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From the Phenomenology to the Mechanisms of Consciousness: Integrated Information Theory 3.0

Figure 1

Existence: Mechanisms in a state having causal power.

(A) The dotted circle indicates elements ABC as the candidate set of mechanisms. Elements outside the candidate set (D, E, F) are taken as background conditions (external constraints). The logic gates A, B, and C are represented as is customary in neural circuits rather than electronic circuits. The arrows indicate directed connections between the elements. (B) The set's mechanisms ABC determine the transition probability matrix (TPM) of the set under the background conditions of DEF (here DEF(t−1) = DEF(t0) = 010). With element D fixed to D = 0, element A, for instance, receives inputs from B and C and outputs to B and C. The OR gate A is on (1) if either B, or C, or both were on at the last time step, and off (0) if BC was 00. Filled circles denote that the state of an element is ‘1’, open circles indicate that the state of an element is ‘0’. The current state of ABC is 100.

Figure 1