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Proof step 3 from proof elim-data (previous step)

datakey(pageno, pageno0).data? ⊦ ∃ ino, n. datakey(pageno, pageno0) = datakey(ino, n)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 4:
⊦ ∃ ino, n. datakey(pageno, pageno0) = datakey(ino, n)

Rule argument

Additional information

Used simplifier rules: ⊦ datakey(m, m0).data?; (s)