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Proof step 8 from proof validfieldlist-rec (previous step)

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

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 7:
validfield(str, r, sk, st), sk0 ∈ sks, ∀ sk. sk ∈ sks → validfield(str, r, sk, st) ⊦ validfield(str, r, sk0, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]