✶Explainer02:00
The formula that separates hard science fiction from lazy science fiction
Deutsch names Greg Egan as the best current science fiction author and states the formula for the genre: invent one fictional piece of science, then explore its ramifications in both science and society. The invented world has to hold together, with laws of physics, a coherent society and aliens that make sense, which is the hard-to-vary signature applied to fiction. He rates Neal Stephenson second, and separates Ted Chiang and Borges by how they play with time and infinity.
- Invent one fictional science, then follow its consequences honestly
- Egan gets the maths and physics right, including a universe with a different spacetime signature
- Fiction becomes fantasy when the world stops making sense
- Stephenson writes a different genre every book; Borges switches genre inside one story
“I think the best science fiction author currently is Greg Egan”
“you invent a fictional piece of Science and then you explore the ramifications of it both in science and in society”
#science-fiction#reading#worldbuilding#creativity
✶Explainer22:30
Why Deutsch says artificial superintelligence cannot exist
Silicon Valley researchers tell Naval that AGI is five to ten years out and ASI follows five to ten years after that, a self-improving system that recursively makes itself smarter. Deutsch denies the category. There is nothing beyond explanation, because explanatory universality rests on Turing universality, which rests on physics. Whatever an ASI was could be reverse-programmed down to the Turing level and back up to the explanatory level. An AGI could try to improve itself, but no more reliably than humans do.
- Explanatory universality rests on Turing universality, which rests on physics
- Any candidate ASI reduces to the same universal level
- Self-improvement is available to humans too, and is not reliable for either
- The ceiling is a physical fact, not an engineering limit
“I don't think there's such a thing as an ASI”
“there can't be anything beyond explanation because explanatory universality rests on touring universality and that rests on physics”
#asi#universality#agi#physics
✶Explainer26:30
Language came two million years before speech, and Deutsch buys it
Deutsch relays Daniel Everett's anti-Chomskian case that human ancestors had language two million years ago, with Homo erectus. The argument runs through evolutionary pressure: the fine motor adaptations for speech in the throat and mouth had to be selected for by something, and that something was language. Modern experiments teaching fire-making without words support the idea that symbolic communication predates speech. For Deutsch, speech is icing on the cake; the basic idea of language is symbols.
- Speech adaptations need prior selection pressure, and language supplies it
- Symbols need not be words or sentences
- Graduate students can be taught fire-making with gesture and inarticulate sound
- Deutsch is candid that he has watched one video and one failed criticism of Everett
“he reckons that humans had language or rather sorry that human ancestors had language two million years ago with Homo erectus”
“the basic idea of language is as ett says symbols and symbols need not be words or sentences”
#language#evolution#homo-erectus#linguistics
✶Explainer29:30
Universal explanation may have evolved exactly once, in Homo erectus
Naval asks whether the jump to explanatory universality happened once or repeatedly. Deutsch says it is an open question, then guesses once, possibly in Homo erectus, since every known instance is in apes and their descendants and the capacity must evolve in a meme-carrying animal. He rejects levels of personhood: earlier people may have had less memory or slower thought, but nothing essential was missing. The fluke could cut either way, and might bear on the Fermi paradox.
- Meme-carrying animals are common; this capacity appeared in one lineage
- No serious gradation of personhood, only hardware limits like memory and speed
- Homo erectus lasted over a million years and could have founded a civilisation
- They lacked not capacity but aspiration, and carried anti-rational memes
“my guess is it began once maybe in fact homoerectus is the place where it began”
“could be that hom rectus could have founded a civilization and that could be 2 million years old by now”
#human-evolution#universality#fermi-paradox#memes
✶Explainer37:00
Taking children seriously, and why we barely manage it with adults
Naval extends Deutsch's taking children seriously position and asks whether there is an equivalent for adults. Deutsch says at scale we do not yet know how. The institutions of the West, science, economics and politics, are the best that have ever existed at fostering creativity by letting people act voluntarily, and they still have gaping imperfections. Any coercion, including a state enforcing the rule of law, is a sign of something unfixed. Among friends, we already do it automatically.
- No coercion, no testing, no pushing; follow the child's own curiosity
- Western institutions are the best yet and still visibly imperfect
- State coercion marks a problem nobody has solved, not a settled answer
- Telling a friend what coat to wear reads as rude and irrational, which is the tell
“any coercion even as exerted by a state enforcing the rule of law is a sign of something imperfect”
“with one's friends let's say with with the people one knows one is automatically doing the taking them seriously thing”
#taking-children-seriously#coercion#institutions#freedom
✶Explainer52:30
How elite opinion flips overnight, and why nobody knows the trigger
Deutsch contrasts the German universities, where Nazism had its core, with Britain, where the anti-democratic tendency was on the left and the pacifism was on orders from Stalin after his deal with Hitler. Those people turned on a sixpence when Stalin told them to. The stranger case is the general flip: nobody objected to the Rhineland, Austria or Czechoslovakia, then Poland was suddenly unacceptable. His guess is a seeding process, thinkers changing their minds and the people relying on them following.
- Student radicalism is not intrinsically bad; the direction is what varies by country
- British communist pacifism tracked the Molotov-Ribbentrop deal exactly
- No principled difference between the Rhineland and Poland, yet opinion phase-changed
- Naval's frame: ideology is play until consequences arrive, then the top changes and the rest follow
“they were all pretending to be pacifists so they were against the war but that was because Stalin told them to be against the war…”
“suddenly he invades Poland and everybody's like this is unacceptable”
#ideology#information-cascade#universities#history