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Proof step 7 from proof levelsubset-trans (previous step)

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

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 6:
class∃(str, class), ∀ class. class∃(str0, class) → class∃(str1, class), ∀ class. interface∃(str0, class) → interface∃(str1, class), ∀ class. interface∃(str, class) → interface∃(str0, class), ∀ class. class∃(str, class) → class∃(str0, class) ⊦ class∃(str1, class)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]