Setting criteria for creating abstract concepts and the ability to establish criteria.
Most concepts are designed for human convenience, so they often diverge from reality.
쉽게 풀어쓴 양자역학과 다중우주론
이세계에선 내가 먼치킨...? 최근 이세계, 다중세계 관련된 소설과 웹툰, 애니메이션등이 인기를 끌고 있습니다. 하지만 우주 어딘가의 어떤 행성에서 또 다른내가 실재할 것 같지 않나요? 양자역학의 관점에서 해석한 다중우주론을 함께 살펴보시죠! The most elegant interpretation of quantum mechanics is the universe is constantly splitting A portion of this video was sponsored by Norton. Get up to 60% off the first year (annually billed) here: https://bit.ly/32SM0yd or use promo code VERITASIUM Special thanks to: Prof. Sean Carroll https://www.preposterousuniverse.com His book, a major source for this video is 'Something Deeply Hidden: Quantum Worlds and The Emergence of Spacetime' Code for solving the Schrödinger equation by Jonny Hyman available here: https://github.com/jonnyhyman/Quantum... I learned quantum mechanics the traditional 'Copenhagen Interpretation' way. We can use the Schrödinger equation to solve for and evolve wave functions. Then we invoke wave-particle duality, in essence things we detect as particles can behave as waves when they aren't interacting with anything. But when there is a measurement, the wave function collapses leaving us with a definite particle detection. If we repeat the experiment many times, we find the statistics of these results mirror the amplitude of the wave function squared. Hence the Born rule came into being, saying the wave function should be interpreted statistically, that our universe at the most fundamental scale is probabilistic rather than deterministic. This did not sit well with scientists like Einstein and Schrödinger who believed there must be more going on, perhaps 'hidden variables'. In the 1950's Hugh Everett proposed the Many Worlds interpretation of quantum mechanics. It is so logical in hindsight but with a bias towards the classical world, experiments and measurements to guide their thinking, it's understandable why the founders of quantum theory didn't come up with it. Rather than proposing different dynamics for measurement, Everett suggests that measurement is something that happens naturally in the course of quantum particles interacting with each other. The conclusion is inescapable. There is nothing special about measurement, it is just the observer becoming entangled with a wave function in a superposition. Since one observer can experience only their own branch, it appears as if the other possibilities have disappeared but in reality there is no reason why they could not still exist and just fail to interact with the other branches. This is caused by environmental decoherence. Schrodinger's cat animation by Ivy Tello Wave functions, double slit and entanglement animation by Jonny Hyman Filming of opening sequence by Casey Rentz Special thanks to Mithuna Y, Raquel Nuno and Dianna Cowern for feedback on the script Music from https://epidemicsound.com "Experimental 1" "Serene Story 2" "Seaweed" "Colorful Animation 4"
뜻 vs. 지시체
논리학 입문 #7 |  의미의 의미 어떤 언어적 표현이 무언가를 의미한다는 건 다시 무얼 의미할까요? 가령 '과일'은 무엇을 의미할까요? 어린아이가 과일이 무엇이냐고 묻는다면 이렇게 대답할 수 있을 겁니다. "사과, 배, 복숭아 같은 거야." 그 표현이 지칭하는 대상들을 열거하는 것이죠. 사과, 배, 복숭아 - 이것들이 바로 '과일'의 외연extension에 해당합니다.
객체지향 시스템과 패러다임 그리고 철학
자바스크립트는 왜 프로토타입을 선택했을까 라는 글을 읽고 떠오르는 내용들을 덧붙이거나 정리 해보았습니다. 원글과는 접근법이 좀 다르며, 기획이 아닌 급하게 쓴 글이라 의식의 흐름 사이에서 표류합니다 ㅠㅠㅠ 빠른요약 클래스와 프로토타입의 가장 커다란 차이는 객체 생성 방식 [클래스 -> 인스턴스 vs 객체 -> 복사된 객체]. 가장 큰 공통점은 객체지향이며, 프로그램을 객체라는 단위로 나누고 상호작용하게 하는 것.