Extra Credits
Published on 16 Jun 2018In the early 19th century, people started to wonder if the Fifth Postulate couldn’t be proven at all — meaning that it could be right, but it could also be wrong. Bolyai, Lobachevsky, and Riemann started exploring hyperbolic geometry and other strange realms…
June 19, 2018
The History of Non-Euclidian Geometry – A Most Terrible Possibility – Extra History – #4
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June 14, 2018
QotD: The gender-neutral child
The media is full of excited stories heralding the revolution in children’s play. This recent headline in Time is typical: “The Next Generation of Kids Will Play With Gender Neutral Toys.” But children are not gender-neutral, and they famously resist efforts to make them so. If 40 percent of millennials think otherwise, that’s probably because they haven’t had kids yet.
Parents and teachers should certainly expose their kids to a wide range of toys and play, and teach them to accept kids who enjoy gender non-conforming toys. When toy companies rigidly classify certain toys as girl-only or boy-only, that may create a stigma against those who cross the line. Overt signage is superfluous anyway. So let’s hope other retailers follow Target’s example.
But the crusade promoted by the White House is not about tolerance for non-conformers. Its goal is to re-socialize the majority of gender-typical children toward gender neutrality. Jarret is right that it won’t be easy. With few exceptions, children are powerfully drawn to sex-stereotyped play.
Parents who read too much Judith Butler in college and view gender as fluid and malleable may be startled by the counterevidence their three-year-olds provide. The usually eloquent Julia Turner, editor of Slate, became tongue-tied a few weeks ago when she tried to explain a mysterious development at home: Her little twin sons were obsessed with wheeled objects — particularly cement mixers. Parenthood, she confessed, had “complicated” her worldview. Turner kept affirming her loyalty to the gender-is-a-social-construct school. But then, referring to her sons’ insistent boyishness, she uttered four heretical words: “There’s a there there…”
Indeed there is. And it takes a liberal arts degree not to see it. A 2012 cross-cultural study on sex differences confirmed what most of us see: despite some exceptions, females tend to be more sensitive, esthetic, sentimental, intuitive, and tender-minded, while males tend to be more utilitarian, objective, unsentimental, and tough-minded.
The female penchant for nurturing play and the male propensity for rough-and-tumble hold cross-culturally and even cross-species. Among our close relatives such as rhesus and vervet monkeys, researchers have found that females play with dolls far more than do their brothers, who prefer balls and toy cars. It seems unlikely the monkeys are acting out a culturally manufactured gender binary. Something else is going on. Most scientists attribute typical male/female differences to some yet-to-be understood combination of biology and culture.
Christina Hoff Sommers, “Those Who Push For Toy Neutrality Don’t Get Little Girls At All”, The Federalist, 2016-09-11.
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June 12, 2018
Conformity
An eminent professor signed an open letter he didn't believe: @WSJopinion pic.twitter.com/maP3cGs5z1
— W Bradford Wilcox (@WilcoxNMP) June 8, 2018
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June 11, 2018
The History of Non-Euclidian Geometry – Squaring the Circle – Extra History – #3
Extra Credits
Published on 9 Jun 2018Euclidean geometry eventually found its way back into Europe, inspiring René Descartes to create the Cartesian coordinate system for maps, and Isaac Newton to invent calculus. Both these tools helped humanity understand the world better.
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June 6, 2018
QotD: When the “Right Stuff” becomes “old school”
Consider the popular conception of firefighters: brave, selfless, strong enough to haul an incapacitated person from a burning building.
A few years ago, at a conference, I learned that many women were failing to qualify as firefighters, because they were coming up short on the strength test. What was so interesting, though, was that in practice, it turns out that one of the most important skills a firefighter needs is not so much the strength to drag an unconscious person from a building, but, far more commonly, the ability to coax someone who’s in danger and is terrified to come with them. Apparently, many women turn out to be far more persuasive than men – highlighting the importance of selection based on real-world skills, rather than legacy stereotypes.
Space flight offers another striking example of this phenomenon. In the context of a recent Tech Tonics podcast interview with Dorit Donoviel, director of the Biomedical Innovations Laboratory at the Center for Space Medicine at Baylor College of Medicine, I had told Dr. Donoviel about my lifelong interest in astronomy and space, about launching Estes rockets and my love of the National Air and Space Museum and above all, about my affection for the heroism captured in the movie The Right Stuff, an all-time favorite.
