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Proof step 6 from proof levelsubset-classex-03 (previous step)

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

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
class+∃(str0, class), interface∃(str, class), ∀ class. interface∃(str, class) → interface∃(str0, class), ∀ class. class∃(str, class) → class∃(str0, class) ⊦

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]