| ⊦ (st[r0 -- mkfs(class, mkclasstype(class0), fieldvar) ', val][_mode]) = st[_mode] |
⊦ (st[rk0, val][rk]) = ((rk = rk0 ⊃ val; st[rk]))
⊦ ((_mode = r0 -- mkfs(class, mkclasstype(class0), fieldvar) ' ⊃ val; st[_mode])) = st[_mode]
[[CONCRETESIMPRULES : ()]]