You're right about YouTube. I was thinking HEVC was one of their delivery formats, but apparently not.

Netflix definitely did use HEVC for delivery of some of its high-end content at one time. Whether they still do or not, I have no idea.

Either way, the fact that people are running into error messages suggests that there is some actual customer impact.

Except that nobody who buys one of their machines is going to think, "I could pay an extra $100 and my machine would work better." They're going to think, "This piece of s**t can't even do things that my cell phone from eight years ago can do. Why did I buy this, and why should I ever buy anything from this manufacturer in the future?"

This level of penny-wise, pound-foolish behavior is a sure way to permanently lose customers.

...or decoding...

You mean like... anyone who wants to watch Netflix or YouTube or any other streaming service's high-res content?

Oh, I think I saw that YouTube video!

Generally the "even engineer dads can't make heads nor tails of it" objection is that the engineer dads didn't spend a couple minutes reading the helpfully coloured highlight box in the textbook. There has been a push in math to develop teaching methods that emphasize understanding rather than memorization. Thus 5x3 becomes 5x5x5 or 3x3x3x3x3 instead of "STFU and memorize your times tables."

A better example, also from Internet memes, is a procedure where you add or multiply a pair of larger numbers by breaking them down into component problems. 37 + 55 becomes (30 + 50) + (7 + 5) and some "parent" on Reddit or Facebook with add a comment like "why can't they just do addition like we learned??" Someone sensible will usually point out that people who are good at arithmetic will often use decomposition on harder problems if they're doing them in their head.

The teaching algorithms are pedagogical tools used to increase understanding or illustrate problems from different perspectives, not the final here's-the-algorithm-you-should-always-use".

I said that the 5x3 answer being marked wrong was likely due to a poorly educated teacher. No, primary school children probably won't be multiplying anything non-commutative soon. That was a joke. However, it is important not to instill, and then spend years reinforcing, incorrect facts. You shouldn't tell students things like "multiplication is defined as commutative" because that kind of thing will eventually screw someone up.

When I see things like "facial age verification", I have major concerns, whether we're talking about a site like Roblox (whatever that is — I don't know, and don't really care), social media, porn, or any other site. How are you going to do it without violating the privacy of every person who creates an account? And how are you going to verify that the person using the account is the person who created it without causing an even bigger privacy violation?

We do need some sort of age verification system, but we need it to be designed in a way that protects privacy. I have less than zero faith in any individual website to come up with such a system, and approximately zero faith in any individual government to do so. There really needs to be an international age verification working group that spends the next five years coming up with a system, then pressures everyone to implement it.

Doing it the other way around, with companies or governments shoveling bad, partial, or even dangerous solutions to the problem down everyone's throats, can only result in greater levels of push-back by the general public towards a proper scheme if someone ever creates it.

Sure. I think the GP's example, if it was correctly described, is probably a sign of a teacher who doesn't understand what they're teaching.

I was pointing out, educationally I hope, that the GP also doesn't really understand what they're talking about, despite claiming it's "simple." Which, incidentally, makes me suspect the anecdote may not be entirely accurate.

Or maybe they want to prepare the kids so they're not shocked when they start Clifford algebras.

They did review and change the policy. Just too late to do any good. The point is that evidence-based medicine has to be treated as a starting point for diagnosis and treatment decisions, not a rigid decision tree.

Of course, none of that makes the CDC's new claims that "vaccines don't cause autism" isn't an evidence-based statement any less absurd. You can't ever realistically prove definitively that X cannot cause Y, because that would require knowing that there exists no combination of recognizable human genetics in which X would cause Y. Evidence-based medicine would mean assuming that X cannot cause Y until evidence exists to prove that it does or can, which has not happened.

What they're doing is rejecting evidence-based medicine based on a belief that the anecdotal information they have should be taken more seriously than the broad evidence to the contrary. This would be fine if that anecdotal information were based on actual brain scans prior to vaccination that showed that the vaccine triggered a change, but it isn't. Rather, involves mistaking correlation for causation, and a post hoc ergo propter hoc fallacy, with a complete lack of any actual plausible explanation for how vaccines could cause autism beyond some vague hand-wavey pseudoscience.

And on top of that, we have a bunch of people who lack enough understanding of the scientific method and/or lack enough understanding of the subject to recognize when it is not being followed properly, and they are getting misled by charlatans with a political or personal agenda, presented in the form of pseudoscientific bulls**t papers that don't hold up to even modest scrutiny by someone with limited understanding of the subject or the scientific method, much less actual scientists in the field.

We also have a bunch of journals that publish papers outside their area of expertise, relying on outside experts that are in league with the papers' authors, and all sorts of other fun scientific fraud, which further contributes to this problem.

