Formerly u/CanadaPlus101 on Reddit.

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Joined 2 years ago
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Cake day: June 12th, 2023

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  • I mean, there’s all kinds of ethical philosophy out there. I don’t really deviate too far from it.

    In practice, there’s a lot that most people can agree on without too much thought, too. For example, the classical case study for how being agreeable can work against doing the right thing is how ordinary and nice a lot of Nazis were, when not being ordered into atrocities.




  • Okay, you can believe what you want, but I should clear something up: Quantum indeterminacy is not free will. It just means that there’s always residual randomness (measured by classical standards) at the smallest scales. Just going by the laws of physics there’s no obvious way for the brain to be more than a meat-based computer.




  • As I hear it described, it doesn’t even make logical sense. A thing is either random, or deterministic. People talk about decisions being motivated by something, but also somehow independent of all exterior things.

    People will come back that that lets you off the hook for your misdeeds, but that’s only the case if you believe in retribution for it’s own sake. A version of incapacitation and rehabilitation could make sense against something as devoid of “free will” as a bridge or building, and deterrence only needs the target to be capable of strategy.

    To answer the question a slightly different way, in light of the post text: How random the universe is will come down to fundamental physics. The simplest way of interpreting the current state of the art is that the universe is deterministic but branching.






  • IIRC it’s like a half or a third of the population that cheats, when research has been conducted. So, it’s normal in the sense of common. But, like others have said, your reunion people sound like were trying to convince themselves it’s normal in the sense of acceptable. And anecdotally it does tend to be the same people over and over again.

    Polyamory is also getting mentioned, but that’s a different thing, and poly people are a couple percent of the population at most with far fewer actually living the lifestyle.



  • Thanks!

    CBT and mindfulness have been great for me, actually, but there’s no way a workplace would invest as much time as it took, except maybe through a benefits program. That’s kind of where I go with a lot of these - it’s far cheaper to just do a cargo cult version. If you say there’s evidence to the contrary, though, I’ll take your word for it.



  • The thing with the former case is that basically nobody does nice things out of pure abstract altruism. Being nice can bring pleasure, be part of an identity, avoid shame and maybe boost your ego. That’s why people do it, and why they can turn around and be a monster the next moment if a new way to meet those needs becomes dominant (just open a history book). So, I wouldn’t worry too much.

    Edit: Where that leaves human kindness and relationships morally speaking is a bigger question. And given that we’ve just established how little people care about abstract things, a weirdly irrelevant one.

    This is the part where I’d normally give practical advice, if I wasn’t staring straight into the existentialist abyss. Anyway…





  • It’s “just” curvature, both through space and time. The Einstein field equation literally has energy and momentum on one side, and a type of curvature measure on the other.

    The trick there is that curved 2D spaces can already be pretty weird, and it gets exponentially crazier in dimensions 3 and 4. This makes it both capable of doing surprisingly a lot, like putting Earth in a fixed, repeating orbit without much local distortion, and difficult to visualise even by analogy. Interestingly, dimensions 5 and higher aren’t any worse, which is actually a pattern that repeats across a lot of geometry.

    In slightly more mathy detail:

    A curved 2D surface can be completely characterised by the Gaussian curvature at each point, which is a single real number (aka a scalar). In dimension 3, you need to use the Ricci curvature, which is a 3x3 matrix/tensor, so 9 scalars, and in dimension 4 it’s the Riemann curvature tensor which is 4x4x4x4. There’s symmetries that you can use to get that down to 6 and 20 scalars respectively, but that’s still a lot more parameters on every point than we’re used to.


    But yes the gravitational waves take is interesting, it burn my mind trying to imagine how to “trap” spacetime in itself.

    There is a bit of nuance there, which is why I said “as I understand it”. Gravitational waves are classically defined in terms of perturbations of flat spacetime, and a black hole is nowhere near close to flat. It’s possible there’s been work showing how to define them in that context, but I’m not a specialist and I couldn’t name it.

    If this were electromagnetism I’d just use the superposition principle, but GR is not linear. In fact, there’s chaotic dynamics that can happen in black holes related to the Mixmaster universe model. It’s also possible (to my limited knowledge) that there isn’t nice propagating waves at all so much as just adjustments to the crazy bending everything is already doing.