| is_fskey(fv .1) ∧ fv .1 .fs .class ≠ class, rk ∈ st, ∀ rk, st, class. rk ∈ st → rk ∈ addclass(class, fis0, st) ⊦ rk ∈ addclass(class, fis0, st) |
rk ∈ st, is_fskey(fv .1), ∀ rk, st, class. rk ∈ st → rk ∈ addclass(class, fis0, st) ⊦ fv .1 .fs .class = class, rk ∈ addclass(class, fis0, st)
[[CONCRETESIMPRULES : ()]]