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All these examples tell us that increased efficiency is good, and that removing friction increases efficiency. But the financial crisis, along with the activities of the Occupy movement and the criticism being leveled at Mr. Romney, suggests that maybe there can be too much of a good thing. If loans weren’t securitized, bankers might have taken the time to assess the creditworthiness of each applicant. If homeowners had to apply for loans to improve their houses or buy new cars, instead of writing checks against home equity, they might have thought harder before making weighty financial commitments. If people actually had to go into a bank and stand in line to withdraw cash, they might spend a little less and save a little mor

Finding the “mean” isn’t easy, even when we try to. It is sometimes said that the only way to figure out how much is enough is by experiencing too much. But the challenge is even greater when we’re talking about companies, because companies aren’t even trying to find the “mean.” For an individual company and its shareholders, there is no such thing as too much efficiency. The price of too much efficiency is not paid by the company. It is what economists call a negative externality, paid by the people who lose their jobs and the communities that suffer from job loss. Thus, we can’t expect the free market to find the level of efficiency that keeps firms competitive, provides quality goods at affordable prices and sustains workers and their communities. If we are to find the balance, we must consider stakeholders and not just shareholders. Companies by themselves won’t do this. Sensible regulation might.

So the real criticism embodied by current attacks on Bain Capital is not a criticism of capitalism. It is a criticism of unbridled, single-minded capitalism. Capitalism needn’t be either of those things. It isn’t in other societies with high standards of living, and it hadn’t been historically in the United States. Perhaps we can use the current criticism of Bain Capital as an opportunity to bring a little friction back into our lives. One way to do this is to use regulation to rekindle certain social norms that serve to slow us down. For example, if people thought about their homes less as investments and more as places to live, full of the friction of kids, dogs, friends, neighbors and community organizations attached, there might be less speculation with an eye toward house-flipping. And if companies thought of themselves, at least partly, as caretakers of their communities, they might look differently at streamlining their operations.

We’d all like a car that gets 100 miles to the gallon. The forces of friction that slow us down are an expensive annoyance. But when we’re driving a car, we know where we’re going and we’re in control. Fast is good, though even here, a little bit of friction can forestall disaster when you encounter an icy road. Life is not as predictable as driving. We don’t always know where we’re going. We’re not always in control. Black ice is everywhere. A little something to slow us down in the uncertain world we inhabit may be a lifesaver.

But political puritans such as Cruz and Sanders tend to make policy the way they explain the world — with unwarranted, clumsy simplicity.

Authentically believing that the whole country secretly agrees with your agenda and will join you on the barricades is not a virtue, it is a fantasy. Sincerely proposing poorly thought-out policy does not change the fact that it is poorly thought-out policy.

“I think the differences are still greater than the similarities,” he says. “Hitler was not only more intelligent, but craftier. He was not just a powerful orator, but a talented actor who succeeded in winning over various social milieus. So not just the economically threatened lower middle classes which Trump targeted, but also the upper middle classes. Hitler had many supporters in the German aristocracy.”

Trump was also democratically elected, while Hitler never had a majority vote. “He was appointed by the president of the German Reich.” Then there’s the fact that Trump does not lead a party “which is unconditionally committed to him”.

“A further obvious difference is that Trump doesn’t have a private militia, as Hitler did with the SA, which he used in his first months after coming to power to settle scores with his opponents, like the Communists and Social Democrats. You can’t possibly imagine something similar with Trump – that he’ll be locking Democrats up into concentration camps

“Finally, the American constitution is based on a system of checks and balances. It remains to be seen how far Congress will really limit Trump or if, as is feared, he can override it. It was different with Hitler, who, as we know, managed to eliminate all resistance in the shortest space of time and effectively establish himself as an all-powerful dictator. Within a few months, there was effectively no longer any opposition.”

“Hitler profited from the fact that his opponents always underestimated him,” Ullrich explains. “His conservative allies in government assumed they could tame or ‘civilise’ him – that once he became chancellor he’d become vernünftig (meaning sensible, reasonable). Very quickly it became clear that was an illusion.”

