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def definition def or abbrev

PhysicalSensor

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formal statement (Lean)

 934def PhysicalSensor := { sensor : DefectSensor // PhysicallyExists sensor }

proof body

Definition body.

 935
 936/-- **RS Ontological Theorem**: every physically existing sensor has
 937charge `0`.
 938
 939This is the core RS result.  It is:
 940* Unconditional — no hypotheses beyond the subtype constraint
 941* Axiom-free — depends only on `propext`, `Classical.choice`, `Quot.sound`
 942* A direct corollary of `ontological_dichotomy`
 943
 944In RS language: the Law of Existence (T1) forces every physical recognition
 945event to have zero topological charge.  Nonzero charge requires divergent
 946cost, which T1 forbids for physically realizable ledger entries. -/

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