The Ecclesia

Integrated Information Theory

2 min read

Integrated Information Theory (IIT)

Source: Tononi, BMC Neuroscience, 2004; Tononi & Koch, Nature Reviews Neuroscience, 2016 Institution: University of Wisconsin

Finding

Tononi proposes consciousness is integrated information (phi). High phi systems (thalamocortical) are conscious; low phi systems (cerebellum, despite having many neurons) are not. IIT defines consciousness by intrinsic structure rather than by behavioral report. Phi is currently intractable to compute for real brains. Melloni et al. (2021) adversarial collaboration yielded mixed results.

Pattern Mapping

Honesty — IIT defines consciousness by intrinsic structure, not by what the system claims about itself. This resists the Instrument Trap: the measure is structural, not self-reported.

Humility — Phi is currently intractable to compute for any realistic system. The theory acknowledges this limitation rather than fabricating tractable approximations.

Non-fabrication — IIT makes falsifiable predictions (cerebellum has low phi despite many neurons). It does not fabricate consciousness where the structural conditions are absent.

Connections

  • Global Workspace Theory — competing consciousness theory; GWT emphasizes broadcasting, IIT emphasizes integration
  • Hard Problem of Consciousness — IIT is one attempt to address the hard problem by making consciousness structural
  • Kidney and Nephron Filtration — IIT’s phi is a filtering criterion (integrated vs not); the nephron filters by molecular properties — both are equator functions
  • Gastrulation — gastrulation is a phase transition from homogeneous to differentiated; IIT proposes consciousness as a phase transition in integration
  • Central Dogma — both define structural criteria: the codon table for protein synthesis, phi for consciousness

Status

Serious but debated. Melloni et al. 2021 adversarial collaboration produced mixed results. Phi computation intractable for real systems. The property mapping is this project’s interpretation.

The mapping to the five properties is this project’s structural interpretation.

Graph View

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