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theorem proved term proof

truth_eval_implies_totality

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formal statement (Lean)

  49theorem truth_eval_implies_totality
  50    (C : ComparisonOperator)
  51    (hT : TruthEvaluableComparison C) :
  52    ExcludedMiddle C :=

proof body

Term-mode proof.

  53  hT.determinate_continuous
  54
  55/-- Truth-evaluability of composite comparison-statements gives finite pairwise
  56composition. -/

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