Abstract

It is here proposed an analysis of symbolic and sub- symbolic models for studying cognitive processes, centered on emergence and logical openness notions. The Theory of logical openness connects the Physics of system/ environment relationships to the system informational structure. In this theory, cognitive models can be ordered according to a hierarchy of complexity depending on their logical openness degree, and their descriptive limits are correlated to Gödel- Turing Theorems on formal systems. The symbolic models with low logical openness describe cognition by means of semantics which fix the system/ environment relationship, while the sub- symbolic ones with high logical openness tends to seize its evolutive dynamics. An observer is defined as a system with high logical openness. In conclusion, the characteristic processes of intrinsic emergence typical of “ bio- logic” - emerging <

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