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Proof step 2 from proof contains-subex (previous step)

∀ ty1. contains(str0, ty, ty1) → type∃(str, ty1) ⊦ ∀ class1. contains(str0, ty, mkclasstype(class1)) → tdname+∃(str, class1)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 1:
contains(str0, ty, mkclasstype(class)), ∀ ty1. contains(str0, ty, ty1) → type∃(str, ty1) ⊦ tdname+∃(str, class)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]