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Proof step 1 from proof elim-pred-c (conclusion)

n ≠ 0 ⊦ m = n -1 ↔ n = m +1

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
⊦ n = n -1 +1, n = 0

Rule argument

Additional information

Used simplifier rules: sel-1: ⊦ n +1 -1 = n;