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Proof step 28 from proof validstatfields-initundone (previous step)

⊦ (∀ sk. sk ∈ statfields(class) → validstatfield(str, sk, st)) ↔ statfields(class) = [] ∨ tdname∃(str, class), initdone(class, st)

User applied rule case distinction

And obtained the following new goals

Proof step 15:
∀ sk. sk ∈ statfields(class) → validstatfield(str, sk, st) ⊦ statfields(class) = [] ∨ tdname∃(str, class), initdone(class, st)
Proof step 27:
statfields(class) = [] ∨ tdname∃(str, class) ⊦ ∀ sk. sk ∈ statfields(class) → validstatfield(str, sk, st), initdone(class, st)

Rule argument

[CASEDARG : pos: right 1, ()]

Additional information

[[CONCRETESIMPRULES : ()]]