Integrated information theory (IIT) 4.0: Formulating the properties of phenomenal existence in physical terms
This paper presents Integrated Information Theory (IIT) 4.0. IIT aims to account for the properties of experience in physical (operational) terms. It identifies the essential properties of experience (axioms), infers the necessary and sufficient properties that its substrate must satisfy (postulates), and expresses them in mathematical terms.
Image credit: Albantakis et al