| is_fskey(fv .1) ∧ fv .1 .fs .class ≠ class, ∀ r, str, class, st. r = jvmref ∨ (junkref(str, r, addclass(class, fis0, st)) ↔ junkref(str, r, st)) ⊦ r = jvmref, junkref(str, r, addclass(class, fis0, st)) ↔ junkref(str, r, st) |
is_fskey(fv .1), ∀ r, str, class, st. r = jvmref ∨ (junkref(str, r, addclass(class, fis0, st)) ↔ junkref(str, r, st)) ⊦ fv .1 .fs .class = class, junkref(str, r, addclass(class, fis0, st)) ↔ junkref(str, r, st), r = jvmref
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