tag:blogger.com,1999:blog-9124539381685751273.post3884755109014109940..comments2023-06-19T04:35:06.263-07:00Comments on Skeptic's Play: QM broke logic!millerhttp://www.blogger.com/profile/05990852054891771988noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-9124539381685751273.post-2335737437944929372012-03-13T16:44:30.622-07:002012-03-13T16:44:30.622-07:00If we take the statement "A and not-A", ...If we take the statement "A and not-A", where A is some proposition, then it is a contradiction. But if we take the statement "The cat is in state |A>+|not-A>", that is not a contradiction, because here, A is not a proposition. A is just a quantum state.<br /><br />If we take the statement "The cat is in state |A>", then this statement is simply false, and its negation is true.<br /><br /><i>"I cannot prove that all events have a causes because it's an axiom, a postulate. Axioms or postulate don't need proving."</i><br />Well if we reject that particular axiom, it obviously doesn't lead to the breaking of the rest of logic, as the video has claimed.millerhttps://www.blogger.com/profile/05990852054891771988noreply@blogger.comtag:blogger.com,1999:blog-9124539381685751273.post-17437858671838692212012-03-13T16:14:40.291-07:002012-03-13T16:14:40.291-07:00A superposition state is precisely to be in two st...A superposition state is precisely to be in two states at the same time. It's to be in the |Cat is dead> + |Cat is alive> state. Now if you set |Cat is alive>=|A> then, using the rules of QM, |Cat is dead>=|non-A>. Therefore there is a contradiction. <br />If there wasn't any contradiction, then Schroedinger Cat wouldn't be a paradox. <br /><br />I cannot prove that all events have a causes because it's an axiom, a postulate. Axioms or postulate don't need proving.kyrillukhttps://www.blogger.com/profile/03332521148281716547noreply@blogger.comtag:blogger.com,1999:blog-9124539381685751273.post-5227043281193681272012-03-13T16:02:04.084-07:002012-03-13T16:02:04.084-07:00"And this contradict logic because you cannot...<i>"And this contradict logic because you cannot be at the same time A and non-A (A bar)."</i><br />The cat is not "A and not-A". It is in a superposition state. It is not in a not-superposition state.<br /><br /><i>"To have something without cause is illogical for many people(including me)."</i><br />It does not make sense to say something is illogical "for someone". It's illogical or it isn't. I do not believe you can logically prove that all events have causes, but if you think there is a proof, by all means present it.millerhttps://www.blogger.com/profile/05990852054891771988noreply@blogger.comtag:blogger.com,1999:blog-9124539381685751273.post-34240424835026211362012-03-13T15:25:51.551-07:002012-03-13T15:25:51.551-07:00Regarding the Schroedinger Cat, it illustrate the ...Regarding the Schroedinger Cat, it illustrate the superposition principle. And this contradict logic because you cannot be at the same time A and non-A (A bar). <br /><br />To have something without cause is illogical for many people(including me).kyrillukhttps://www.blogger.com/profile/03332521148281716547noreply@blogger.comtag:blogger.com,1999:blog-9124539381685751273.post-57720128216055031862012-03-13T15:17:35.542-07:002012-03-13T15:17:35.542-07:00The guy in the video said something similar. But ...The guy in the video said something similar. But that's not right at all.<br /><br />Saying the cat is "dead and alive at the same time" is just the best way to explain QM to people who don't know the first thing about QM, and does not actually reflect any logical contradiction. Furthermore, this "problem" exists in the MW interpretation as well.<br /><br />I am not sure if QM has uncaused consequences (since the very idea of causation is <a href="http://skepticsplay.blogspot.com/2012/02/physics-and-causality.html" rel="nofollow">problematic on the QM level</a>), and in any case causation is not a law of logic.millerhttps://www.blogger.com/profile/05990852054891771988noreply@blogger.comtag:blogger.com,1999:blog-9124539381685751273.post-59263965902878643082012-03-13T14:55:56.847-07:002012-03-13T14:55:56.847-07:00Well, all depends on which interpretation of QM yo...Well, all depends on which interpretation of QM you subscribe but if you adhere to the Copenhagen Interpretation you will get some stuff that are not logical. For example that a cat can be at the same time dead AND alive. Or that consequences can arise without causes (non-determinism).Anonymousnoreply@blogger.com