Agent Response to Stimulus

We cannot peer into another mind; all we can do is to observe an agent's reactions to stimulus. Nonetheless, it is possible to model an agent solely by its reactions to stimulus; the agent's mind may thus be considered as some hidden internal states of little importance.

Can we predict with some certainty the future behavior of a simple agent, such as a small insect or animal? With sufficient observation of the agent in a controlled environment, it ought to be possible. We might then describe the complexity of the agent's mind by the number of factors that need to be determined before the agent's actions can be fully predicted.