From the Phenomenology to the Mechanisms of Consciousness: Integrated Information Theory 3.0
A mechanism generates information to the extent that it selectively constrains a system's past states. Element constrains the past states of depending on its mechanism (AND gate) and its current state. The constrained distribution of past states is called A's cause repertoire. (A) The connections between and are noisy. A's cause repertoire is thus unselective, since could have followed from any state of with equal probability. (B) In the case of deterministic connections and current state , A's cause repertoire is maximally selective, because all states except are ruled out as possible causes of . (C) In the case of deterministic connections and current state , A's cause repertoire is much less selective than for , because only state is ruled out as a possible cause of .