🧵 In today's SFI Seminar, Visiting Scholar @cgershen presents the second in his series of talks on core concepts in #ComplexSystems science, streaming now:
"In high school #physics class you are taught that with the initial conditions of a system, you can predict its future states. In #complexity, this is not so...it means #reductionism is not appropriate, #Platonism is not appropriate..."
- @cgershen
"You can see a layer of circuits computing something. What is it computing? Itself. In a 248x248 array, you can program the #GameOfLife inside the game of life. Computers allow us to explore #Complexity, and it's no surprise complexity became a science in the 1980s."
- @cgershen
@cgershen "The components of the cells are not #alive, but the cells ARE alive. Where does the life come from? Where does our MIND come from? It seems #life and #mind are not properly defined, but there are other examples where it becomes clear what we mean by #emergence."
- @cgershen
"The same systems can be considered self-organizing or self-DISorganizing, by the same observer. It depends."
@cgershen "15 years ago, I wrote this book. I asked, what do you think will be the future of #complexity? There were more or less evenly-distributed three camps: one group said it's an established #science; one said it's a #protoscience; some said it's just a bunch of methods."
- @cgershen
• • •
Missing some Tweet in this thread? You can try to
force a refresh
ICYMI, this week's SFI Seminar by Fractal Faculty Stuart Firestein (@Columbia) on "what started out ass a very simple-seeming problem [re: #olfaction] and turned out to be very complicated":
"Everything we know about the world comes through these little holes in our head and the skin covering our body, processed through tissue specialized to interpret it."
"The thing to notice about [sight and hearing] is that they're [processing] fairly low-dimensional stimuli."
"Even a simple smell is composed of a VARIETY of molecules, and these are high-dimensional from a chemical point of view. And it's also a somewhat discontinuous stimulus. How do we get from this bunch of molecules to this unitary perception of something like a rose?"
"A key feature of this is talk is that we make sense of what each other are saying IN PART by what they say, but ALSO by what we expect of them."
"Language transmits info against a background of expectations – syntactic, semantic, and this larger cultural spectrum. It's not just the choices of make but [how] we set ourselves up to make later choices."
"I think what really drives [the popularity of the #multiverse in #scifi] is regret... There's a line in @allatoncemovie where #MichelleYeoh is told she's the worst version of herself."
"I don't think we should resist melting brains. I think we should just bite the bullet."
"When you measure the spin of an electron, or the position...what happened to all of the other things you could have seen? Everett's idea is that they're all real. They all become real in that measurement."
- SFI Fractal Faculty @seanmcarroll at @guardian theguardian.com/science/audio/…
"At the level of the equations there is zero ambiguity, but the metaphors break down. The two universes it splits into aren't as big as the original universe. The thickness of the two new universes adds up to the thickness of the original universe."
"One way to represent the kind of #compositionality we want to do is with this kind of breakdown...eventually a kind of representation of a sentence. On the other hand, vector space models of #meaning or set-theoretical models put into a space have been very successful..."
"Humans are prone to giving machines ambiguous or mistaken instructions, and we want them to do what we mean, not what we say. To solve this problem we must find ways to align AI with human preferences, goals & values."
- @MelMitchell1 at @QuantaMagazine: quantamagazine.org/what-does-it-m…
“All that is needed to assure catastrophe is a highly competent machine combined with humans who have an imperfect ability to specify human preferences completely and correctly.”
"It’s a familiar trope in #ScienceFiction — humanity threatened by out-of-control machines who have misinterpreted human desires. Now a not-insubstantial segment of the #AI research community is concerned about this kind of scenario playing out in real life."
- @MelMitchell1