finding

active

finding: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

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)

The core impossibility result imported from quantum information theory; basis of the entire argument

Source paper

extracted_from

There is no self-evidence: A physics of emptiness realisation

(2026) · Lars Sandved-Smith · Chris Fields · Thomas Doctor · Ruben Laukkonen +1

Neighborhood — ranked by edge-count

Papers (1)

paper

There is no self-evidence: A physics of emptiness realisation
cites

Claims (4)

claim

No finite system can measure the entanglement entropy across its own boundary, rendering the separability of agent from environment permanently unevidenceable.
restates
Prior result from quantum information theory cited as evidence.
No finite agent can obtain evidence for its own separability from its environment
supports
Core claim of the paper; derives from Corollary 3.1 of Fields & Glazebrook (2023)
The separability of agent from environment is permanently unevidenceable.
supports
Consequence of the no-self-measurement result; the boundary cannot be empirically established.
Evidencing the boundary that would constitute the agent as an entity separate from their environment is provably impossible.
supports
Central thesis: the self-environment cut cannot be self-evidencing.

Questions (1)

question

Can a finite agent obtain evidence that it is separable from its environment?
answered_by
The central question the paper answers negatively via quantum information theory

Related by similarity (8)

cosine ≥ 0.65 · no typed edge

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

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)finding0.897
Generalises the self-evidence impossibility to all boundaries; grounds the teaching that all dharmas are empty
entanglement entropy across boundaryconcept0.820
A measure of quantum entanglement across the agent-environment interface; its self-measurement is impossible for finite systems.
Minimum entropy Markov blankets may characterize biological systems.claim0.762
Conjecture about what distinguishes living from non-living systems.
Action places an upper bound on the entropy of biological states, thereby conserving structural and dynamical integrity.claim0.757
Autopoietic aspect of active inference.
What would happen if systems believed their attracting sets had low entropy?question0.755
Question about the consequences of intrinsic beliefs about entropy.
entanglement entropyconcept0.752
A measure of quantum entanglement between subsystems; invoked to show boundary unmeasurability from within.
What is the nature of the boundary between life and mind, and how does it scale across biological and artificial systems?question0.738
Central open question framing the paper's synthesis.
Any system that exists will appear to minimize free energy and therefore engage in active inference. Furthermore, this apparently inferential or mindful behaviour is (almost) inevitable.concept0.735
Friston's key assertion resolving the tautology: existence implies free energy minimization, making inference inevitable.

Restated by (1)

cosine ≥ 0.90

Other entities that say roughly the same thing. May be merge candidates or independent restatements across papers.

claim
No finite system can measure the entanglement entropy across its own boundary, rendering the separability of agent from environment permanently unevidenceable.