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Proof step 63 from proof replayorphans-prepost (previous step)

ri ⊖ ro = ri1 ⊖ ro1, ro.inodes?, ro1.inodes?, key ∈ ro, key ∈ ro1, ro ⊆ ro1 ⊦ # ro = 0, # ro1 = 0, ro1 = ∅, ∃ key. key ∈ ro

Heuristic quantifier closing applied rule exists right

And closed the goal!

Rule argument

pos: right 4 terms: key

Additional information

Used terms: key