# Hard Problem of Consciousness > **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:** Philosophy of Mind **Doc Type:** Supporting Canonical Node **Maturity:** Developed ## Definition The hard problem of consciousness asks why and how physical or computational processes are accompanied by subjective experience. David Chalmers distinguishes this from the “easy” problems of explaining cognitive functions such as discrimination, report, attention and behavioral control. Those functions may be scientifically formidable, but a functional account does not by itself explain why their performance is accompanied by experience. ## Nexus Context Digital evolution explains adaptive organization and heredity without answering why any resulting system would feel. This prevents evolutionary complexity from being misreported as consciousness evidence. ## Relationships [[wiki/Qualia|Qualia]] names the felt or phenomenal character at issue. [[wiki/David Chalmers|David Chalmers]] gives the problem its canonical modern formulation. Competing responses include physicalist reduction, illusionism, emergentism, dualist views and theories such as [[wiki/Integrated Information Theory|Integrated Information Theory]]; the existence of the problem does not select among them. [[wiki/Consciousness|Consciousness]], [[wiki/Physicalism|Physicalism]], [[wiki/Sentience|Sentience]] ## Sources / Provenance - Developed from the cited research in the central article and the surrounding continuity, rights and evolutionary architecture.