A cannot measure the entanglement entropy across any internal boundary of its environment; it cannot verify that any part of the world it attends to is genuinely independent of everything else (Fields & Glazebrook 2023, Corollary 3.2)

Entities in the same semantic neighborhood but without a typed relation to this one — candidates for new edges or unrecognized duplicates.

• No finite system A can measure the entanglement entropy S(|AB>) across the boundary B that separates it from its environment B (Fields & Glazebrook 2023, Corollary 3.1)finding0.897
  The core impossibility result imported from quantum information theory; basis of the entire argument
• No finite system can measure the entanglement entropy across its own boundary, rendering the separability of agent from environment permanently unevidenceable.claim0.883
  Prior result from quantum information theory cited as evidence.
• entanglement entropy across boundaryconcept0.802
  A measure of quantum entanglement across the agent-environment interface; its self-measurement is impossible for finite systems.
• Action places an upper bound on the entropy of biological states, thereby conserving structural and dynamical integrity.claim0.779
  Autopoietic aspect of active inference.
• Subjectively therefore, there can be no evidence for a self separate from the world.claim0.767
  Subjective corollary of the boundary unmeasurability claim.
• The single criterion of whether everything is made of beings correlates accurately with the presence of life in the environment.hypothesis0.764
  Testable hypothesis that the being-character is a reliable indicator of experienced life.
• "[W]e must confess that perception, and what depends upon it, is inexplicable in terms of mechanical reasons... when inspecting its interior, we will find only parts that push one another, and we will never find anything to explain a perception."quote0.764
  Canonical illustration of the Hard Problem intuition that any functional/mechanical explanation faces an explanatory gap for perception
• "The boundary is the medium through which all evidence flows, but it is not itself evidenceable."quote0.764
  Pithy statement of the core impossibility result in its first-person experiential implication