Thread by @sfiscience

"If I were to write a textbook on #complexity, it would be structured like this..."
- SFI Pres David Krakauer starts off this morning at #CSSS19 #CSSS at @IAIASantaFe

#error #adaptation #universality #coarsegrained #math #theory

"If you talk about #intelligence and #stupidity, you talk about #communication and #policy. That is the natural place to start."

"If you've ever written a Lokta-Volterra #equation, you've drawn a perpetual motion machine. There's no #dissipation."

- SFI President David Krakauer

"Why #God is a bad #theory: it's not because it's not true; it's because it uses an infinite-dimensional process to explain low-dimensional phenomena."

- SFI President David Krakauer at #CSSS19 on #Ockham's Razor & why #Darwin's animal breeding metaphor backfired on #evolution

Why #ML algorithms don't tend to get stuck: they don't just climb a #gradient to local optima, but also follow #curvature, applying local information to #nonlinear landscapes.
#Adaptation thus leads to max stochastic dependency...
SFI Pres David Krakauer at #CSSS19 @IAIASantaFe

"#Adaptation is an optimization dynamics generating #ecological compression."

...and #nicheconstruction makes a simpler #environment, instead of a model of a complex environment:

"When you buy a house, you're doing that."

- SFI Pres David Krakauer at #CSSS19
#CSSS @IAIASantaFe

"If you're going to talk about #entropy, you have to talk about #structure...one way to do it is with #sequence #space."

- SFI President David Krakauer at #CSSS19 #CSSS on how "a #genome four #bits in length lives in the #hypercube."

#tesseract

Just as #physics has a #lightcone restricting movement across a #spacetime manifold, #biology has a "life-cone" limiting #evolution by a maximum rate of one coding #mutation per #genome per #generation.

SFI Pres David Krakauer on the max speed of #life at #CSSS19 #CSSS: