Proof theory | Logical calculi | Methods of proof | Deductive reasoning
In logic and proof theory, natural deduction is a kind of proof calculus in which logical reasoning is expressed by inference rules closely related to the "natural" way of reasoning. This contrasts with Hilbert-style systems, which instead use axioms as much as possible to express the logical laws of deductive reasoning. (Wikipedia).
These are the Ocean's Protected Areas—and We Need More | National Geographic
The ocean faces many challenges, but has the extraordinary power to replenish when it is protected. Marine protected areas facilitate resilience and recovery for degraded areas of the ocean, and offer opportunities to rebuild stocks of commercially important species. Additionally, protec
From playlist News | National Geographic
Ancient Mesopotamia 101 | National Geographic
Ancient Mesopotamia proved that fertile land and the knowledge to cultivate it was a fortuitous recipe for wealth and civilization. Learn how this "land between two rivers" became the birthplace of the world's first cities, advancements in math and science, and the earliest evidence of lit
From playlist News | National Geographic
The Biggest Myth About Climate Change
Check out America Outdoors Understory on @PBS : https://youtu.be/s-R1p89zHnk We’re on PATREON! Join the community https://www.patreon.com/itsokaytobesmart ↓↓↓ More info and sources below ↓↓↓ You’ve seen it in the comment section before: “Climate change is natural. It’s happened before an
From playlist Be Smart - LATEST EPISODES!
How It's Made: Synthetic Rubber
Stream Full Episodes of How It's Made: https://www.discoveryplus.com/show/how-its-made Subscribe to Science Channel: http://bit.ly/SubscribeScience Like us on Facebook: https://www.facebook.com/ScienceChannel Follow us on Twitter: https://twitter.com/ScienceChannel Follow us on Instag
From playlist How It's Made
Rare Footage of Some of the World's Worst Natural Disasters | National Geographic
Some of the worst natural disasters ever recorded have occurred in the past century and were captured in these powerful still and moving images. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, explor
From playlist News | National Geographic
Why people get so excited about a total solar eclipse
How solar and lunar eclipses work. Become a Vox Video Lab member! http://bit.ly/video-lab Note: This is an update of a video we published in 2015. In this video we explain the differences between a solar and lunar eclipse and why some believe that a total eclipse of the sun is the great
From playlist Eclipse 2017
Foundations - Seminar 6 - Discharging hypotheses and Curry-Howard
Daniel Murfet discusses the introduction and elimination rule for implication in natural deduction, the way in which undischarged hypotheses are managed, the "identity" of natural deductions (which deductions count as "the same") and how all of this feeds into the Curry-Howard (CH) corresp
From playlist Foundations seminar
Billy Price and Will Troiani present a series of seminars on foundations of mathematics. In this seminar Billy introduces natural deduction as a proof system. You can join this seminar from anywhere, on any device, at https://www.metauni.org. This video was filmed in Deprecation (https:/
From playlist Foundations seminar
Don’t Be Fooled—These Common “Facts” Are Really Myths | National Geographic
Cleopatra wasn't Egyptian ... that and three other common myths debunked. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographe
From playlist News | National Geographic
HSC Science Extension Module 1 Induction and Deduction
HSC Science Extension Module 1 Foundations of Scientific Thinking Induction and Deduction
From playlist Y12 Sci Ex Mod 1 Foundations of Scientific Thinking
Inference: A Logical-Philosophical Perspective with Alexander Paseau
In this talk, Professor Alexander Paseau, Faculty of Philosophy, University of Oxford, will describe some of his work on inference within mathematics and more generally. Inferences can be usefully divided into deductive or non-deductive. Formal logic studies deductive inference, the obviou
From playlist Franke Program in Science and the Humanities
Floods 101 | National Geographic
No natural disaster in America has caused more death and destruction than floods. ➡ Subscribe: http://bit.ly/NatGeoSubscribe ➡ Get More 101 Videos: http://bit.ly/NatGeo101 About National Geographic’s 101 Series: Explore and experience the forces that shape the world around us. Get More N
From playlist Fun Facts | National Geographic
Introducing a Yearlong Celebration of National Parks | National Geographic
In our largest storytelling initiative to date, National Geographic is dedicating an entire year—in our print, digital, and online versions—to celebrating the wonders of parks around the world and exploring the challenges they face. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About Nationa
From playlist Nature & Environment | National Geographic
Reasoning | Introductory Astronomy Course 1.04
Welcome to Astronomy: Exploring Time and Space, a course from Professor Impey, a University Distinguished Professor of Astronomy at the University of Arizona. Learn about the foundations of astronomy in this free online course here on YouTube. This video is part of module 1, Science and Hi
From playlist Introductory Astronomy Module 1: Science and History
PrepTest 6 Game 3: Recovering from Missed Deductions // Logic Games [#23][LSAT Analytical Reasoning]
Today's game (from LSAT PrepTest 6) is an object lesson in how to recover when you miss some deductions in the setup stage of your LSAT game. Subscribe: http://bit.ly/SubTimRicchuiti | Enable ALL push notifications 🔔 One thing I try to emphasize to students is that although it's certainl
From playlist LSAT Games
Foundations S2 - Seminar 8 - Light discussion of soundness, completeness, first vs second order
A seminar series on the foundations of mathematics, by Will Troiani and Billy Snikkers. In this seminar Billy leads a discussion of soundness, completeness and first vs second-order logic, as a recap of some of what has been discussed over the past few months in the seminar. The webpage f
From playlist Foundations seminar
What if Current Foundations of Mathematics are Inconsistent? | Vladimir Voevodsky
Vladimir Voevodsky, Professor, School of Mathematics, Institute for Advanced Study http://www.ias.edu/people/faculty-and-emeriti/voevodsky In this lecture, Professor Vladimir Voevodsky begins with Gödel's second incompleteness theorem to discuss the possibility that the formal theory of f
From playlist Mathematics
6 Concepts, Judgment & Deduction of the Categories - Kant's Critique of Pure Reason (Dan Robinson)
Dan Robinson gives the 6th lecture in a series of 8 on Immanuel Kant's Critique of Pure Reason. All 8 lectures: https://www.youtube.com/playlist?list=PLhP9EhPApKE_OdgqNgL0AJX9-gwr4tmLw Empiricists have no explanation for how we move from "mere forms of thought" to objective concepts. The
From playlist Kant's Critique of Pure Reason - Dan Robinson
Arnold Beckmann: Hyper Natural Deduction
The lecture was held within the framework of the Hausdorff Trimester Program: Types, Sets and Constructions. Abstract: We introduce Hyper Natural Deduction as an extension of Gentzen's Natural Deduction system by communication like rules. The motivation is to obtain a natural deduction li
From playlist Workshop: "Proofs and Computation"
Plastics 101 | National Geographic
Once a completely natural product, much of today's plastic is man-made and largely dependent upon fossil fuels. From polymers to nurdles, learn how plastic is created and what we can do to slow the lasting repercussions this material will have on both our planet and our lives. ➡ Subscribe:
From playlist News | National Geographic