 Aristotle explains his point by means of some examples that he takes to be analogous to ‘being’. Consider the terms ‘healthy’ and ‘medical’. Neither of these has a single definition that applies uniformly to all cases: not every healthy (or medical) thing is healthy (medical) in the same sense of ‘healthy’ (‘medical’). There is a range of things that can be called ‘healthy’: people, diets, exercise, complexions, etc. Not all of these are healthy in the same sense. Exercise is healthy in the sense of being productive of health; a clear complexion is healthy in the sense of being symptomatic of health; a person is healthy in the sense of having good health.