⊦ r -- sk ∈ st → r ∈ st
r -- sk ∈ st, r ∈ st, ∀ rk0. rk0 ∈ st → rk0 .ref ≠ r ⊦ r = jvmref
[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ r ≠ jvmref → _mode ≠ r -- sk])]]