I'm not sure how to solve this problem, because it seems like a large percentage of the public simply lacks basic critical thinking skills and the ability to read over a paper and think, "Yes, but did you consider the following twelve common factors that could influence both the proposed cause and effect?" and realize that the paper is garbage. But a good starting point would be to pressure the news media across the political spectrum to hire actual science writers who UNDERSTAND SCIENCE to cover science-based stories.

Another good starting point would be to get more science-based shows on PBS that can talk about these issues and explain them to people and debunk bulls**t every week.

Multiplication isn't defined as a commutative operation. It happens to be so when you're multiplying real numbers but in general it is not.

Unfortunately, evidence-based medicine has become a code word for "treat everyone with the same illness identically even when the data doesn't support doing so. That's how I ended up fighting a c. diff. infection. I was hospitalized for a related condition, and the first day of antibiotics put me at no fever, but after a day, I got a fever again, and I asked if the antibiotic had changed, and they said no, but maybe the ER gave me something different. They checked, and determined that yes, I had been on a different antibiotic in the ER, but said that they should keep the current antibiotics, and used "evidence-based medicine" as the reason. I had my doubts.

They were wrong. And six months later, the general standards for treating the condition I came in with changed, and they now treat it with the antibiotic that the ER gave me instead of one of the two that the hospital put me on afterwards, precisely because the standard treatment had a tendency to make c. diff. take over.

Whoops.

So I'm all for evidence-based medicine as a starting point, but when you realize it isn't behaving normally, you should adjust accordingly. Otherwise, patients suffer enormously.

But in theory, I do agree with you that evidence-based medicine is better than evidence-free medicine based on gut feelings and assumptions that correlation means causation and other fallacious reasoning.

Fractions are difficult for lots of people. You have to understand what a fraction is before "just double the denominator" is simple and obvious. It's not a new thing. There's the story of the 1/3 pounder failing because people thought the 1/4 pounder was bigger. I have a relative who specialized in teaching remedial fractions.

It is kind of shocking that American universities are accepting large numbers of students who can't do basic math, and in programs that apparently involve calculus no less.

I'm not sure about the assertion this is a recent phenomenon when the head of state recently promised to reduce drug prices by a thousand percent.

When Google sells a 24-inch tablet, I'll care about Google being able to sell me a replacement that can do this. In the meantime, I want this feature on older, non-Google Android devices. :-)

but also in economics, with the 2008 financial crisis that was caused by a failure of the institutions that are supposed to regulate such things.

Dunno, the institutions who were supposed to regulate such things did a pretty good job here, as they did in most places that weren't the US or a specific bit of shadiness between the UK and Iceland.

Actually, I was remembering wrong there. Although TB can spread in other ways, it is primarily an airborne pathogen. So the biggest way to reduce the spread would be to add central heat and air with fresh air mixing and reduce the number of people sharing air for long periods of time. The second best way is contact tracing and prophylactic treatment.

But to add further to the comment about vaccine effectiveness, bacterial vaccines can be at least somewhat effective at preventing disease, e.g. the bacterial meningitis vaccine has something like 65% to 85% effectiveness, depending on age group and other factors, which is way better than nothing.

The TB vaccine only reduces infection risk by 20%. And when you're exposed frequently, that's barely even useful. The reason for this is that it hides from the immune system, which, as a result, takes a long time to start reacting to the bacteria, allowing it time to multiply for a while before you get a reaction. In mouse models, the reaction takes a whopping two weeks.

TB actually infects macrophages (primitive immune cells), and manages to literally hide inside them by adapting its exterior to maintain a neutral pH and by synthesizing enzymes that prevent the macrophages from maturing and that slow down apoptosis, which otherwise would release the bacteria, which would trigger T-cell activation. It's unclear whether there is a realistic way to prevent this delay.

It also plays tricks like triggering certain antigen-specific CD4+ T cells to the point of functional exhaustion while reducing antigens that would trigger other CD4+ cells so that they don't get detected. It somehow brings mesenchymal stem cells (blood vessel/lymphatic/connective tissue precursors) to the infection site, which further inhibit stem cells.

Presumably any better vaccine would have to either convince CD8+ T cells to react even without macrophages recognizing that something is wrong (perhaps by increasing the number of antigens that are included so that they are more likely to recognizing an antigen on the bacterium itself directly, early in the infection process, assuming this is even possible), convince CD4+ T cells to trigger macrophages in spite of signals to not do so, or overcome one of the design limits of the immune system (preventing T-cell exhaustion, increasing random macrophage apoptosis without an infection, etc.), some of which would likely require changing the person's DNA.

So fast diagnosis (universal health care and widespread rapid TB testing), contact tracing, etc. are critical to bringing it under control, and other prevention, such as not having large numbers of people in constant contact in areas with limited air circulation can also help. Meanwhile, vaccines, although not entirely infeasible, are likely to be more of a long shot.