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Proof step 15 from proof validfield-levelsubset (conclusion)

⊦ validfield(str, r, sk, st) ∧ level⊆(str, str0) → validfield(str0, r, sk, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 14:
level⊆(str, str0), validfield(str, r, sk, st) ⊦ validfield(str0, r, sk, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]