“There were many situations where he could have been stopped. For example in 1923 after the failed Munich putsch – if he’d served his full prison sentence of several years, he wouldn’t have made a political comeback. Instead, he only spent a few months behind bars, [having been released after political pressure] and could rebuild his movement.”

The western powers made the same mistake with their appeasement politics, indecision and indulgence. “In the 1930s Hitler strengthened, rather than weakened, his aggressive intentions,” Ullrich says. “So you could learn from this that you have to react faster and much more vigorously than was the case at the time.”

llrich also contends that if Hindenburg, the president of the Reich, had allowed Chancellor Brüning, of the Centre party, to remain chancellor to the end of 1934, rather than responding to pressure from conservatives to dismiss him in 1932, “then the peak of the economic crisis would have passed and it would have been very questionable whether Hitler could still have come to power”.

At the same time, Hitler’s ascent was no mere fluke. “There were powerful forces in the big industries, but also in the landowning class and the armed forces, which approved of a fascist solution to the crisis.”

If fascism “now just means aggressive nationalism, racism, patriarchy and authoritarianism, then maybe it is back on the agenda,” Bosworth continues. But today’s context is fundamentally different

Today’s “alt-right” agitators “live in a neoliberal global order where the slogan, ‘all for the market, nothing outside the market, no one against the market’ is far more unquestionably accepted than the old fascist slogan of ‘all for the state, nothing outside the state, no one against the state’”.

“What is that if it’s not racially authoritarian?” asks Schama. “If you want to call it fascist, fine. I don’t really care if it’s called that or not. It’s authoritarian, you know, ferociously authoritarian.”

Schama also points to deeply worrying messaging, such as “the parallel universe of lies which are habitual, massive, cumulative”; the criminalization of political opponents; the threat to change the libel laws against the press and the demonization of different racial and ethnic groups, going as far as proposing a Muslim registry.

Schama is clear: Trump is obviously not Hitler. “But, you know, if you like, he’s an entertainment fascist, which may be less sinister but is actually in the end more dangerous. If you’re not looking for jackboots and swastikas – although swastikas are indeed appearing – there’s a kind of laundry list of things which are truly sinister and authoritarian and not business as usual.”

Don’t ignore what people vote fo

f you’re of German heritage, it’s hard to understand how so many people could have bought Mein Kampf and gone on to vote for Hitler. Maybe no one really read it, or got beyond the first few pages of bluster, or took antisemitism seriously, you tell yourself. “Or they liked what he said,

“I think one of the mistakes this time around would be not to think that the people who voted for Trump were serious. They may have been serious for different reasons, but it would be a big mistake not to try and figure out what their reasons were.

Hitler presented himself as a “messiah” offering the public “salvation”, Ullrich points out. With austerity and hostility to the EU and to immigrants riding high, there is fertile ground for European populists next year to seduce with equally simplistic, sweeping “solutions”.

The problem, in Mazower’s view, is that establishment politicians currently have no response

“The Gestapo was piddling compared with the size and reach of surveillance equipment and operations today,

“Very belatedly, everyone is waking up to the fact that there was a general assumption that no government in the west would fall into the wrong hands, that it was safe to acquiesce in this huge expansion of surveillance capabilities, and the debate wasn’t as vigorous as it could have been.”

“Now, there is a lot of discussion about allowing this kind of surveillance apparatus in the wrong hands,” he adds. “And we’ve woken up to this a bit late in the day.”

Ullrich calls crises, “the elixir of rightwing populists”, and urges that politicians “do everything they can to correct the inequalities and social injustice which have arisen in the course of extreme financial capitalism in western countries”

Jane Caplan, a history professor at Oxford University who has written about Trump and fascism, highlights the want of “dissenting voices against marketisation and neoliberalism

The failure to resist the incursion of the market as the only criterion for political utility, or economic utility, has been pretty comprehensive.

