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Proof step 6 from proof validfieldlist-rec (previous step)

∀ sk0. sk0 = sk ∨ sk0 ∈ sks → validfield(str, r, sk0, st) ⊦ validfield(str, r, sk, st) ∧ (∀ sk. sk ∈ sks → validfield(str, r, sk, st))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
∀ sk0. sk0 = sk ∨ sk0 ∈ sks → validfield(str, r, sk0, st) ⊦ validfield(str, r, sk, st) ∧ (sk0 ∈ sks → validfield(str, r, sk0, st))

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]