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Proof step 1 from proof contains-subex (previous step)

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

Heuristic quantifier closing applied rule all left

And closed the goal!

Rule argument

[EXRARG : pos: left 2, [QUANTTERMLIST : (mkclasstype(class))]]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ type∃(str, mkclasstype(class)) ↔ tdname+∃(str, class)])], [EXTRATERMS : (mkclasstype(class))]]