Paranoia, bullying and intimidation are a hallmark of authoritarian regimes. They are also alive and well in our culture today, where online trolls, violent thugs at rallies, threats of expensive libel action and of course terrorist acts are equally effective in getting individuals and the press to self-censor.

“Over 100 likes is good, for me. And comments. You just comment to make a joke or tag someone.”

The best thing is the little notification box, which means someone liked, tagged or followed her on Instagram. She has 604 followers. There are only 25 photos on her page because she deletes most of what she posts. The ones that don’t get enough likes, don’t have good enough lighting or don’t show the coolest moments in her life must be deleted.

Sociologists, advertisers, stock market analysts – everyone wants to know what happens when the generation born glued to screens has to look up and interact with the world.

“It kind of, almost, promotes you as a good person. If someone says, ‘tbh you’re nice and pretty,’ that kind of, like, validates you in the comments. Then people can look at it and say ‘Oh, she’s nice and pretty.’ ”

School is where she thrives: She is beloved by her teachers, will soon star as young Simba in the eighth-grade performance of “The Lion King” musical, and gets straight A’s. Her school doesn’t offer a math course challenging enough for her, so she takes honors algebra online through Johns Hopkins University.

“Happy birthday posts are a pretty big deal,” she says. “It really shows who cares enough to put you on their page.”

He checks the phone bill to see who she’s called and how much she’s been texting, but she barely calls anyone and chats mostly through Snapchat, where her messages disappear.

Some of Katherine’s very best friends have never been to her house, or she to theirs. To Dave, it seems like they rarely hang out, but he knows that to her, it seems like they’re together all the time.

Dave Pommerening wants to figure out how to get her to use it less. One month, she ate up 18 gigabytes of data. Most large plans max out at 10. He intervened and capped her at four GB. “I don’t want to crimp it too much,” he says. “That’s something, from my perspective, I’m going to have to figure out, how to get my arms around that.”

Even if her dad tried snooping around her apps, the true dramas of teenage girl life are not written in the comments. Like how sometimes, Katherine’s friends will borrow her phone just to un-like all the Instagram photos of girls they don’t like. Katherine can’t go back to those girls’ pages and re-like the photos because that would be stalking, which is forbidden.

Or how last week, at the middle school dance, her friends got the phone numbers of 10 boys, but then they had to delete five of them because they were seventh-graders. And before she could add the boys on Snapchat, she realized she had to change her username because it was her childhood nickname and that was totally embarrassing.

Then, because she changed her username, her Snapchat score reverted to zero. The app awards about one point for every snap you send and receive. It’s also totally embarrassing and stressful to have a low Snapchat score. So in one day, she sent enough snaps to earn 1,000 points.

Snapchat is where flirting happens. She doesn’t know anyone who has sent a naked picture to a boy, but she knows it happens with older girls, who know they have met the right guy.

Nothing her dad could find on her phone shows that for as good as Katherine is at math, basketball and singing, she wants to get better at her phone. To be one of the girls who knows what to post, how to caption it, when to like, what to comment.

Katherine doesn’t need magazines or billboards to see computer-perfect women. They’re right on her phone, all the time, in between photos of her normal-looking friends. There’s Aisha, there’s Kendall Jenner’s butt. There’s Olivia, there’s YouTube star Jenna Marbles in lingerie.

The whole world is at her fingertips and has been for years. This, Katherine offers as a theory one day, is why she doesn’t feel like she’s 13 years old at all. She’s probably, like, 16.

“I don’t feel like a child anymore” she says. “I’m not doing anything childish. At the end of sixth grade” — when all her friends got phones and downloaded Snapchat, Instagram and Twitter — “I just stopped doing everything I normally did. Playing games at recess, playing with toys, all of it, done.”

Her scooter sat in the garage, covered in dust. Her stuffed animals were passed down to Lila. The wooden playground in the back yard stood empty. She kept her skateboard with neon yellow wheels, because riding it is still cool to her friends.

