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Proof step 3 from proof app (previous step)

∀ p, ay. unique_al(ax0 + p ' + ay) → unique_al(ax0 + ay) ⊦ unique_al((p + ax0) + p0 ' + ay) → unique_al((p + ax0) + ay)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information

Used simplifier rules: ⊦ p + ax = p ' + ax;