In response, she laughed, and told me how “old school” that thinking was. When the space program started out, she explained, there was an exceptional degree of risk involved, and astronauts tended to be selected from the ranks of fighter pilots – because, in her words, they had “the skill sets and the cojones.” But today, she said, things are different – in large measure because the “space program is a lot safer than it used to be.”
Consequently, Donoviel explained, “Today what we’re looking for is less of the sort of alpha-male pilots, and more of the sort of scientists and engineers, geologists and earth scientists, folks who can work together in a cohesive manner in a team.”
Moreover, she added, the astronaut of the future needs to be able to endure long periods of boredom and the prolonged lack of stimulation – in many ways, the opposite of high-adrenaline “seat-of-the-pants flying” that in some ways characterized the early astronaut missions.
In space travel, as in firefighting, our notion of what constitutes the right skill set has evolved appreciably.
David Shaywitz, “Evolving Notions Of The Right Stuff — In Spaceflight And In Medicine”, Forbes, 2016-09-20.
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June 4, 2018
The History of Non-Euclidian Geometry – The Great Quest – Extra History – #2
Extra Credits
Published on 2 Jun 2018For hundreds of years, Euclid’s geometry disappeared with the fall of the Roman Empire. But in Constantinople, Islamic mathematicians, including Al-Khwarizmi (who gave us the word “algebra”) worked long and hard on proving the Fifth Postulate.
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June 2, 2018
QotD: The Dunning-Kruger Effect
In the early hours of April 20 1995, police knocked on the door of McArthur Wheeler and arrested him for holding-up two Pittsburgh banks the previous day. Wheeler could hardly have been surprised that the police were on to him: wearing no mask or disguise, he had ambled into the banks during business hours and brandished a gun in full view of security cameras. Nevertheless, he was astonished, protesting “but I wore the juice!” Wheeler had formed the erroneous belief that lemon juice rendered people invisible on video.
Wheeler is now a legend in psychology, since it was his regrettable escapade that inspired two psychologists, David Dunning and Justin Kruger, to figure out whether we have a good sense of our own strengths and weaknesses. Dunning and Kruger set tests of grammar, logic and even having a sense of humour to a group of undergraduates. Then they asked them how they stacked up to others in the group. Was their grasp of logic and grammar better or worse than average? Were they better able than other students to distinguish funny from unfunny jokes?
Most students thought that they were above-average logicians, grammarians and wits but the Dunning-Kruger effect is not mere overconfidence. The competent people in the study had a reasonable grasp of where they stood in the pecking order. The incompetent ones were blissfully unaware of their incompetence. The good students knew that they were good; the bad students had no clue that they were bad.
Perhaps because Dunning and Kruger opened their 1999 research paper with the story of McArthur Wheeler, the Dunning-Kruger effect has now become a popular insult in some corners of the internet. We chuckle at people who are far too stupid to know that they are stupid. Unfortunately, such mockery misses the subtlety and universality of the effect. All of us are incompetent in some areas. When we stray into them, the Dunning-Kruger effect may be lurking.
The fundamental problem is a person trying to diagnose his own incompetence is — almost by necessity — likely to be missing the skills needed to make that diagnosis. Not knowing much grammar means you’re poorly placed to diagnose your ignorance of grammar.
Tim Harford, “Can trivia help us to be less ignorant of our own ignorance?”, TimHarford.com, 2016-09-06.
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June 1, 2018
Pushing back the beginnings of life on Earth
In Wired, Rebecca Boyle discusses the fossil record of life and how recent discoveries keep moving the date further and further back in Earth’s history:
In the arid, sun-soaked northwest corner of Australia, along the Tropic of Capricorn, the oldest face of Earth is exposed to the sky. Drive through the northern outback for a while, south of Port Hedlund on the coast, and you will come upon hills softened by time. They are part of a region called the Pilbara Craton, which formed about 3.5 billion years ago, when Earth was in its youth.
Look closer. From a seam in one of these hills, a jumble of ancient, orange-Creamsicle rock spills forth: a deposit called the Apex Chert. Within this rock, viewable only through a microscope, there are tiny tubes. Some look like petroglyphs depicting a tornado; others resemble flattened worms. They are among the most controversial rock samples ever collected on this planet, and they might represent some of the oldest forms of life ever found.
