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Cake day: June 2nd, 2023

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  • Urist@lemmy.mltoNo Stupid Questions@lemmy.worldIs this a triangle?
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    8 days ago

    It is a triangle. The abstraction of lines in non-Euclidean geometry are geodesics and just like three lines form a triangle, so do the geodesics. If you walked along the earth’s surface from the equator to the North Pole and back, taking 90 degrees angles every time, you will have felt that you made a triangle by walking straight in three directions.

    The reason the angle sum can be more than 180 degrees is that the sphere has a positive curvature. If you want one with negative curvature and less than 180 degrees angle sum, try to make one on the side of the hole on a torus (look up its curvature if my explanation was lacking).

    EDIT: Picture for reference:




  • It is nice where possible and can help locally, but on scale it will not force through any changes. To see why, we only need to consider the historical material conditions that allowed the development of the current capitalist form in the first place. Small businesses where defeated by capitalists that could employ tactics the others couldn’t answer.

    In order to answer to the consequences of our current mode of production, we have to force changes to how production is carried out. Saying we want our products locally, ethically and environmentally made will only change their branding, not the fundamental exploitation in search of surplus value.


  • When you have to spend on things like haircuts, repairs, etc, keep the money in your social network.

    While I agree with the idea of not buying garbage, there is absolutely no way we can unconsume ourselves out of the capitalist ploy to extract surplus value. Do not put the blame on people who try to (often) satisfy legitimate needs, but on those forcing labor to be spent at the cost of both the environment and workers themselves.

    Ecofascism (not accusing you here) is not going to solve the climate crisis.






  • I am pretty certain our brains evolved to filter out friendly/known voices some tens of thousands of years (or more) ago. I feel tired sometimes before and after coffee, and often less so on coffee breaks because the real issue with coffee is that the caffeine can definitely disrupt sleep.

    I understand you need consistency to not be engaged by sounds. I hope you understand that other people have other limitations, hence, again, it is your first statement I disagree with.


  • I see you repeating the claim that it makes sleeping more difficult, but I do think those that listen to sounds, be it ocean waves or someone talking, have the experience that it makes it easier for them to fall asleep.

    Sure, there can be problems with sleep quality for numerous reasons. However, making a blanket statement that this disrupts the sleep, especially of those that have positve experience with it, is going to need some factual sources (that I do not think exists).

    According to what I have read, it is fine if it is not too stimulating.

    EDIT: Also, it is easy to take a break from coffee: It only requires not drinking a few cups. Either way it does not really prevent fatigue, at most delaying it.


  • How is it bad sleep hygiene to fall asleep to noise? If it is adequately non-engaging, it is pretty much the same as other white noise. Furthermore, it really depends on each person what makes them relax.

    To paraphrase an actual sleep scientist (and not just talk out of my ass like most people do about health):

    It is easy to see know if you are getting enough sleep. If you feel tired during the day, you need more sleep.