Imagine we create more and more accurate dynamical systems models of a real system that contains living organisms. For example a pond with necessary external influences such that it can sustain bacteria. I assume that at some point the accuracy of the model becomes sufficient to capture the bacterium together with all properties essential to its life. In this case dynamical systems could contain life and life would become a feature exhibited by some dynamical systems. Then the question is what would the living organisms correspond to (or be represented by) within dynamical systems? More generally, what would agents (a superset of living organisms) correspond to within dynamical systems. I will discuss this question and some problems that arise. I also present an approach to solving it that employs notions from information theory.