An Enquiry Concerning Human Understanding is a philosophical work by David Hume, a Scottish philosopher who lived in the 18th century. The book discusses the limits of human knowledge and understanding, and questions the validity of many commonly accepted beliefs and ideas. Hume argues that all knowledge is derived from experience, and that we cannot know anything beyond what we have directly observed or inferred from our observations. He also explores the nature of causation, arguing that we cannot know for certain that one event causes another, but can only infer a causal relationship based on repeated observations of regularities in the world. Hume's Enquiry is considered a landmark work in the history of philosophy, and remains a seminal text in the field to this day. It is written in a clear and accessible style, making it a popular choice for students and scholars alike.Extracted from: Enquiries Concerning the Human Understanding, and Concerning the Principles of Morals, By David Hume. Reprinted from The Posthumous Edition of 1777, and Edited with Introduction, Comparative Tables of Contents, and Analytical Index by L.A. Selby-Bigge, M.A., Late Fellow of University College, Oxford.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.