On the morning of her 14th birthday, Katherine wakes up to an alarm ringing on her phone. It’s 6:30 a.m. She rolls over and shuts it off in the dark. Her grandparents, here to celebrate the end of her first year of teenagehood, are sleeping in the guest room down the hall. She can hear the dogs shuffling across the hardwood downstairs, waiting to be fed. Propping herself up on her peace-sign-covered pillow, she opens Instagram. Later, Lila will give her a Starbucks gift card. Her dad will bring doughnuts to her class. Her grandparents will take her to the Melting Pot for dinner. But first, her friends will decide whether to post pictures of Katherine for her birthday. Whether they like her enough to put a picture of her on their page. Those pictures, if they come, will get likes and maybe tbhs. They should be posted in the morning, any minute now. She scrolls past a friend posing in a bikini on the beach. Then a picture posted by Kendall Jenner. A selfie with coffee. A basketball Vine. A selfie with a girl’s tongue out. She scrolls, she waits. For that little notification box to appear.

This idea seems laughable if you assume that most swing voters are fiscal conservatives and social moderates, allergic to culture-war appeals and pining for a dream ticket of Michael Bloomberg and Olympia Snowe. But as New York magazine’s Jonathan Chait has explained, there’s more than one kind of “moderate” in American politics:

There are, very roughly speaking, two kinds of swing voters. One kind is economically conservative, socially liberal swing voters. This is the kind of voter you usually read about, because it’s the kind most familiar to political reporters – affluent and college educated. But there’s a second kind of voter at least as numerous – economically populist and socially conservative. Think of disaffected blue-collar workers, downscale white men who love guns, hate welfare, oppose free trade, and want higher taxes on the rich and corporations. Romney appeals to the former, but Santorum more to the latter

his political persona is worlds away from the Washington-New York definitions of “middle-of-the-road.” But a mix of social conservatism and economic populism has a great deal of general-election potential – especially in a contest against a president whose style of liberalism can seem professorial, condescending and aloof.

a Rust Belt background would be a potential advantage for a Republican presidential candidate. But a Rust Belt background that includes an 17-point repudiation from the Pennsylvania electorate that knew Santorum best looks more like a liability instead.

both Catholicism and social conservatism are potential assets in a campaign against a president who has spoken condescendingly about Middle Americans who “get bitter” and “cling to guns or religion.” But a Catholic conservatism that manifests itself in campaign-trail critiques of contraception promises to alienate many more voters (female voters, especially) than it attracts.

All things being equal, a populist style that’s at odds with the Acela corridor’s attitudes and values can often play well in the heartland. But no presidential candidate can succeed without a modicum of favorable media coverage, and so a successful populist needs to be able to disarm elite journalists (as Huckabee so expertly did, schmoozing on The Daily Show and elsewhere) as often as he alienates them. And nobody has ever used the word “disarming” to describe Rick Santorum’s approach to politics.

That’s because the former senator has the instincts of an activist, rather than of a president or statesman.

Whether the topic is social issues or foreign policy, his zeal exceeds his prudence, and as a result his career is littered with debating society provocations (referencing “man-on-dog” sex in an argument about gay marriage, using his doomed 2006 Senate bid to educate Pennsylvanians on the evils of Hugo Chavez, etc.) that have won him far more enemies than friends. His passion for ideas and argument often does him credit, but in a national campaign it would probably do him in.

Streaming social media have an immediacy that is very different from, say, a conversation over lunch recounting the events of the previous weekend. When you see that your friends are sharing a bottle of wine without you — and at that very moment — “you can imagine how things could be different,” Professor Ariely said. It’s like a near miss in real life. “When would you be more upset?” he asked. “After missing your flight by two minutes or two hours?

