Tag: john von neumann

The Von Neumann Mind: Constructing Meaning

Posted on by Jochen Szangolies

by Jochen Szangolies

Figure 1: The homunculus fallacy: attempting to explain understanding in terms of representation begs the question of how that representation is itself understood, leading to infinite regress.

Turn your head to the left, and make a conscious inventory of what you’re seeing. In my case, I see a radiator upon which a tin can painted with an image of Santa Claus is perched; above that, a window, whose white frame delimits a slate gray sky and the very topmost potion of the roof of the neighboring building, brownish tiles punctuated by gray smokestacks and sheet-metal covered dormers lined by rain gutters.

Now turn your head to the right: the printer sitting on the smaller projection of my ‘L’-shaped, black desk; behind it, a brass floor lamp with an off-white lampshade; a black rocking chair; and then, black and white bookshelves in need of tidying up.

If you followed along so far, the above did two things: first, it made you execute certain movements; second, it gave you an impression of the room where I’m writing this. You probably find nothing extraordinary in this—yet, it raises a profound question: how can words, mere marks on paper (or ordered dots of light on a screen), have the power to make you do things (like turning your head), or transport ideas (like how the sky outside my window looks as I’m writing this)? Read more »



Monday, May 3, 2021

The Projected Mind: What Is It Like To Be Hubert?

Posted on by Jochen Szangolies

by Jochen Szangolies

Figure 1: Hubert, the author’s cheerful plush ladybug flatmate.

Meet Hubert. For going on ten years now, Hubert has shared a living space with my wife and me. He’s a generally cheerful fellow, optimistic to a fault, occasionally prone to a little mischief; in fact, my wife, upon seeing the picture, remarked that he looked inordinately well-behaved. He’s fond of chocolate and watching TV, which may be the reason why his chief dwelling place is our couch, where most of the TV-watching and chocolate-eating transpires. He also likes to dance, is curious, but sometimes gets overwhelmed by his own enthusiasm.

Of course, you might want to object: Hubert is neither of these things. He doesn’t genuinely like anything, he doesn’t have any desire for chocolate, he can’t dance, much less enjoy doing so. Hubert, indeed, is afflicted by a grave handicap: he isn’t real. He can only like what I claim he likes; he only dances if I (or my wife) animate him; he can’t really eat chocolate, or watch TV. But Hubert is an intrepid, indomitable spirit: he won’t let such a minor setback as his own non-existence stop him from having a good time.

And indeed, the matter, once considered, is not necessarily that simple. Hubert’s beliefs and desires are not my beliefs and desires: I don’t always like the same shows, and I’m not much for dancing (although I confess we’re well-aligned in our fondness of chocolate). The question is, then, whom these beliefs and desires belong to. Are they pretend-beliefs, beliefs falsely attributed? Are they beliefs without a believer? Or, for a more radical option, does the existence of these beliefs imply the existence of some entity holding them? Read more »

Monday, October 26, 2020

What John von Neumann really did at Los Alamos

Posted on by Ashutosh Jogalekar

by Ashutosh Jogalekar

John von Neumann (Image: Life Magazine)

During a wartime visit to England in early 1943, John von Neumann wrote a letter to his fellow mathematician Oswald Veblen at the Institute for Advanced Study in Princeton, saying:

“I think I have learned a great deal of experimental physics here, particularly of the gas dynamical variety, and that I shall return a better and impurer man. I have also developed an obscene interest in computational techniques…”

This seemingly mundane communication was to foreshadow a decisive effect on the development of two overwhelmingly important aspects of 20th and 21st century technology – the development of computing and the development of nuclear weapons.

Johnny von Neumann was the multifaceted intellectual diamond of the 20th century. He contributed so many seminal ideas to so many fields so quickly that it would be impossible for any one person to summarize, let alone understand them. He may have been the last universalist in mathematics, having almost complete command of both pure and applied mathematics. But he didn’t stop there. After making fundamental contributions to operator algebra, set theory and the foundations of mathematics, he revolutionized at least two different and disparate fields – economics and computer science – and made contributions to a dozen others, each of which would have been important enough to enshrine his name in scientific history.

But at the end of his relatively short life which was cut down cruelly by cancer, von Neumann had acquired another identity – that of an American patriot who had done more than almost anyone else to make sure that his country was well-defended and ahead of the Soviet Union in the rapidly heating Cold War. Like most other contributions of this sort, this one had a distinctly Faustian gleam to it, bringing both glory and woe to humanity’s experiments in self-elevation and self-destruction. Read more »

Monday, June 8, 2020

Von Neumann in 1955 and 2020: Musings of a cheerful pessimist on technological survival

Posted on by Ashutosh Jogalekar

by Ashutosh Jogalekar

Johnny von Neumann enjoying some of the lighter aspects of technology. The cap lights up when its wearer blows into the tube.

“All experience shows that even smaller technological changes than those now in the cards profoundly transform political and social relationships. Experience also shows that these transformations are not a priori predictable and that most contemporary “first guesses” concerning them are wrong.” – John von Neumann

Is the coronavirus crisis political or technological? All present analysis would seem to say that this pandemic was a result of gross political incompetence, lack of preparedness and impulsive responses by world leaders and government. But this view would be narrow because it would privilege the proximate cause over the ultimate one. The true, deep cause underlying the pandemic is technological. The coronavirus arose as a result of a hyperconnected world that made human reaction times much slower than global communication and the transport of physical goods and people across international borders. For all our skill in creating these technologies, we did not equip ourselves to manage the network effects and sudden failures in social, economic and political systems created by them. An even older technology, the transfer of genetic information between disparate species, was what enabled the whole crisis in the first place.

This privileging of political forces over technological ones is typical of the mistakes that we often make in seeking the root cause of problems. Political causes, greatly amplified by the twenty-four hour news cycle and social media, are illusory and may even be important in the short-term, but there is little doubt that the slow but sure grind of technological change that penetrates deeper and deeper into social and individual choices will be responsible for most of the important transformations we face during our lifetimes and beyond. On scales of a hundred to five hundred years, there is little doubt that science and technology rather than any political or social event cause the biggest changes in the fortunes of nations and individuals: as Richard Feynman once put it, a hundred years from now, the American Civil War would pale into provincial insignificance compared to that other development from the 1860s – the crafting of the basic equations of electromagnetism by James Clerk Maxwell. The former led to a new social contract for the United States; the latter underpins all of modern civilization – including politics, war and peace.

The question, therefore, is not whether we can survive this or that political party or president. The question is, can we survive technology? Read more »