Leibniz said with a mixture of admiration and inspiration that the Duchess Sophie of Hannover always wanted to know the reason why behind the reason why. And that is just how rationality works: it
The aim of the book is to introduce the reader to some new areas oflogic which have yet to find their way into the bulk of modern logic books written from the more orthodox direction of the mainstream
The essays included in this volume are a mixture of old and new. Three of them make their first appearance in print on this occa- sion (Nos III, IV, and V). The remaining four are based upon materials
