In discussing the philosophical system put forward in PR, we need to point out that not only does Whitehead introduce a novel terminology, but the work itself is somewhat amorphous in character, and this despite his attempt to state a categoreal scheme — a general scheme of ideas in terms of which all our experience is to be described. There is also a considerable amount of overlap between the various parts of this book. It might have been a clearer and more effective work if Whitehead had engaged in some judicious pruning before publication.