Last month, researchers lobbed another salvo in the decades-long debate about the nature of these forms. They are indeed fossil life, and they date to 3.465 billion years ago, according to John Valley, a geochemist at the University of Wisconsin. If Valley and his team are right, the fossils imply that life diversified remarkably early in the planet’s tumultuous youth.
The fossils add to a wave of discoveries that point to a new story of ancient Earth. In the past year, separate teams of researchers have dug up, pulverized and laser-blasted pieces of rock that may contain life dating to 3.7, 3.95 and maybe even 4.28 billion years ago. All of these microfossils — or the chemical evidence associated with them — are hotly debated. But they all cast doubt on the traditional tale.
As that story goes, in the half-billion years after it formed, Earth was hellish and hot. The infant world would have been rent by volcanism and bombarded by other planetary crumbs, making for an environment so horrible, and so inhospitable to life, that the geologic era is named the Hadean, for the Greek underworld. Not until a particularly violent asteroid barrage ended some 3.8 billion years ago could life have evolved.
But this story is increasingly under fire. Many geologists now think Earth may have been tepid and watery from the outset. The oldest rocks in the record suggest parts of the planet’s crust had cooled and solidified by 4.4 billion years ago. Oxygen in those ancient rocks suggest the planet had water as far back as 4.3 billion years ago. And instead of an epochal, final bombardment, meteorite strikes might have slowly tapered off as the solar system settled into its current configuration.
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May 31, 2018
QotD: Difficulties in using self-reported data
Nick Cohen, over in the Guardian, is busy telling us all that we must drink less and that Scotland raising the minimum price of alcohol (hitting poor people’s cheap cider and bargain booze, but not directly affecting craft lagers, appellation d’origine contrôlée wines and artisan gin) is a Good Thing because the industry makes its profits by exploiting addicts who are drinking themselves to death en masse.
It is a truth universally unacknowledged that, like drugs cartels, the drink industry makes most of its money from addicts. It thrives on hooked customers, who put boosting the brewers’ profits before their and their families’ health and happiness. Sixty per cent of alcohol sales – worth £27bn a year in England – are to “increasing risk” drinkers taking more than 21 units of alcohol a week, in the case of men (about 10 pints or two bottles of wine), and “harmful” drinkers taking more than 50… Twenty one units (14 for women) does not sound much in my world of journalism, but it is a sign of people who cannot go a day without a shot of their drug, which is as good a definition of an addiction as any.
Now, there’s a question there about who decided what that “risk” was and how large it was. Cohen gets into the Salvation Army-style temperance-league apocalyptic warnings about the horrors of heavy drinking and warns that by the time you’re knocking back fifty units a week (for men, thirty-five for women) you’re undergoing “full degeneration”.
But is that based on any firm evidence? One interesting study, reassuring to the toper, can be found here, which among other things makes the gentle point that since we either under-report what we consume, or we pour away half of the booze we buy undrunk, planning policy on what we admit to consuming may not be accurate.
Jason Lynch, “How Much Is ‘Too Much’?”, Continental Telegraph, 2018-05-08.
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May 29, 2018
The History of Non-Euclidian Geometry – Sacred Geometry – Extra History – #1
Extra Credits
Published on 26 May 2018Before we get into non-Euclidian geometry, we have to know: what even is geometry? What’s up with the Pythagorean math cult? Who was Euclid, for that matter? And what the heck is the 5th Postulate?
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“[T]here’s just no way that we’re going to get to fentanyl harm reduction without [legalization]”
Tim Worstall reports on a recent Nebraska drug bust involving enough fentanyl “to kill 26 million people” (that is, about 120 lbs of the stuff) and explains why the current enforcement regime is going to have to change:
Now, I’m in favour of all of these drugs being legalised anyway. It’s the idiot’s body, up to them what they ingest in whatever manner. If it kills them, well, their choice. The argument that they shouldn’t therefore we must prevent them doesn’t cut much ice with me.
But put that aside and think in a utilitarian manner. If we can prevent overdoses and wasted lives then we should. But only if how we’re going to do it is better than the results of either not doing so or even using some other manner of dealing with the problem.
It’s arguable that clamping down on certain illegal drugs does at least limit their penetration of the market. I don’t think this is true of heroin but perhaps it is potentially true. It’s absolutely not true of fentanyl. For that’s a synthetic opioid. A decent chemist can synthesise it – a good one can make the precursors as well. There is no need to get opium, morphine or any other poppy related product that we already control.
