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Proof step 8 from proof levelsubset-trans (previous step)

interface∃(str, class0), interface∃(str0, class0), ∀ class. class∃(str, class) → class∃(str0, class), ∀ class. class∃(str0, class) → class∃(str1, class), ∀ class. interface∃(str0, class) → interface∃(str1, class) ⊦ interface∃(str1, class0)

Heuristic quantifier closing applied rule all left

And closed the goal!

Rule argument

[EXRARG : pos: left 5, [QUANTTERMLIST : (class0)]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (class0)]]