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Proof step 5 from proof le-04 (conclusion)

⊦ `java.lang.Error' .class ≤ class ↔ ¬ ¬ (class = `java.lang.Error' .class ∨ class = `java.lang.Throwable' .class ∨ class = `java.lang.Object' .class)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 4:
⊦ `java.lang.Error' .class ≤ class ↔ class = `java.lang.Error' .class ∨ class = `java.lang.Throwable' .class ∨ class = `java.lang.Object' .class

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]