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The cited article references a paper by Sean M. Carroll which provides an overview of Boltzmann Brains (BB). Carroll views BBs not as a reality, but as a way to test whether a cosmological theory is plausible or not. The rule of thumb goes something like this: if the cosmological theory allows BBs then reject the cosmological theory. (page 23) We ...


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I totally agree with the scepticism already expressed by others about what Nozick is trying to say. However, I would like to take a guess at what he is driving it. He is really saying, the world we find might be the average outcome, or only averagely variant from that. So if the universe ran from some uniform initial condition like a symmetrical big bang, ...


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Giving Nozick the benefit of the doubt, he's just making up analogies between unrelated fields and name-dropping a Nobel prize-winner to justify them. This has been a popular game played by philosophers for years. See Sokal and Bricmont's book, Fashionable Nonsense, for a particularly thorough inventory of examples that are at least as breathtaking in ...


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Physics as currently taught and practiced does not explain the mind. Questions like this are outside the traditional domain of physics. It is possible for physicists and nonphysicists alike to speculate on explanations for the mind but there currently are no tools in the physicist's toolbox which would equip him or her to determine what it is.


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There is no limit to the size of a black hole, and no way for any of its contents to "leak" out of it.


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What you're talking about is metaphysics. Has there been pre-quantum philosophy of physics which was able to deal with the implications of QM? Yes. It is not 'philosophy of physics' but simply philosophy. It may be called the Perennial philosophy or non-dualism. It endorses a neutral metaphysical theory. This easily deals with QM as is explained by ...


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It's a bit unclear what you're asking, but I'll run with the part: "What do we get as observers from being in 2D rather than 1D?" I've also italicized a few things which answer the sub-questions in your question. TL;DR You get a lot of complexity with each added dimension, and that might seem nice for humans. But lots of cool things happen in just a few ...


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The OP asks whether the disciplines we call philosophy and physics (or science) arose from some more primitive philosophy that split in two. Such a position would make sense if the approach to the reality that we recognize today as science and philosophy could be found in an earlier philosophy that required splitting for them to exist separately. A. N. ...


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What's missing from the picture is entropy; the tendency toward greater entropy establishes an effective 'direction of time' that correlates with our perceived sense of time passing. We see eggs break rather than spontaneously forming from broken pieces. We can conceive of physical trajectories that would 'reform an egg' due to reversibility, but in ...


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As has been said, among other thinkers you're talking about Zeno of Alea and his paradoxes. It is the old question of how many angels can dance on the head of a pin, and it leads into the philosophical aspects of the calculus and the existential status of the 'ghosts of departed quantities'. It's a profound and rewarding area of thought with a lot of ...


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According to Wikipedia a flat universe would have this property: Zero curvature (flat); a drawn triangle's angles add up to 180° and the Pythagorean theorem holds... This is not the case for the round Earth which has positive curvature on its surface: Positive curvature; a drawn triangle's angles add up to more than 180°... The spherical objects in ...


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Drop a rock in a hole through a planet with gravity and no lava and it would go to the middle and act like a yo yo until it finally stops. It would stay in the middle. Now being its suspended, either way then would be up if it was lifted from either end. The hole would be bottomless being its open on both ends of the planet.


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