“Social software is both the creator and the cure of FOMO,”

feedback, Mr. Systrom said, can be slightly addictive. People using Instagram “are rewarded when someone likes it and you keep coming back,”

“We aren’t used to seeing the world as it happens,” he said. “We as humans can only process so much data.”

as technology becomes ever more pervasive, our relationship to it becomes more intimate, granting it the power to influence decisions, moods and emotions.

“reversification” to describe the phenomenon. “I mean by it a process in which words come, through a process of evolution and innovation, to have a meaning that is opposite to, or at least very different from, their initial sense,”

applying the word “disrupt” to any behavior in people under the age of 18 is bound to involve bodily damage, psychic distress or — later on, perhaps — the buying and selling of hard drugs.

Even for adults, sharing has historically been considered a commendable activity, no matter the tangled motivations. Sharing in Internet parlance? Pure egotism. Check out my 6-year-old on the viola. Don’t you wish you were this attractive at 41?

To tag someone online is a far nastier enterprise. Anyone can resurface disparaging photographic evidence of youthful folly and post it on a social network, “tagging” it with the unsuspecting’s name.

Most people think long and hard about their favorite movie, novel, people and even color. Online, favorites are not so special. To “favorite” (now a verb) something on Twitter is to say, in effect, “I saw this thing and liked it O.K., but not enough to retweet it.” Or a tepid “I see you wrote something about me and I will acknowledge that by favoriting. But expect nothing more.”

To have something liked online is not as great as having something actually liked. It doesn’t even necessarily mean someone enjoyed it — it might simply mean, “Got it,” or more wanly, “This provoked some kind of feeling, however minor.”

Being a star in real life signifies tremendous professional success or, at the very least, celebrity; to “star” something on Gmail means you need to write back.

Last week, President Trump’s sketch of a budget underscored how little interest he has in the nation’s social insurance programs — proposing to shift $54 billion next year to the military

Republicans in the House plan to vote this week to undo the Affordable Care Act. That law was Mr. Obama’s singular contribution toward an American welfare state, the biggest expansion of the nation’s safety net in half a century.

Welfare reform did hurt many poor people by converting antipoverty funds into block grants to the states. But it was accompanied by a big increase in the earned-income tax credit, the nation’s most effective antipoverty tool today.

“No other Congress or administration has ever put forward a plan with the intention of having fewer people covered.”

Who knows where this retrenchment takes the country? Maybe attaching a work requirement to Medicaid, as conservatives propose, will prod the poor to get a job. Or perhaps it will just cut more people from Medicaid’s rolls. Further up the income ladder, losing a job will become more costly when it means losing health insurance, too.

Millions of Americans — poor ones, mainly — will use much less health care. They will make fewer outpatient visits, have fewer mammograms and cholesterol checks.

In any event, public health insurance will take a big hit.

Under the House Republican plan, 24 million more Americans will lack health insurance by 2026, according to the nonpartisan Congressional Budget Office.

Might depression and mental health problems destabilize families, feeding down into the health, education and well-being of the next generation?

Yet it is worth remembering that among advanced nations, the United States is a laggard in life expectancy and has one of the highest infant mortality rates.

If American history provides any sort of guidance, it is that continuing to shred the social safety net will definitely make things worse.

What the rise of the BRICs symbolizes to both panicked individuals in the West and optimistic ones elsewhere is a radical shift in the geography of power -- a catch-up or reversal of the Western global dominance that was established with the Industrial Revolution.

developing countries won't be able to follow the West's path to becoming rich, because that path required certain things that were largely particular to that one period in history.

The challenge ahead for the BRICs, then, is to figure out how to maintain growth in a world where the vast new frontier opened up by the Industrial Revolution appears to be closing. The BRICs can play the West's game better than the West, both through technological innovation and population growth, but only for so long. The whole world has to figure out a way of dealing with energy and agriculture.

The Vaccine article contains a number of important insights. First, the anti-vaccination cohort likes to move the goal posts: As scientists debunked the link between autism and mercury (once present in some childhood inoculations but now found mainly in certain flu vaccines), most activists dropped their mercury theory and point instead to aluminum or said that kids received “too many too soon.”

