Turing Uncomputability

Jørgen Veisdal in Privatdozent:

As Soare (2013) recounts, John von Neumann (1903–1957) happened to be in the audience as a representative of Hilbert’s program when Gödel, then 25 years old, took the podium to present his result. von Neumann immediately recognized that Hilbert’s program was over, and spent the next weeks preparing the proof of a related theorem. He had in mind an arithmetization of Gödel’s incompleteness result, to show that not only are formal systems incapable of proving every statement in them, they are also unable to guarantee proofs of their own consistency. He later presented his proof to Gödel, writing “using the methods you employed so successfully […] I achieved a result that seems to me to be remarkable, namely, I was able to to show that the consistency of mathematics is unprovable” (Dyson, 2005). Writing back, Gödel reportedly politely thanked the great man and informed him that he himself (Gödel) had written the same proof weeks earlier, and that it had already been submitted for publication.

More here.

Beyond Neoliberal Trade

Arjun Jayadev and J. W. Mason in the Boston Review:

In the wreckage of World War I, it was hard to imagine a return to this borderless “economic Eldorado.” But today, it’s the relatively self-contained national economies of the mid-twentieth century that may seem like a lost world. To access the products of the whole earth, you don’t even have to pick up the phone; you can just log onto Amazon.

This return to—and surpassing of—prewar levels of economic integration has been paralleled by a revival of pre-Keynesian ideas about the international economy. The vast expansion of international trade over the past forty years is often presented as the result of simply removing artificial constraints—that is, as a victory of “free trade” over “protectionism,” a realization of the cosmopolitan and liberal ideals of the nineteenth century after the aberrant nationalism and state direction of the economy of the twentieth. This victory is often claimed as one of the great successes of the neoliberal era, one whose benefits are so obvious as to hardly need stating. One of us recently attended a panel on trade at a meeting of the American Economic Association, where the chair opened the discussion by saying, “Obviously, if you are in this room then you are for free trade, as much as we can get.” No one in the room seemed to disagree.

More here.

On Didion’s “Let Me Tell You What I Mean”

Elroy Rosenberg at 3:AM Magazine:

Naturally, there is something contradictory to be found in the emphasis on the “I” in Didion’s work and the supposed “sublime neutrality” which she represents. Considering the omnipresence of the former, the latter seems more or less unattainable. For many Didion readers, who simply cannot shake free of the need to label no matter how hard they wriggle, this paradox might seem unimportant. For me, it is the crux of her work, highlighted in her new collection of essays, Let Me Tell You What I Mean. Encapsulating many pieces from Didion’s emergence with her ‘Points West’ column which she shared with her husband, John Gregory Dunne, as well as later work for establishments like the New York Times Magazine and New Yorker, the collection is a continuation of Didion’s lifelong search for that meagre, almost incommunicable slice of the world where subjectivity and transparency live together hand in hand.

more here.

The Novels of Gwendoline Riley

Emma Garman at The Paris Review:

In 2007 Gwendoline Riley, then age twenty-eight and already the author of three acclaimed novels, described her writing life as lacking “any tremendous triumph or romance—I feel like I’m just always trying to be accurate, to get everything in the correct proportion.”

As literary aspirations go, it sounds modest. And by superficial measures, Riley’s novels are unambitious: light on conventional plotting, narrow in scope, and told from the perspectives of women close to herself in age and background. Riley has tried using the third person, she said in 2012, but it “always sounds so false.” As for adopting a male point of view: “Ugh, men’s brains! That vipers’ nest? No.” Her protagonists are writers, too, encouraging the frequent assumption that she draws directly from life. But to regard Riley’s fiction as titivated memoir is to misperceive what beguiles her readers: not barely mediated personal experience but its sedulous transmutation by a strange, rare talent. As Vivian Gornick wrote after reading the letters of Jean Rhys, a novelist with whom Riley shares some kinship: “The letters are the life, and the novels—there’s no mistaking it—are the magic performed on the life.”

more here.

Friday Poem

Fishing on the Susquehanna in July

I have never been fishing on the Susquehanna
or on any river for that matter
to be perfectly honest.

Not in July or any month
have I had the pleasure — if it is a pleasure —
of fishing on the Susquehanna.

I am more likely to be found
in a quiet room like this one —

a painting of a woman on the wall,

a bowl of tangerines on the table —
trying to manufacture the sensation
of fishing on the Susquehanna.

