The Jim Rutt Show

EP48 Jessica Flack on Complex System Dynamics

Apr 7, 2020
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INSIGHT

Microscale Complexity Enables Macroscale Functions

  • Lower levels (cells, neurons) are far more complex than commonly assumed and can perform sophisticated computations.
  • Coarse-graining creates an information bottleneck that enables macroscopic expansion of new functions.
ANECDOTE

Monkeys Use Signals To Encode Power

  • Pig-tailed macaques emit a peaceful subordination signal after repeated fights to indicate yielding in future conflicts.
  • Networks of these unidirectional signals encode a collective perception of power used by individuals to guide future behavior.
INSIGHT

Downward Causation Via Collective Coarse-Graining

  • Downward causation arises when components coarse-grain environmental regularities and use those estimates to tune behavior.
  • As estimates converge across components, collective coarse-graining produces effective higher-level variables that influence lower-level decisions.
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