ABSTRACT
This chapter argues that Eudemus' proposal has merit in addressing a problem about degrees of unity and the implications these have for change. The problem of coherence becomes important at a number of points in Aristotle's discussion of change. The proposal raises a question about the kind of continuity that is supposed to obtain of natural unities. The highest degree of continuity exhibited by homoeomerous masses, depended on their having the highest possible degree of homogeneity and lacking internal boundaries. Eudemus proposes to treat to sumphues as a distinct class, more cohesive than things that are merely continuous. The degree of physical cohesion in a substance can be explained as a consequence of its continuity. The idea of an impulse or force in continua preventing scattering depends on thinking of divisibility and sharing of boundaries not only as logical properties but also as physical properties possessed in different degree and affecting the degree of internal coherence proper to the substance.
