Bertrand Arthur William Russell (1872 - 1970) was a Welsh-born, British philosopher and historian. In 1950, he was awarded the Nobel Prize in Literature. In this book, the author focuses on problems to provoke a constructive discussion, concentrating on knowledge. The book has fifteen chapters: 1.Appearance and Reality 2.The Existence of Matter 3.The Nature of Matter 4.Idealism 5.Knowledge by Acquaintance and Knowledge by Description 6.On Induction 7.On Our Knowledge Of General Principles 8.How A Priori Knowledge Is Possible 9.The World of Universals 10.On Our Knowledge of Universals 11.On Intuitive Knowledge 12.Truth and Falsehood 13.Knowledge, Error, and Probable Opinion 14.The Limits of Philosophical Knowledge 15.The Value of Philosophy