| ⊦ ¬ sk ∈ fis ∧ sk ≠ _type ∧ sk ≠ _length ∧ is_fskey(sk) → (okarrays(r, fis, st[r0 -- sk, val]) ↔ okarrays(r, fis, st)) |
is_fskey(sk) ⊦ sk = _type, sk = _length, okarrays(r, fis, st[r0 -- sk, val]) ↔ okarrays(r, fis, st), sk ∈ fis
[[CONCRETESIMPRULES : ()]]