to each raw material. However, it is obvious that, at the point when the chips are transformed into tools, the raw material becomes a determining factor.
Life is an open system; moreover, it is classically admitted as being a complex system. Isomorphism in complex systems is examined by comparison between structural and behaviour features drawn by Forrester and the living's features. The study of the features of homologies in complex system should lead to formal laws.
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