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Proof step 21 from proof gengft (conclusion)

⊦ sk ≠ _type ∧ goodfieldandtype(r, sk, st) ∧ oktype(val, sk .fs .type, st) → (goodfieldandtype(r0, sk0, st[r -- sk, val]) ↔ goodfieldandtype(r0, sk0, st))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 1:
⊦ oktype(val, ty, st) ↔ okval(val, ty)
Proof step 20:
goodfieldandtype(r, sk, st), okval(val, sk .fs .type) ⊦ goodfieldandtype(r0, sk0, st[r -- sk, val]) ↔ goodfieldandtype(r0, sk0, st), sk = _type

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]