It’s also, as we can see, alarmingly cheap already. Easy to smuggle in vast quantities of doses.
There’s another problem with it. The difference between a dose that gives a high and one that kills is pretty narrow. And it’s an extremely potent drug as well. Quantities for either are small – smaller than can generally be measured by users with candles and teaspoons.
It’s cheap, easy enough to make, has no precursors we can control, kills easily enough and dosage is alarmingly difficult to get right. So, what do we do?
We’re not going to get rid of it for all of the above reasons. So, we need to do damage limitation. Stopping people from dying from it sounds like a pretty good idea actually. And that means that we need it to be pure and in known dosages. That is, we need it to be legal.
I think all drugs should be legal, hey, your body and all that. But even if you think that harm reduction is a more important goal there’s just no way that we’re going to get to fentanyl harm reduction without legality of it. For that’s the only way we will get it in known doses which don’t kill people. And we’re most assuredly going to keep getting it even if we don’t legalise it. Our choices are people tooting on illegal fentanyl and dying or people tooting on legal fentayl and not dying. Not such a toughie that question, is it?
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May 27, 2018
QotD: Epicurus on the ethics of pleasure
Epicurus begins with the question asked by Socrates at the end of the fifth century — what is the good life? His answer is that the good lies not in virtue or justice or wisdom — though these are not to be ignored — but in happiness.
“Pleasure” he writes, “is our first and kindred good. It is the starting point of every choice and every aversion, and to it we come back, inasmuch as we make feeling the rule by which to judge of every good thing.”
Now we have more than enough of Epicurus to know that he is not arguing for what are called the self-indulgent pleasures — of eating and drinking and sex and the like. Aristippus of Cyrene (c435-366 BC), we are told, had already argued for these. He also claimed that happiness was the highest good, but went on to claim that happiness lay in the pursuit of pleasure regardless of convention or the feelings of others or of the future.
This interpretation was attached to Epicurus in his own lifetime, and the attachment has been maintained down to the present — so that the words “Epicure” and “Epicurean” have the meaning of self-indulgent luxury.
What Epicurus plainly means by happiness is the absence of pain. We are driven to act by a feeling of discontent. We seek food because we are hungry. We seek warmth because we are cold. We seek medicine because we are sick. Once we have acted correctly and removed the cause of discontent, we are happy.
Turning to his own words, he says:
When we say… that pleasure is the end and aim, we do not mean the pleasures of the prodigal or the pleasures of sensuality, as we are understood to do by some through ignorance, prejudice or wilful misrepresentation. By pleasure we mean the absence of pain in the body and of trouble in the soul. It is not by an unbroken succession of drinking bouts and of revelry, not by sexual lust, nor the enjoyment of fish and other delicacies of a luxurious table, which produce a pleasant life; it is sober reasoning, searching out the grounds of every choice and avoidance, and banishing those beliefs through which the greatest tumults take possession of the soul. Of this the beginning and the greatest good is wisdom. Therefore wisdom is a more precious thing that even philosophy; from it springs all the other virtues, for it teaches that we cannot live pleasantly without living wisely, honourably and justly; nor live wisely, honourably and justly without living pleasantly.
In this scheme, therefore, happiness is to be defined as peace of mind, or ataraxia. This pursuit of happiness does involve bodily pleasure, but such pleasure is a means to the greater end of ataraxia. “No pleasure” he says, “is a bad thing in itself, but the things which produce certain pleasures entail disturbances many times greater than the pleasures themselves.”
His ethics of pleasure can be summarised as:
The pleasure which produces no pain is to be embraced. The pain which produces no pleasure is to be avoided. The pleasure is to be avoided which prevents a greater pleasure, or produces a greater pain. The pain is to be endured which averts a greater pain, or secures a greater pleasure.
And so the happy man for Epicurus is one who lives simply within his means, who seeks only those pleasures which contribute to his long term peace of mind.
And while hedonism is ultimately a doctrine of selfishness, what Epicurus had in mind was not a life spent in the pursuit of solitary happiness. He says: “Of the means which wisdom acquires to ensure happiness throughout the whole of life, by far the most important is friendship.”
It may be that we seek friendship for selfish reasons. But friendship is to be persistently sought and maintained throughout life. Epicurus himself had an immense capacity for friendship.
