
reductio ad absurdum, the new mark of a sound argument
I don’t know how it happened. Maybe the bodystealers murdered Rationality and gave the skinsuit to Madness. My theory is more reserved: I think there was a recent change in the fabric of the universe. Either way, something happened that reductio ad absurdum is no longer a method of falsification. It’s now the sign of a good argument. Today, every visionary idea in Silicon Valley, from “cure for death” longevity research, through the full gamut of AI speculation, to Dark Right social accelerationism, stands on the new standard of logical proof: that a premise is true if it leads to absurd conclusions.
If you need a refresher, reductio ad absurdum is supposed to falsify an argument by seeing it all the way through. It’s a type of falsification by contradiction. Justice Oliver Wendell Holmes Jr. shows the value of the method in US jurisprudence. Should the right to free speech be entirely unlimited? Well, if it was, people could falsely cry “fire” in a crowded theater. That can’t be right! Therefore, the principle of free speech should have some limits. When I was a child, easily led astray by the others, my elders would ask “If your friends jumped off a cliff, would you follow?”. Their point, which hit eventually, was that I have to think for myself what’s right or wrong.
In neorationalism today a premise is true if it leads to absurd conclusions.
TREACLES
I always found reductio ad absurdum to be the most fun and colorful form of falsification. In today’s mad world, it’s still colorful, but it’s no longer falsification. Now, absurd ideologies based on lazy extrapolation are treated like they stand on compelling logic. Accelerationism is the argument that we should force techno-utopian revolution by accelerating society’s decline. Not only should you jump after your friends off the cliff, you should take as many people as possible down with you. Many of our new paragons of rationality buy it, and the idea continues to grow.
Today, influential ideologies like accelerationism, existential risk, longtermism, transhumanism, “extropism” (I’ll unpack these in a bit) are all parts of the ideological framework for the most extreme and future-focused thinking in the SF Bay Area’s Silicon Valley. If you peel back the surface of any major techno-utopian trend in the last decade, you’ll find one of these mindworms wiggling around justifying indifference to the issues of today and an obsession with the fanciful issues of tomorrow. What are they?
Existential risk (“X-risk”) is the idea that human extinction is infinitely worse than any non-existential problem (poverty, oppression, and even climate change). Under this belief, future events that could pose an extinction threat, such as asteroids or rogue AI, are the important focus for today’s brightest minds, even when the chances of those events are incredibly small. If you’re close enough to the Bay neorationalist scene, you know people who think we must put all our focus on preventing/accelerating the doom/salvation of AI. As the logic goes, any real bad problem of today is quantitatively less bad than an infinitely bad future problem, no matter how unlikely, while any present good is less good than the infinite good of some Maybe-Tomorrow.
Longtermism, which sounds nice at first, is the idea that we’re ethically obliged to incorporate the well-being of future people in altruistic calculations of today. Since there are probably many more people in the future than today, we reach X-risk’s conclusion by another path: the world’s problems of today are nothing against the possible problems of tomorrow.
Next are extropism and transhumanism, the schools of thought interested in extrapolating social and ethical thought into a world in which humans are no longer bound by physiological or physical limits. Whether through biological immortality, or sci-fi consciousness uploads to an ethereal Internet, both imagine a humanity without limits. Scoff if you like, but it’s the logic of every other faith tradition, afterlife included.
Why is this happening? I think proof by contradiction can be hard to tell from simple induction in the wild. And that’s awkward because contradiction shows things to be false, and inductions shows them to be true. Let’s treat yelling “fire” from the other end, as a proof of free speech absolutism. If I accept that it’s OK to falsely yell fire in an empty theater, and I can prove it’s OK to yell fire for a partially populated theater if it was OK to tell when there was one fewer person there, then Holmes’ argument can be read as a claim that, by induction, any true free speech devotee should, in fact, falsely yell fire in crowded theaters. I think the mindworms are based on this same confusion between induction and contradiction, and it’s fueled a bit by an ideology that treats the claim to be tested as the premise to be assumed, and the masterstroke moment of contradicting that premise as its logical consequence.
Aside from that I also think there’s some political economy at play. Must an “absurd” conclusion be a false one? Not if it’s profitable. Investors don’t want to fund a new company, they want to fund a new future. When the way of thinking that always made you square lets you rebrand as a self-made philosopher or visionary entrepreneur, it’s easy to get sloppy.
Utilitarianism: One logic to rule them all
If you’re seeing similarities between these ideologies, it’s because they’re kin. All of these ouroboran arguments come out of utilitarianism, the rational approach to ethics first developed in the late 19th century by thinkers such as Bentham and J.S. Mill. Have you been asked whether it’s OK to save five lives by diverting a runaway trolley to kill only one person? If so you’re familiar with the ethical calculus of utilitarianism. Trolley-ology, also known as contemporary moral philosophy, has seen a resurgence in the last twenty years as philosophers discovered that people pay more attention with lurid examples. “Rationalism” and “effective altruism”, the neoutilitarianisms, have had real sway among young people disaffected by our less civil, more political age. The promise of an objective, dispassionate approach to the world’s problems has made these ideologies an attractive refuge with a rich tradition.