There is little doubt
that others have been fishing
on the Susquehanna,

rowing upstream in a wooden boat,
sliding the oars under the water
then raising them to drip in the light.

But the nearest I have ever come to
fishing on the Susquehanna
was one afternoon in a museum in Philadelphia,

when I balanced a little egg of time
in front of a painting
in which that river curled around a bend

under a blue cloud-ruffled sky,
dense trees along the banks,
and a fellow with a red bandana

sitting in a small, green
flat-bottom boat
holding the thin whip of a pole.

That is something I am unlikely
ever to do, I remember
saying to myself and the person next to me.

Then I blinked and moved on
to other American scenes
of haystacks, water whitening over rocks,

even one of a brown hare
who seemed so wired with alertness
I imagined him springing right out of the frame.

by Billy Collins

 

Napoleon plundered Europe’s art to bring prestige home to France

Terry Hartle in The Christian Science Monitor:

As his armies conquered most of Europe, Napoleon Bonaparte demonstrated an insatiable desire to steal art. These were not smash-and-grab operations. According to Cynthia Saltzman’s marvelous book, “Plunder: Napoleon’s Theft of Veronese’s Feast,” he sought out experts to advise him on which cultural treasures to ship back to Paris. Napoleon wanted to expand the art collection in the Louvre palace. He wrote to France’s five-member governing committee to “send three or four known artists” to choose the best paintings and sculptures.

The peace treaties Napoleon imposed on defeated foes usually required artworks to be forfeited. A 1796 treaty with Pope Pius VI, for example, was worded: “The Pope shall deliver to the French Republic one hundred paintings, busts, vases or statues at the choice of the Commissioners who will be sent to Rome.” At one point he even boasted to the governing committee, “we have everything that is a work of art in Italy, save for a small number of objects in Turin and Naples.”

The French justified this theft not only as part of the spoils of war but also as a way of demonstrating the French Republic’s dominant position in Europe’s new military, political, and cultural order, Saltzman writes. Possessing these objects would demonstrate “their passion for knowledge, their respect for history, their discipline, rationality, and expertise in the fine arts.”

Saltzman tells this story by focusing on the fate of one particular masterpiece: Paolo Veronese’s “The Wedding Feast at Cana.” Painted for the monastery of San Giorgio Maggiore in Venice in 1563, the painting recounts Jesus’ first miracle, the changing of water into wine. The giant canvas measures 22 feet by 33 feet and includes 130 life-size figures arranged across a richly colored and beautifully painted canvas.

More here.

What Misspellings Reveal About Cultural Evolution

Helena Miton in Nautilus:

Something about me must remind people of a blind 17th-century poet. My last name, Miton, is French, yet people outside of France invariably misspell it as “Milton”—as in the famed English author, John Milton, of the epic poem Paradise Lost. It is not uncommon for people to misspell an unfamiliar name—yet 99 times out of 100 people misspell mine as “Milton.” That is the name that shows up on everything from my university gym card to emails from colleagues. It might seem trivial, yet this misspelling actually illustrates a key feature of how cultural practices emerge and stabilize.

When studying culture, one of the key questions scientists ask is about continuity: Why do people do the same things, in roughly similar ways, over long periods of time? Consider how traditional food recipes, say tamales, have maintained a stable core definition over generations—corn-based dough cooked in corn husks.

Cognitive anthropologists such as myself try to answer this scientific question by studying how human minds interact with culture. One approach, known as cultural evolution, draws from Darwinian theory to view the evolution in longstanding cultural practices as akin to the evolution of biological species.

Most cultural evolution theorists assume that these traditions are maintained through generations by faithful transmission, or what’s known as “cultural fidelity.” Because humans are considered to be particularly adept at acquiring information through imitation, it stands to reason, they say, that we’d copy our models without mistakes. Humans, these researchers assert, inherit cultural information in the same way DNA sustains genetic information, with low rates of random mutations. Considering cultural change in this way has led cultural evolutionists to rely heavily on the subfield of population genetics—and to use models that assume cultural continuity works solely through inheritance.

Yet cultural information is not actually passed on through generations with the same degree of fidelity as genetic information.

More here.

