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Proof step 3 from proof unique (
previous step
)
unique_al(ax + (a × d)') ⊦ ax = [], ¬ ax.first.1 ∈ ax.rest ∧ unique_al(ax.rest)
Heuristic simplifier applied rule simplifier
And obtained the following new goals
Proof step 4
:
unique_al(ax + (a × d)') ⊦ ax = [], ¬ ax.first.1 ∈ ax.rest ∧ unique_al(ax.rest)
Rule argument
Additional information