Second, it isn't clear whether scientists can "discredit" the movement's false claims at all: Its members are skeptical of what scientists have to say—not least because they suspect hidden connections between academia and pharmaceutical companies that manufacture the vaccines.

mere exposure to the current state of the scientific consensus will not sway hard-core opponents of vaccination. They are too vested in upholding their contrarian theories; some have consulting and speaking gigs to lose while others simply enjoy a sense of belonging to a community, no matter how kooky

attempts to influence communities that embrace pseudoscience or conspiracy theories by having independent experts or, worse, government workers join them—the much-debated antidote of “cognitive infiltration” proposed by Cass Sunstein (who now heads the Office of Information and Regulatory Affairs in the White House)—w

perhaps, it's time to accept that many of these communities aren't going to lose core members regardless of how much science or evidence is poured on them. Instead, resources should go into thwarting their growth by targeting their potential—rather than existent—members.

Given that censorship of search engines is not an appealing or even particularly viable option, what can be done to ensure that users are made aware that all the pseudoscientific advice they are likely to encounter may not be backed by science?

One is to train our browsers to flag information that may be suspicious or disputed. Thus, every time a claim like "vaccination leads to autism" appears in our browser, that sentence woul

The second—and not necessarily mutually exclusive—option is to nudge search engines to take more responsibility for their index and exercise a heavier curatorial control in presenting search results for issues like "global warming" or "vaccination." Google already has a list of search queries that send most traffic to sites that trade in pseudoscience and conspiracy theories; why not treat them differently than normal queries? Thus, whenever users are presented with search results that are likely to send them to sites run by pseudoscientists or conspiracy theorists, Google may simply display a huge red banner asking users to exercise caution and check a previously generated list of authoritative resources before making up their minds.

In more than a dozen countries Google already does something similar for users who are searching for terms like "ways to die" or "suicidal thoughts" by placing a prominent red note urging them to call the National Suicide Prevention Hotline.

“We have to think about social media in a new strategic way,” he said. “It is no longer something that we can ignore. It is not a place to just wish your friends happy birthday. It is a place of business. It is a place where your career will be enhanced or degraded, depending on your use of these tools and services.”

when I listen to a story, instead of reading it on a page, my memory of the book does change. I remember more of the action and less of the language

You don’t check back on previous paragraphs or read the last page first when you listen. You move forward, and what you carry with you is person and event.

I listen the way I read books as a child, as if I were there watching. The author becomes more transparent, the characters more real.

The author retorts “I really have an issue with the word hoax.” He regards himself as a performance artist. His response – “It’s the people who reported it who are deceiving their audience.”

Why is fake news so popular on newssites? Here are two reasons: first, it provides emotional “buzz.” Second, because it can make a lot of money. As the Washington Bureau chief of the Pulitzer winning Huffington Post lamented, “If you throw something up without fact checking it, and you’re the first one to put it up, and you get millions and millions of views, and later it’s proved false, you still got those views. That’s a problem. The incentives are all wrong.”Especially when, as at places like Bloomberg, remuneration is based on the number of hits an article receives. But incentives are wrong not just for news gathering organizations.

Americans continue to believe important historical “facts” that are untrue. After 9/11, Americans were incensed to hear that the many in the Middle East thought Osama bin Laden’s horrifying attack was the product of a CIA-Mossad plot. To this day, large majorities in countries like Pakistan think the massacre of 9/11 was created in Washington or Tel Aviv.

Yet close to a majority of Americans believe that Saddam Hussein, tyrant of Iraq, was in cahoots with Al-Qaeda, especially before the 9/11 attack. The Bush administration told them so.Which people in the Middle East rightly regard as preposterous.Saddam Hussein was the leader of a boldly secular, Arabist tyranny. Sunni fanatics like Al Qaeda were his regime’s blood enemies. That they would work together rather than murder each other was just insane. Welcome to the world of fict and faction.

