What is Logic?

This is the homepage of my draft textbook, What is Logic?, as well as a repository of resources for my students taking PHIL1031 Introduction to Logic or PHIL3201 Formal & Philosophical Logic at Durham University. The DRAFT status of this book is very important: Portions of it are substantially incomplete. If, however, you find any errors, please let me know.

Recent updates:

Omnia disce, videbis postea nihil esse superfluum
--Hugh of S. Victor

This page was last updated 12 December 2018.