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Proof step 13 from proof rm-vl-append-same (previous step)

lref0 = lref, ∀ n, lref. q0 + eq-entry(n, lref) ' - lref = q0 - lref ⊦ q0 + eq-entry(n, lref) ' - lref = (lref0 = lref ⊃ q0 - lref;eq-entry(m, lref0) ' + (q0 - lref))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 14:
∀ n, lref. q0 + eq-entry(n, lref) ' - lref = q0 - lref ⊦ q0 + eq-entry(n, lref) ' - lref = q0 - lref

Proof step 13 from proof rm-vl-append-same (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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