Logical Consequence Logical consequence is arguably the central concept of logic. The primary aim of logic is to tell us what follows logically from what. In order to simplify matters we take the logical consequence relation to hold for sentences rather than for abstract propositions, facts, state of affairs, etc. Correspondingly, logical consequence is a relation between a given class of sentences and the sentences

Justus Lipsius (1547—1606) Justus Lipsius, a Belgian classical philologist and Humanist, wrote a series of works designed to revive ancient Stoicism in a form that would be compatible with Christianity. The most famous of these is De Constantia (‘On Constancy’) in which he advocated a Stoic-inspired ideal of constancy in the face of unpleasant external events, but also carefully distinguished those parts of Stoic philosophy

Charles Darwin (1809–1882) Charles Darwin is primarily known as the architect of the theory of evolution by natural selection. With the publication of On the Origin of Species in 1859, he advanced a view of the development of life on earth that profoundly shaped nearly all biological and much philosophical thought which followed. A number of prior authors had proposed that species were not static

Metaphilosophy What is philosophy? What is philosophy for? How should philosophy be done? These are metaphilosophical questions, metaphilosophy being the study of the nature of philosophy. Contemporary metaphilosophies within the Western philosophical tradition can be divided, rather roughly, according to whether they are associated with (1) Analytic philosophy, (2) Pragmatist philosophy, or (3) Continental philosophy. The pioneers of the Analytic movement held that philosophy should begin with

Political Constructivism Political Constructivism is a method for producing and defending principles of justice and legitimacy. It is most closely associated with John Rawls’ technique of subjecting our deliberations about justice to certain hypothetical constraints. Rawls argued that if all of us reason in the light of these conditions we could arrive at the same judgment about justice. Moreover, our shared judgment about justice is

The Philosophy of Climate Science Climate change is one of the defining challenges of the 21st century. But what is climate change, how do we know about it, and how should we react to it? This article summarizes the main conceptual issues and questions in the foundations of climate science, as well as of the parts of decision theory and economics that have been brought