Abstract
This book advocates and defends the view that there are true contradictions (dialetheism), a view that has flown in the face of orthodoxy in Western philosophy since Aristotle's time. The book has been at the centre of the controversies surrounding dialetheism ever since the first edition was published in 1987. This text contains the second edition of the book. It expands upon the original in various ways, and also contains the author's reflections on developments over the last two decades.