Leibniz: Logic The revolutionary ideas of Gottfried Wilhelm Leibniz (1646-1716) on logic were developed by him between 1670 and 1690. The ideas can be divided into four areas: the Syllogism, the Universal Calculus, Propositional Logic, and Modal Logic. These revolutionary ideas remained hidden in the Archive of the Royal Library in Hanover until 1903 when the French mathematician Louis Couturat published the Opuscules et fragments inédits de Leibniz.

Pseudo-Dionysius the Areopagite (fl. 500 C.E.) Dionysius is the author of three long treatises (The Divine Names, The Celestial Hierarchy, and The Ecclesiastical Hierarchy) one short treatise (The Mystical Theology) and ten letters expounding various aspects of Christian Philosophy from a mystical and Neoplatonic perspective. Presenting himself as Dionysius the Areopagite, the disciple of Paul mentioned in Acts 17:34, his writings had the status of

History of African Philosophy This article traces the history of systematic African philosophy from the early 1920s to date. In Plato’s Theaetetus, Socrates suggests that philosophy begins with wonder. Aristotle agreed. However, recent research shows that wonder may have different subsets. If that is the case, which specific subset of wonder inspired the beginning of the systematic African philosophy? In the history of Western philosophy, there

The Theory-Theory of Concepts The Theory-Theory of concepts is a view of how concepts are structured, acquired, and deployed. Concepts, as they will be understood here, are mental representations that are implicated in many of our higher thought processes, including various forms of reasoning and inference, categorization, planning and decision making, and constructing and testing explanations. The view states that concepts are organized within and

Philosophy of Architecture photo of SFMOMA by David Ohmer The relation between philosophy and architecture is interrogative and propositional. It is about asking questions concerning the meaning of human habitation—what it means to live in built environs—and about evaluating plans and design projects where human flourishing and social progress can best occur—in what kinds of buildings, interior spaces and urban precincts. The following sets of

David Hume: Causation David Hume (1711-1776) is one of the British Empiricists of the Early Modern period, along with John Locke and George Berkeley. Although the three advocate similar empirical standards for knowledge,  that is, that there are no innate ideas and that all knowledge comes from experience, Hume is known for applying this standard rigorously to causation and necessity. Instead of taking the notion