Today it is assumed that the brain is a kind of pattern recognition system, with the stored patterns forming the memory contents. Individual impressions and partial elements are linked together in the brain - or rather in memory. It is characteristic of our memory that only partial aspects of a stored pattern need to be stimulated in order to complete it into a whole. An example of this is the ability of word recognition when the lower half is hidden.

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But the high ability of our brain to associate can be outsmarted, as the following example shows, which you can do yourself with another person.

          Tell the person to say the word "white" quickly several times in a row. " white, white, white, white, white, white, white, white, white, white, white, white, ........"
Then ask the person quickly "What is the cow drinking?"

The person will hopefully do how much this will do, say "milk", which is wrong. At the moment of the question, the brain, hopefully, has adopted the following association "white", "cow", "drink" and spontaneously produces the word "milk". But if you concentrate exactly and only on the question, you certainly do not say "milk". But what does a cow actually drink?

Biological networks have an enormous number of neurons. However, those who assume that the individual nerve cell works very quickly will be disappointed. The semiconductor circuits in common use today can carry out 108 switching processes in one second, whereas one neuron can only carry out about 103. It is quite obvious that the special feature of biological systems is actually to be found in the number of neurons and their networking, not their speed.