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Proof step 78 from proof contains-subspec-better (
previous step
)
⊦ type∃(str0, ty) ∧ ¬ type∃(str, ty) ∧ ty ≤ ty0 → ¬ same-subclasses-contains(ty0 .jtelemtype .class, str, str0)
Lemma
same-subclasses-contains-typeex-02