⊦ rk .ref = jvmref → (valid⊆(str, st, st0[rk, val]) ↔ valid⊆(str, st, st0))
[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ _mode .ref = jvmref])], [EXTRATERMS : (val, _mode, st0, st, str)]]