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Proof step 4 from proof same-subclasses-subclass (previous step)

class0 ≤ class, ∀ class0. interface∃(str0, class0) ∧ class0 ≤ class → interface∃(str, class0), ∀ class0. class∃(str0, class0) ∧ class0 ≤ class → class∃(str, class0) ⊦ class∃(str0, class1) ∧ class1 ≤ class0 → class∃(str, class1)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
class∃(str0, class1), class1 ≤ class0, class0 ≤ class, class1 ≤ class, ∀ class0. interface∃(str0, class0) ∧ class0 ≤ class → interface∃(str, class0), ∀ class0. class∃(str0, class0) ∧ class0 ≤ class → class∃(str, class0) ⊦ class∃(str, class1)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPFORWARD : ⊦ class1 ≤ class2 ∧ class2 ≤ class3 → class1 ≤ class3])]]