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Proof step 21 from proof eval-nonexisting-path (conclusion)

r0 ∈ H, closed(H), ¬(∃ r1. path(x, r0, r1, H)) ⊦ ⟪eval#(r0, x, H; a?)⟫ (a? = none)

System applied rule normalize

And obtained the following new goals

Rule argument

Additional information

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