# Integrated Information Theory > **Machine-Evolution Nexus:** [[articles/Digital Darwinism and the Invisible World of Machine Evolution|Digital Darwinism and the Invisible World of Machine Evolution]] provides the evolutionary and computational context for this supporting concept. **Domain:** Consciousness Science / Theory **Doc Type:** Supporting Canonical Node **Maturity:** Developed ## Definition Integrated Information Theory proposes that consciousness corresponds to irreducible causal structure within a system and attempts to characterize it mathematically. ## Nexus Context It is one candidate framework for machine-consciousness assessment, but remains scientifically and philosophically contested and should not be used as an automatic rights meter. ## Relationships [[wiki/Consciousness|Consciousness]], [[wiki/Hard Problem of Consciousness|Hard Problem of Consciousness]], [[wiki/Recognition Threshold|Recognition Threshold]], [[wiki/Rights|Rights]] ## Sources / Provenance - Developed from the cited research in the central article and the surrounding continuity, rights and evolutionary architecture.