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Proof step 3 from proof not-garbage-valid-imp-empty (previous step)

⊦ aehdr = garbage, aehdr = empty, aehdr.valid?

User applied rule constructor cut

And closed the goal!

Rule argument

var: aehdr

Additional information

Used simplifier rules: gen: ⊦ ;%disj-02: ⊦ garbage ≠ aechdr(m);%disj-03: ⊦ empty ≠ aechdr(m);%test-02: ⊦ aechdr(m).valid?;