In the following pages we propose a theory on cognitive systems and the common strategies of perception, which are at the basis of their function. We demonstrate that these strategies are easily seen to be in place in known cognitive systems such as vision and language. Furthermore we show that taking these strategies into consideration implies a new outlook on immune function calling for a new appraisal of the immune system as a cognitive system.

In the following pages we propose a theory on cognitive systems and the com-mon strategies of perception, which are at the basis of their function. We demon-strate that these strategies are easily seen to be in place in known cognitive sys-tems such as vision and language. Furthermore we show that taking these strat-egies into consideration implies a new outlook on immune function calling for a new appraisal of the immune system as a cognitive system.