Abstract
If, then, we wish to reintroduce the category of substance into the set of those categories which can be justified in terms of modern knowledge, we shall have to treat it in connection with chance and irrationality, or accident. Real, objective chance means the fortuitous occurrence of just this predicate or property here and now rather than any other out of a whole host of possibles. This blue wall--why is it blue? And if we are told it had been painted we could still ask why it had been painted blue. And driving back the series of causes conceals the fortuitous element, putting the selection on some antecedent cause which in turn has an antecedent chance element, and so on in an accidental series.