Thursday, August 12, 2021

Place, Pastness, Poems: A Triptych

Seamus Heaney at Salmagundi:

Neruda’s declaration that “the reality of the world … should not be underprized” implies that we can and often do underprize it. We grow away from our primary relish of the phenomena. The rooms where we come to consciousness, the cupboards we open as toddlers, the shelves we climb up to, the boxes and albums we explore in reserved places in the house, the spots we discover for ourselves in those first solitudes out of doors, the haunts of those explorations at the verge of our security—in such places and at such moments “the reality of the world” first wakens in us. It is also at such moments that we have our first inkling of pastness and find our physical surroundings invested with a wider and deeper dimension than we can, just then, account for.

What I am talking about is at the time an unconscious process. It is neither sentimental nor literary, since it happens during the pre-reflective stage of our existence.

more here.

The Unexemplary Simone Weil

Alexa Hazel at The Point:

Simone Weil was difficult for those who knew her in life and no less difficult for those who encounter her now, through the writings that survived her death at the age of 34 in 1943. Robert Zaretsky’s new intellectual biography, The Subversive Simone Weil: A Life in Five Ideas (2021), evokes several difficulties in its epilogue. Weil’s character was “extreme.” Her ideas were largely impractical (“at worst inhuman”). He calls her attitude “merciless.” And yet, “I cannot resist returning time and again to this remarkable individual,” Zaretsky writes. She led an “exemplary” life. “For many of her readers,” he suggests, “Weil’s life has all the trappings of secular sainthood.”

Some do take a strong stance on Weil (saint, insane). Many more find themselves in what Zaretsky calls an “untenable position.” T.S. Eliot alludes to Weil’s “great soul” several times in his preface to the English translation of The Need for Roots. Eliot echoes Albert Camus, who collected and published much of Weil’s work after her death, and once called her “the only great spirit of our time.”

more here.

What can the decline of the Roman Empire and the end of European feudalism tell us about COVID-19 and the future of the West?

John Rapley in Aeon:

Neo-Malthusians credited environmental feedback loops, not moral failings, for regime collapse. In the 1960s and ’70s, works by Paul Ehrlich and Donella Meadows et al argued that the world’s population was growing so fast it would soon outstrip resource supplies, leading to (among other things) widespread food shortages. More recently, Jared Diamond wrote of the role that environmental depletion and diseases played in the fall of civilisations, and his theory that the collapse of Easter Island resulted from overexploitation of the natural environment has enjoyed particular resonance. For its part, the COVID-19 pandemic revived old theories about the role that diseases played in regime collapse, and we were reminded that plagues had laid low the Roman Empire and destroyed European feudalism.

Except, that wasn’t what happened. At least, not quite the way supposed.

More here.

Animals Can Count and Use Zero. How Far Does Their Number Sense Go?

Jordana Cepelewicz in Quanta:

Practically every animal that scientists have studied — insects and cephalopods, amphibians and reptiles, birds and mammals — can distinguish between different numbers of objects in a set or sounds in a sequence. They don’t just have a sense of “greater than” or “less than,” but an approximate sense of quantity: that two is distinct from three, that 15 is distinct from 20. This mental representation of set size, called numerosity, seems to be “a general ability,” and an ancient one, said Giorgio Vallortigara, a neuroscientist at the University of Trento in Italy.

Now, researchers are uncovering increasingly more complex numerical abilities in their animal subjects. Many species have displayed a capacity for abstraction that extends to performing simple arithmetic, while a select few have even demonstrated a grasp of the quantitative concept of “zero” — an idea so paradoxical that very young children sometimes struggle with it.

More here.

The Truth About Intervening Powers in the Middle East

Trita Parsi and Matthew Petti in The American Prospect:

Reviewing all of the region’s military interventions between 2010 and 2020, our research shows that several powerful states in the region intervene militarily in the affairs of their neighbors to roughly the same degree, defying the idea that the region’s instability can be blamed on a single pariah state.

Among these states—Iran, Israel, Qatar, Saudi Arabia, Turkey, and the United Arab Emirates—there is no outlier. While Washington has fixated on Tehran’s interventions, the data shows that the UAE and Turkey have of late outdone Iran in terms of military meddling in the affairs of their neighbors. Iran’s support for militias in Iraq and Lebanon has grabbed headlines in the American media, but the UAE has quietly been building its own international mercenary army with the help of contractors like Erik Prince, and Turkey has shuttled fighters from Syria to Libya and Nagorno-Karabakh.

More here.

