Modal logic

Possible world

A possible world is a complete and consistent way the world is or could have been. Possible worlds are widely used as a formal device in logic, philosophy, and linguistics in order to provide a semantics for intensional and modal logic. Their metaphysical status has been a subject of controversy in philosophy, with modal realists such as David Lewis arguing that they are literally existing alternate realities, and others such as Robert Stalnaker arguing that they are not. (Wikipedia).

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What is a universe?

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From playlist Science Unplugged: Big Ideas

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Is time travel possible?

One of the most prevalent sci-fi tropes, the idea of time travel is a fascinating concept to imagine. But do the laws of physics allow for such a feat? Brian Greene explains. Subscribe to our YouTube Channel for all the latest from World Science U. Visit our Website: http://www.worldscie

From playlist Science Unplugged: Time

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If there are multiple universes, could there be copies of us in some of them?

Subscribe to our YouTube Channel for all the latest from World Science U. Visit our Website: http://www.worldscienceu.com/ Like us on Facebook: https://www.facebook.com/worldscienceu Follow us on Twitter: https://twitter.com/worldscienceu

From playlist Science Unplugged: Cosmology

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Ladder to the Stars | Cosmos: Possible Worlds

See the first laboratory on Earth - Blombos Cave. Here our ancestors conducted the first chemistry experiments. ➡ Subscribe: http://bit.ly/NatGeoSubscribe ➡ Watch all clips of Cosmos: Possible Worlds here: https://bit.ly/WatchCosmos ➡ Get More Cosmos: Possible Worlds: https://on.natgeo.com

From playlist Newest Clips | National Geographic

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Possible Teaser | COSMOS: POSSIBLE WORLDS

COSMOS is back with an all-new season! FOX and National Geographic TV’s Emmy-award winning event series returns with host Neil deGrasse Tyson in Spring 2019. The new season, COSMOS: Possible Worlds, will again delve into the cosmic revolution, profound scientific concepts and how we foun

From playlist Cosmos: A Spacetime Odyssey | National Geographic

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Are Parallel Universes Real?

Theoretical physicist Sean Carrol discusses several different ways a parallel universe could exist. One of the more popular theories is called the "many worlds" theory of quantum mechanics. In this scenario, every time an observation has several potential outcomes, there is a world where a

From playlist Space Science

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The Invisible Reality: The Wonderful Weirdness of the Quantum World

Proposed a century ago to better explain the mind-bending behavior of the smallest constituents of the universe, quantum theory has implications far beyond the atom. This rich set of laws has applications both practical and extraordinary — from the technology that has revolutionized modern

From playlist Explore the World Science Festival

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Shadows of Forgotten Ancestors | Cosmos: Possible Worlds

What makes us uniquely human? Neil deGrasse Tyson discusses the forms of heroism found in the animal kingdom outside of humans. ➡ Subscribe: http://bit.ly/NatGeoSubscribe ➡ Watch all clips of Cosmos: Possible Worlds here: https://bit.ly/WatchCosmos ➡ Get More Cosmos: Possible Worlds: https

From playlist Newest Clips | National Geographic

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George F. R. Ellis - What are Possible Worlds?

'Possible worlds' are all the ways in which a world can be. A 'world' is a complete state of cosmic affairs: all the infinite variations of innumerable parts and their myriad relationships. Possible worlds have become an indispensable philosophical technique for exploring modalities—issues

From playlist Closer To Truth - George F. R. Ellis Interviews

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How Can God Not Be Free? | Episode 1413 | Closer To Truth

Does God have real choices? Or is God bound tightly by God’s own nature? Can God do absolutely everything? Can God be ‘brave’? Can God ‘improve’? For God to be God, how can God be constrained all? Does the omnipotence paradox disrupt God? Featuring interviews with Michael Almeida, Hugh McC

From playlist Big Questions About God - Closer To Truth - Core Topic

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Arguing God from Being | Episode 807 | Closer To Truth

I'm obsessed by raw existence, which science can never explain. Does this mean that there is a God? I wish it were that simple. Yet some claim that a 'Most Perfect Being' must exist. Featuring interviews with Peter van Inwagen, Alister McGrath, Seyyed Nasr, Michael Tooley, and Alvin Plant

From playlist Big Questions About God - Closer To Truth - Core Topic

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Are Possible Worlds Real? Modal Realism Part 1 – Philosophy Tube

What are possible worlds? What does it mean to say something might have been true? Watch Part 1 of our discussion on David Lewis’ modal realism to find out! Part 2! http://tinyurl.com/pdxgkjt Metaphysics playlist: https://www.youtube.com/playlist?list=PLvoAL-KSZ32cX32PRBl1D4b4wr8DwhRQ4 S

From playlist METAPHYSICS

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Exploration: Interfacing Complexity via Worlds and Identities

From the Interactive Media & Games Seminar Series; Paul Wallace with Modern Thought & Literature at Stanford University asks Do you live in one world, or many? Do you have one identity, or do you contain multitudes? Grappling with such questions will lead us into the heart of contemporary

From playlist Interactive Media & Games Seminars FALL 2015

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Ash‘arism Encounters Avicennism: Sayf Al-Dīn Al-Āmidī (d. 631/1233) on Creation - Laura Hassan

Author’s Voice Topic: Ash‘arism Encounters Avicennism: Sayf Al-Dīn Al-Āmidī (d. 631/1233) on Creation Speaker: Laura Hassan Affiliation: Associate Faculty Member, Faulty of Oriental Studies, University of Oxford Date: December 9, 2021 Competing theories about the origins of the cosmos ha

From playlist Historical Studies

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Yujin Nagasawa - Panentheism: Is the World in 'God'?

The "search for God" leads to strange ideas. Panentheism claims that the world is in God but God is more than the world. The idea is to take from pantheism a natural order and a sacred world, and from theism a transcendent Being and higher purpose. Can this new kind of God make sense? Some

From playlist Big Questions About God - Closer To Truth - Core Topic

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Is God Necessary? | Episode 607 | Closer To Truth

Whether God exists may depend on whether God is necessary. Even if God exists, would it have been possible for God not to exist? In other words, even if God does exist, could it have been otherwise? Featuring interviews with Alvin Plantinga, Peter van Inwagen, Richard Swinburne, Bede Rund

From playlist Big Questions About God - Closer To Truth - Core Topic

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What Exists II? | Episode 1906 | Closer To Truth

What exists? What’s the ultimate stuff of reality? What’s absolutely fundamental and non-reducible — the fewest number of categories within which every specific thing, of every general kind, can be classified? Featuring interviews with Barry Loewer, David Albert, Luke Barnes, Raymond Tall

From playlist Closer To Truth | Season 19

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The Cosmic Calendar | Cosmos: Possible Worlds

The Cosmic Calendar visualizes the chronology of the universe, scaling approx. 13.8 billion years to one single year for perspective. ➡ Subscribe: http://bit.ly/NatGeoSubscribe ➡ Watch all clips of Cosmos: Possible Worlds here: https://bit.ly/WatchCosmos ➡ Get More Cosmos: Possible Worlds:

From playlist Nature & Environment | National Geographic

Related pages

Montague grammar | Intensional logic | Modal logic | Gottfried Wilhelm Leibniz | Impossible world | Logical possibility | Willard Van Orman Quine | René Descartes | Logical truth | Standard translation | Contingency (philosophy) | First-order logic | Contradiction | Saul Kripke