| mkfs(class, void_type, fieldvar) ' ∈ sks, ∀ sk. sk ∈ sks → validstatfield(str, sk, st) ⊦ |
mkfs(class, void_type, fieldvar) ' ∈ sks, mkfs(class, void_type, fieldvar) ' ∈ sks → validstatfield(str, mkfs(class, void_type, fieldvar) ', st) ⊦
[[CONCRETESIMPRULES : ()], [EXTRATERMS : (mkfs(class, void_type, fieldvar) ')]]