Recapitulation:
>The framework for adaptive agents consists of three major components: (1) A performance system, 2) A credit-assignment algorhythm, and (3) A rule-discovery algorhythm.

The first step in arriving at a common description of agents is to use rules as a unifying device, whatever the agent’s outward form.  This approach is called a Performance System, and consists of three criteria: The rules must use a single syntax to describe all cas agents.

The procedure for assigning strength to rules on the basis of past experience is called credit assignment.

The effectors decode standardized messages received from the performance system to cause actions in the environment, similar to an inversion of the process of detectors collecting information.  The performance system represents the internal model which receives messages from the detectors and decodes and transmits them to the appropriate effectors.  It represents the capabilities of different kinds of agents.

Observation (detectors) ? message? (Performance System)?message?action(effectors