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Proof step 2 from proof levelsubset-classex-02 (previous step)

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

Heuristic quantifier closing applied rule all left

And closed the goal!

Rule argument

[EXRARG : pos: left 4, [QUANTTERMLIST : (class)]]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ interface∃(str, class) → ¬ class∃(str, class)], [CSIMPSEQ : ⊦ ¬ class∃(str, class) → ( class+∃(str, class) ↔ is_predefined_class(class))], [CSIMPSEQ : ⊦ interface∃(str, class) → ¬ is_predefined_class(class)])], [EXTRATERMS : (class)]]