For Russell-one of the twentieth-century's sharpest minds-philosophy should not be studied for the answers it provides but for the questions it poses and the analysis it brings to those questions. Toward this end, he sets out to address some of the most intriguing questions facing those who explore theories of knowledge and reality. During this journey Russell traverses some fascinating territory: appearance and reality, induction, knowledge of general principles, knowledge of universals, intuitive knowledge, truth and falsehood, knowledge and error, and probable opinion.