Many philosophers and scientists have claimed that time has an arrow that points in a special direction. The Roman poet Ovid may have referred to this one-way property of time when he said, “Time itself glides on with constant motion, ever as a flowing river.” However, understanding this arrow is not … Continue reading The Arrow of Time →.

Frequently Asked Questions This supplement provides background information about many of the topics discussed in both the main Time article and its companion article What Else Science Requires of Time. It is not intended that this article be read in order by section number. Table of Contents What Are Durations, Instants, Moments, and Points of … Continue reading Time Supplement →.

What Else Science Requires of Time This article is one of the two supplements of the main Time article. Table of Contents What are Theories of Physics? The Core Theory Relativity Theory Quantum Theory The Standard Model Big Bang Cosmic Inflation Eternal Inflation and the Multiverse Infinite Time 1. What are Theories of Physics? The … Continue reading What Else Science Requires of Time →.

Time Time is what clocks measure. The three key features of time are that it orders events in sequence one after the other; it specifies how long any event lasts; and it specifies when events occur. Yet despite 2,500 years of investigating time, many issues about it are unresolved. Here is a list of the […].

Zeno’s Paradoxes In the fifth century B.C.E., Zeno offered arguments that led to conclusions contradicting what we all know from our physical experience—that runners run, that arrows fly, and that there are many different things in the world. The arguments were paradoxes for the ancient Greek philosophers. Because many of the arguments turn crucially on … Continue reading Zeno’s Paradoxes →.

Philosophers are interested in a constellation of issues involving the concept of truth. A preliminary issue, although somewhat subsidiary, is to decide what sorts of things can be true. Is truth a property of sentences (which are linguistic entities in some language or other), or is truth a property of propositions (nonlinguistic, abstract and timeless entities)? The principal issue is: What is truth? It is the problem of being clear about what you are saying when you say some claim or (...) other is true. The most important theories of truth are the Correspondence Theory, the Semantic Theory, the Deflationary Theory, the Coherence Theory, and the Pragmatic Theory. They are explained and compared here. Whichever theory of truth is advanced to settle the principal issue, there are a number of additional issues to be addressed: i. Can claims about the future be true now? ii. Can there be some algorithm for finding truth – some recipe or procedure for deciding, for any claim in the system of, say, arithmetic, whether the claim is true? iii. Can the predicate “is true” be completely defined in other terms so that it can be eliminated, without loss of meaning, from any context in which it occurs? iv. To what extent do theories of truth avoid paradox? v. Is the goal of scientific research to achieve truth? Table of Contents.. (shrink)

The Liar Paradox is an argument that arrives at a contradiction by reasoning about a Liar Sentence. The classical Liar Sentence is the self-referential sentence “This sentence is false.”.

Seventh in the New Dialogues in Philosophy series, this book discusses the concept of time and shows in the simplest ways how time informs discussions about causality, creation, physics, natural disasters, and much more. Creating a series of conversations between two fictional characters, Bradley Dowden uses the characters to explore nine metaphysical issues involving time.

The Internet Encyclopedia of Philosophy was founded in 1995 for the purpose of providing detailed, scholarly information on key topics and philosophers in all areas of philosophy. Articles are peer-reviewed and blind-refereed. The IEP offers access to a keyword site search engine and is free of charge to all Internet users. It is continuously revised and updated. It had 880 articles in 2024, and it is has 6.9 million different visitors every year.

What Else Science Requires of Time This article adds to the main “Time” article and its supplements. The three most fundamental theories of physical science are the general theory of relativity, quantum mechanics, including the standard model of particle physics, and the big bang theory of cosmology. Their amalgamation is usually called … Continue reading what else →.

Frequently Asked Questions about Time This supplement provides background information about many of the topics discussed in both the main Time article and its companion article What Else Science Requires of Time. It is not intended that this article be read in order by section number. Table of Contents What Are Durations, Instants, Moments, and … Continue reading Frequently Asked Questions about Time →.

The Infinite Working with the infinite is tricky business. Zeno’s paradoxes first alerted philosophers to this in 450 B.C.E. when he argued that a fast runner such as Achilles has an infinite number of places to reach during the pursuit of a slower runner. Since then, there has been a struggle to understand how to […].