An Equilibrium Model of Health

In my contribution to this volume I try to tackle the characterization problem for health and some related issues. I am concerned to find a solution to this problem which is based on well-established distinctions and on models that have been shown to be viable. An important, relevant element of this sort is the distinction between systems of actuality and systems of ideality. In order to introduce this distinction let us follow Wertheimer ([8], pp. 88–92) and consider a law to the effect that anything which has a property P also has a property Q, and we assume next that a counter-instance to the law has been found, i.e., an object which has P but lacks Q.