Sean Gabb, “Epicurus: Father of the Enlightenment”, speaking to the 6/20 Club in London, 2007-09-06.
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May 25, 2018
Progressives: “Gender is a social construct!” Science: “Wait just a second there…”
Toby Young wonders why a woman can’t be more like a man:
A fascinating paper about sex differences in the human brain was published last week in the scientific journal Cerebral Cortex. It’s the largest single-sample study of structural and functional sex differences in the human brain ever undertaken, involving over 5,000 participants (2,466 male and 2,750 female). The study has been attracting attention for more than a year (see this preview in Science, for instance), but only now has it been published in a peer-reviewed journal.
For those who believe that gender is a social construct, and there are no differences between men and women’s brains, this paper is something of a reality check. The team of researchers from Edinburgh University, led by Stuart Ritchie, author of Intelligence: All That Matters, found that men’s brains are generally larger in volume and surface area, while women’s brains, on average, have thicker cortices. ‘The differences were substantial: in some cases, such as total brain volume, more than a standard deviation,’ they write. This is not a new finding – it has been known for some time that the total volume of men’s brains is, in general, larger than that of women’s, even when adjusted for men’s larger average body size – but all the studies before now have involved much smaller sample sizes.
Does this paper have any implications when it comes to men and women’s intellectual abilities? The answer is yes, but they’re not clear cut.
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May 20, 2018
Vancouver is the latest jurisdiction to fall for bogus statistics originated by a 9-year-old
Christian Britschgi at the Reason Hit & Run blog:
Plastic straw bans — much like the waste they target — are spreading across the globe, polluting city councils and national parliaments alike with environmentalist movement’s good intentions and undegradable bogus statistics.
The latest to fall is the Canadian city of Vancouver, which this week passed a prohibition on single-use plastic straws, as well as on foam cups and containers. The new law will forbid licensed food servers from giving away these items starting June 1, 2019.
The politicians who passed the latest straw ban are pretty pleased with their planet-saving efforts.
“This is a really important step forward to demonstrate how serious we are in phasing out plastics and making sure we are working aggressively towards zero waste,” said Vancouver Mayor Gregor Robertson in reference to the city’s goal of eliminating waste and litter by 2040.
Other stakeholders were less than celebratory about the new ban.
“The stifling effect of this ban on innovation is very serious,” Joe Hruska of the Canadian Plastic Industry Association announced in a press release. “This ban will do nothing to reduce the amount of material going to landfill or solve the public bin recycling and litter issues.”
[…]
In justifying Vancouver’s straw ban, city officials relied on the same discredited figures used to push similar prohibitions in the United States. The city’s “Single-Use Item Reduction Strategy” states that Canadians collectively throw away 57 million straws a day. A footnote explains that this number is based on the 500 million straws a day Americans use, adjusted for Canada’s population. The footnote provides a link to the recycling company Eco-Cycle, which has popularized this figure.
As Reason reported in January, Eco-Cycle itself got the 500 million straws a day figure from 9-year-old Milo Cress, who surveyed three straw manufacturers to get their estimations of the size of the straw market. Market analysts put daily straw usage in the United States closer to 175 million.
Assuming the same per capita consumption north of the border, that would mean that Canadians toss about 19 million straws a day.
Environmentalists might still find that figure too high, given how much plastic is dumped into the ocean each year. Still, it is worth noting that the vast majority of plastic waste getting into the world’s waterways is not coming from rich countries with well-developed waste control systems. It comes instead from the world’s poor, coastal countries. According to a 2015 study published in the journal Science, anywhere from 4.8 million to 12.7 million tons of plastic entered the ocean in 2010. China was the largest polluter, responsible for about 28 percent of all that waste. The United States was a distant 20th, responsible for about 1 percent of plastic marine debris in 2010. Canada, according to the study’s dataset, ranks 112th, sending about .02 percent of global marine debris into the ocean.
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May 16, 2018
Why Hawaii’s volcano is so UNUSUAL
Physics Girl
Published on 16 Mar 2017Hawaii is known for its volcanoes, but most volcanoes on earth exist along tectonic plate lines. Hawaii does not! What causes Hawaii to form, and how is it related to the mystery of a magnetic bar code across the Pacific Ocean? Host Dianna Cowern chatted with geologist Noah Randolph-Flagg from UC Berkeley while hiking on the island of Kauai.
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