Introduction to fuzzy logic

A neural cell is a very complicated system, where information processing is closely related to life-sustaining processes. It is obvious now that there are a number of the molecular links between intracellular activity that keeps up the cell’s being and the process of a spike’s generation. Unfortunately, nowadays knowledge about these processes is very fragmentary and it seems unlikely that an adequate description of neuron behavior on molecular level will be formulated in the near future. Some details of neuron activity, like spike’s propagation or the mechanism of the ion channels functioning, are well understood, while others, like molecular mechanisms of a neuron’s decision-making, neuron’s memory-formation and many others are still ambiguous. In such a situation any attempt to develop “microscopic” theory of a neuron’s functioning, which will be based on concrete bio-chemical and physical processes in the neural cell, will inevitably contain too many simplifications and hardly verified assumptions. In the best case scenario, some of the assumptions can be justified a posteriori, but in most situations they remain unjustified. Moreover, in such a complexly structured system as a neural cell, different (and sometimes opposite) assumptions often lead to the same conclusions, so even a posteriori-proof assumptions remain doubtful.