Following Bentham, utilitarianism grew to tackle a wide range of problems. I read the trolley problem was first developed by philosopher Philippa Foot to understand the ethics of abortion. On its path through the 20th century it attracted a variety of adherents and critics. One notable critic was Robert Nozick, the economic theorist also famous for developing the logical foundations of libertarianism. His 1974 book “Anarchy, The State, and Utopia,” awarded Best Title For A Philosophical Treatise by me in 2015, argued that society can maximize individual liberty despite the inherent oppression and violence of states. His angle is that if humans can be guaranteed the power to always leave their current state for another, then it would create market competition among would-be dictators for citizens. Nozick’s exit-based utopia, “the market for tyrants,” has become the template for libertarian dreams for our future. Try to miss it in Barlow’s “A Declaration of the Independence of Cyberspace”, or Srinivasan’s “Network State”, both of which offer up decentralization technologies like the Internet as the very models of an exit-based social order. My own research approaches the ecosystem of self-hosted web servers (including Minecraft servers) as a perfect Nozickian market for tyrants. When techno-utopianism and libertarianism finally tied the knot in 21st century California, Nozick gave the toast.
I have to control myself to be kind about these ideas—I’ve always kept my choler up by hate-reading libertarian theory—but the basic idea is sympathetic: we can logically derive what is right and good from simple premises and sober reason. I love that kind of thing. It’s exciting to imagine that the world may be as simple as our models for it, especially when you see how new technology can make the dream so. It’s that appeal that has made so many bright young people flock to San Francisco in the last decades.
Libertarianism and utilitarianism, each an ethical theory grounded in reason, both benefitted from the fundamental contributions of Nozick. In addition to building the classic logical arguments for libertarianism, he also gives us some of the most influential thought experiments in utilitarianism. His two most famous are the colorfully named “experience machine” and “utility monster.”
In Nozick’s “experience machine”, advanced technology (actually “superduper neuropsychologists”) can put you in a coma, wire you up, and induce any fantastic life experiences you desire while you’re under, as faithful as any actual experience you’re due for in real life. But there’s no coming back. The question: should you plug in?
In Nozick’s “utility monster”, we imagine a being infinitely stoked. Anything anyone likes, it likes better. The question: is the public good maximized by diverting all social resources to the utility monster’s infinitely superior capacity for satisfaction, at the expense of everyone else?
At some point in Silicon Valley today, these thought experiments became blueprints. They are directly inspiring tech’s wildest ideological projects. Transhumanism, and to some extent AI, are projects to create experience machines. Existential risk, premised on infinite negative utility, is the utility monster run backwards. All of the isms in the Silicon Valley ideological complex — Transhumanism, Extropianism, Neorationalism, Effective Altruism, Existential Risk, Longtermism, and also Singularitarianism and Cosmism (collectively named TESCREAL by Gebru and Torres; but for our purposes, TREACLES will do), fall one way or another out of the idea that it’s immoral and destructive to do anything but pursue outlandish infinite goods and prevent outlandish infinite bads.
The Twist
Like I just said, Nozick made fundamental contributions to both of the major ideological pillars of Silicon Valley. But while his contributions to libertarianism were “PRO”, his contributions to utilitarianism were “ANTI.” Nozick was not a utilitarian. The experience machine and the utility monster are both arguments against utilitarian thinking. Each is a proof by contradiction, showing that when you push the premises of quantitative ethics to its extreme, the result is absurd.
Of course a delightful imaginary life is not a replacement for life!
Of course we should not commit all social resources to one infinitely good or bad thing!

Is 2 equal to 1.4142…? It is if you’re not careful about replacing the stairs in your staircase with infinitely many infinitesimal stairs. When “AI alignment” tells you that AI has to be like you or it’ll replace us all with paperclips (actual supposedly rational concern), that’s not a problem of aligning AI, it’s a problem with using infinity carelessly in logical arguments.
When Rationalism tells you that everything real around you is a worthless distraction from the imaginary problems that really matter, that’s not a critique of everything around you, it’s a critique of Rationalism. If anything, it’s the future problems that are worthless because, by the same carelessness around infinity, there is no tomorrow! Zeno’s Arrow of Time, which I just made up, says that to get to tomorrow we have to get halfway there, and to get to the halfway point, we have to get halfway to that, and half way to that, and that, and that. Therefore, you should live for the present.
Sound logic applied to an unsound world is unsound. You can’t extrapolate on just one parameter in isolation when the system you’re modeling, society, has many that all interact. These arguments exist to make a mockery of utilitarianism and its whole flawed TREACLES brood. They aren’t reasonable arguments about society, they’re arguments against using pure reason on society.
Well, they used to be. Turning dials to 11 was once satire, but now it’s the fashion. Due to a recent change in the fabric of the universe, or maybe lizard people, reductio ad absurdum is now the gold standard for Bay Area visionwork. In this brave new world, up is down, left is right, and amoral utilitarianism, Nozick’s punching bag, Silicon Valley’s absurd religion, is the logical end of crystal clear, razor sharp, cold hard reason.

Shot from Spinal Tap (1984), which used to be satire ➡
Postscript
This argument has been cooking for years, and has taken so long to get out. The main reason is I thought it was obvious, especially to the kind of person who would put the word “rational” in their self identification. I was wrong. But at least I’m less wrong than a bunch of Harry Potter fanfic.









