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Proof step 7 from proof sw-delwr (conclusion)

r ∈ H ⊦ r ≠ r0 → H[r, o] -- r0 = (H -- r0)[r, o]

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 6:
r ∈ H ⊦ r = r0, H[r, o] -- r0 = (H -- r0)[r, o]

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]