John Calvin (1509—1564) One can scarcely imagine a figure with a greater reputation for disapproval of philosophy than John Calvin. The French expatriate penned some of the most vitriolic diatribes against philosophy and its role in scholastic theology ever written. Thus, in one way, this reputation is rather well-earned, and an article upon Calvin in an encyclopedia of philosophy can be rather brief. However, in

The Port Royal Logic Logic or the Art of Thinking, commonly known as The Port Royal Logic, was written by Antoine Arnauld and Pierre Nicole and first published in 1662. Although it was a textbook containing much worked-over material, the Logic was extremely influential, certainly the most important textbook in logic for the next two hundred years. Part of its influence was due to its

Open Theism Open Theism is the thesis that, because God loves us and desires that we freely choose to reciprocate His love, He has made His knowledge of, and plans for, the future conditional upon our actions. Though omniscient, God does not know what we will freely do in the future. Though omnipotent, He has chosen to invite us to freely collaborate with Him in

Hans Reichenbach (1891—1953) Hans Reichenbach was a leading philosopher of science, a founder of the Berlin circle, and a proponent of logical positivism (also known as neopositivism or logical empiricism). He is known for his philosophical investigations of Einstein’s theory of relativity, quantum mechanics, the theory of probability, the nature of space and time, the character of physical laws, and conventionalism in physical science. He was

Time Travel Time travel is commonly defined with David Lewis’ definition: An object time travels if and only if the difference between its departure and arrival times as measured in the surrounding world does not equal the duration of the journey undergone by the object. For example, Jane is a time traveler if she travels away from home in her spaceship for one hour as