How the ‘sponge’ made by the bacteria Geobacter soaks up uranium

Matt Davenport in Science:

For decades, scientists suspected that bacteria known as Geobacter could clean up radioactive uranium waste, but it wasn’t clear how the microbes did it.

“The biological mechanism of how they were doing this remained elusive for 20 years,” said Gemma Reguera, the Spartan microbiologist whose team solved that mystery 10 years ago. Well, three-quarters of the mystery. She’s now cracked the rest of the case. What Reguera discovered in 2011 was that, on one side of their cells, the Geobacter make protein filaments that act like little wires to literally zap uranium. This does two things. For one, the jolt triggers chemical reactions that give the bacteria energy. Secondly, that chemistry traps the uranium in a mineral form, preventing the radioactive material from spreading through the environment. But those protein wires accounted for just about 75% of the uranium that the Geobacter were cleaning up.

“We always knew we were missing something,” said Reguera, a professor of microbiology and molecular genetics in the College of Natural Science. “What we didn’t know was what was happening at the cell surface, particularly on the side of the cell that had no wires to immobilize the uranium.”

Now, Reguera’s team has the answer. Molecules called lipopolysaccharides coat the cell surface and soak up the uranium like a sponge.

More here.

Deciphering the molecular language of the small intestine

Marco Jost in Nature:

Our main goal is to begin deciphering the molecular communication between bacteria (and the small molecules they secrete) and host cells in the small intestine. We’re particularly interested in enteroendocrine cells — cells found in the lining of the small intestine and throughout the intestinal tract — and how the small-intestine microbiome prompts them to release hormones. We also want to explore how this communication allows gut bacteria to alter physiology throughout the body. We know that gut bacteria affect biological processes in distal places such as the brain and skeletal muscles. I believe that bacterial communication with enteroendocrine cells is a major mechanism. These cells secrete hormones and neurotransmitters, and they also talk to neurons, sending signals across the body. We know there are physical interactions, where bacteria adhere to host cells. There are also chemical-signaling interactions, where intestinal cells sense and react to small molecules produced by microbes. We don’t yet understand the full context or implications of this molecular language in the small intestine. We hope to begin probing which small molecules the enteroendocrine cells respond to, which bacteria produce these molecules, which receptors they bind to, and how that translates to changes in biological processes. Our hope is to provide valuable novel therapeutic targets, not just for metabolic disorders, but also for neuropsychiatric conditions, and disorders influenced by the microbiome.

What cells and molecules will you focus on?

The small intestine is an incredibly dynamic environment, and we know that diet is a key influence on small-intestine activity. We also know there is a rich diversity of enteroendocrine cells in the small intestine, and that the chemical landscape is very interesting. There are different types of enteroendocrine cells, each with its own specialized function. Most commonly, they each secrete a different hormone in response to external prompts such as diet.

More here.

Thursday Poem

Manic Screaming

We should make all spiritual talk
…. Simple today:

God is trying to sell you something,
…. But you don’t want to buy.

This is what your suffering is:

Your fantastic haggling,
…. Your manic screaming over the price!

by Hafiz
from
I Heard God Laughing
Penguin Books, 2006

Wednesday, August 11, 2021

Dear Porch: Everybody Wants Some!! & The Green Ray

Morgan Meis in The Porch Magazine:

I’m not gonna say that Everybody Wants Some!!, the film by Richard Linklater, is a great movie. It is not. But it’s pretty good. We should also just appreciate a film that has not one but two!! exclamation marks in its official title. And yet, something nags at me about the title, that sentence, everybody wants some. What is it that everybody wants? Some. Some what? Well sex, of course, everbody wants some sex. And most of the people in the film are chasing after sex, especially the jocks on the baseball team, our ostensive heroes, the protagonists of the film if there are any protagonists in this film. They want to have as much sex as possible, those baseball jocks, and a few of them get just that. They also want something to do with baseball. They want to become baseball players of a professional sort. They want some fame, some glory, the glory of sport. Probably they want some money also, the money that goes along with the glory and that overlaps to at least some degree with the sex. Sex, glory, and money. That is what they want some of.

One amazing thing that Linklater achieves in the film, to my mind, dearest Porch, I don’t know if you had the same experience with the film, but I’ve noticed that many reviewers of the film say something along these same lines, they say that you can’t really dislike these jocks. It is a funny point but one I’d have to agree with.

More here.