Corpus formal_theorem canonical 2026-05-27T20:53:50+00:00
Corpus v3 · Formal theorem cid005321FTH0059canonicalv1

boolean_recovery (theorem)

/-- [I.P13] Boolean recovery: a Truth4 value is classical (T or F) if and only if both sector projections agree. For classical values: forget T = true = forget_pessimistic T, forget F = false = forget_pessimistic F. For non-classical: forget B = true but forget_pessimistic B = false (sectors disagree). -/

Formalization

lean_axiom_freesorries: 0project axioms: 0
  • ModuleTauLib.BookI.Logic.BooleanRecovery
  • Declarationboolean_recovery
  • Lean toolchainleanprover/lean4:v4.x.x

Identifiers

  • Corpus ID cid005321
  • Primary alias FTH0059
  • Type Formal theorem
  • Status canonical
  • Visibility public
  • Version v1

Aliases & legacy IDs

boolean_recoveryTauLib.BookI.Logic.BooleanRecovery::boolean_recovery

Release lines

corpus_v2corpus_v3_working

Version & History

  • v1 · 2026-05-10 imported from v2 taulib declarations

Status disclaimer

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