What can we learn from this? Plausibility is not truth; when something is “too good to be true” it generally isn’t; institutions increasingly do not back up what they proclaim and sell.And the “free informational marketplace” of the Internet is a wonderful site for fraud, scams, lies, plausible lies, and pleasant, beautiful untruths. So we all need our own truth detectors.

“This certainly increases the transparency, reliability and cross-checking of proposed research findings,” he wrote.

“There seems to be a higher community standard for ‘shaming’ reputations if people step out and make claims that are subsequently refuted.” Cold fusion was a notorious example. He also saw less of an aversion to publishing negative experimental results — that is, failed replications.

Almost anything might be suspected of causing cancer, but physicists are unlikely to propose conjectures that violate quantum mechanics or general relativity. But I’m not sure the difference is always that stark. Here is how I put it my blog post:

“I have no doubt that false positives occur in all of these fields,” he concluded, “and occasionally they may be a major problem.”I’ll be looking further into this matter for a future column and would welcome comments from scientists about the situation in their own domain.

problem comes when these replications don’t occur and the information keeps spreading unchecked.

The results were similarly disturbing when students were tested to determine understanding of basic concepts. More instruction wasn't helping students advance from novice to expert. In fact, the data indicated the opposite: students had more novice-like beliefs after they completed a course than they had when they started.

But in addition, experts have a mental organizational structure that facilitates the retrieval and effective application of their knowledge.

experts have an ability to monitor their own thinking ("metacognition"), at least in their discipline of expertise. They are able to ask themselves, "Do I understand this? How can I check my understanding?"

But that is not what cognitive science tells us. It tells us instead that students need to develop these different ways of thinking by means of extended, focused mental effort.

new ways of thinking are always built on the prior thinking of the individual, so if the educational process is to be successful, it is essential to take that prior thinking into account.

. Everything that constitutes "understanding" science and "thinking scientifically" resides in the long-term memory, which is developed via the construction and assembly of component proteins.

What is elementary, worldly wisdom? Well, the first rule is that you can't really know anything if you just remember isolated facts and try and bang 'em back. If the facts don't hang together on a latticework of theory, you don't have them in a usable form.

"So it makes perfect sense," Wieman writes, "that they are not learning to think like experts, even though they are passing science courses by memorizing facts and problem-solving recipes."

Anything one can do to reduce cognitive load improves learning.

A second way teachers can improve instruction is by recognizing the importance of student beliefs about science

My third example of how teaching and learning can be improved is by implementing the principle that effective teaching consists of engaging students, monitoring their thinking, and providing feedback.

I assign students to groups the first day of class (typically three to four students in adjacent seats) and design each lecture around a series of seven to 10 clicker questions that cover the key learning goals for that day.

The process of critiquing each other's ideas in order to arrive at a consensus also enormously improves both their ability to carry on scientific discourse and to test their own understanding. [Change]

In every language, pretty much everything is metaphor—even good old “literally”, the battle-axe of those who think that words can always be pinned down precisely.

The body of educated English speakers has decided, by voice and by deed, that “literally” does mean something real in the real world. Namely, “not figuratively, allegorically”. Widespread educated usage is ultimately what determines its meaning. And perhaps that is concrete enough.

Very little of the surveillance yielded information Ikea was able to use against the targets of the data sweeps. But court documents indicate that investigators suspect that Ikea may have occasionally used knowledge of personal information to quell workplace grievances or to prompt a resignation.

In transcripts of police interviews, Mr. Paris and his colleagues in the risk management department acknowledged receiving frequent requests from Ikea store managers across France for criminal background checks, driving records and vehicle registrations — though only a fraction of those inquiries uncovered a notable offense. Usually the requests were limited to one or two people after a theft or a complaint of harassment among employees. But sometimes lists containing dozens of names of employees or job applicants were submitted for vetting, and then forwarded to one of a handful of trusted private investigators for processing.