Philosophy deals with the study of fundamental and general questions regarding values, mind, existence, reason, knowledge and language. Some of the major categories of philosophy are epistemology, metaphysics, value theory, ethics, logic, mathematics and science. Epistemology refers to a branch of philosophy which is concerned with the nature of knowledge, justification and the rationality of belief. Various academic disciplines such as sociology, psychology, economics and linguistics emerged out of philosophy. There are a number of methods which are used in philosophy. These include rational argument, questioning, critical discussion and systematic presentation. This book discusses the fundamentals as well as modern approaches of philosophy. Some of the diverse topics covered in this book address the varied branches that fall under this category. The extensive content of this book provides the readers with a thorough understanding of the subject.