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Cake day: June 13th, 2023

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  • I don’t know too much about this area, but I do know that this kind of task involves a bunch of complex processing in the brain. The more “Mechanical” aspects of vision could be described as visual acuity (sharpness of vision). However, gauging whether something is wonky would be a visual discrimination task, which involves more work by the brain. It’s an area in which one’s skill can be improved through learning, and some occupations have a lower discrimination threshold (I e. They can detect smaller differences).





  • Apparently the average radius of the Earth at its equator is 6,378,000m. This means that in a day, someone sitting on a couch at the equator would travel (2 * \pi * 6378,000)m, which equals 40053840m. There are around 86,400 seconds in a day, so the equatorial couch sitter travels at 464m/s (rounded to 3s.f). That’s 1040mph.

    I think the average walking speed is 3pmh. Amusingly, the mph figure I calculated above is 1037 if rounded to 4s.f. rather than 3, so the speed difference between the walker and a couch sitter is literally a rounding error.

    The conclusion here is something that everyone here already knew before I wrote this comment: it’s hard to make any sense of individual human health progress if we try to think of it on a planetary scale.


  • I know someone whose daughter is a particularly passionate teenager who enjoys going to protests. My friend long ago acknowledged the limits of forbidding his daughter from going to these things, and instead tends to go with her to protests. This openness has also had the beneficial side effect of his daughter trusting him more when he says “No, this one is too dangerous. I don’t feel comfortable with you going, even with me”. Despite trying to stay away from anything too dicey, I know there have been instances where things have escalated quicker than expected and they’ve been caught in the fray.

    These guys aren’t American, so it isn’t directly relevant here, but my point is that someone being there with their child isn’t too outlandish.









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