CHANGE

Change is so pervasive in our lives that it almost defeats description and analysis. One can think of it in a very general way as alteration. But alteration in a thing raises subtle problems. One of the most perplexing is the problem of the consistency of change: how can one thing have incompatible properties and yet remain the same thing? Some have held that change is a consistent process, and rendered so by the existence of time. Others have held that the only way to make sense of change is as an inconsistency.