Attention : Script is not a complete representation of the oral lecture !!! 
	Script is not yet completely finished !!!
 

Looking to the behavior of human persons gives raise to many possible different views. But if one puts the focus on the central role of memory then one can ask, whether there is some general function which is fulfilled by the memory? As the following figure reveals, is some kind of storage necessary to be able to detect a change

Figure: Memory as change Detector

in the flow  events. If changes show some 'regularities' (including 'constancies') then can these phenomena only be detected if there is some 'storage of the past' which allows a 'comparison with the present'. Clearly which kinds of phenomena will be detected in the flow of events depends from 

1. the kind of features which  can be 'perceived' as present,

2. the way how present features can actively be stored, and 

3. the way, how stored features can be compared to present features

Nevertheless, from biological systems we know, that these are not only capable of  detecting   changes as such, but they can furthermore qualify changes by properties like 'having changed the location', 'having changed the color', 'happening only if condition X is fulfilled', etc.

That structure, which is made responsible for this astonishing behavior of biological systems, is called 'memory'. In the next sections we will have a look to this 'memory'.