| obs(sys, d) = obs(sys0, d) ⊦ ∀ nam. usedName(nam) ∧ cdom(nam) ⇒ d ∧ observe(nam, d) → contents(sys, nam) = contents(sys0, nam) |
obs(sys, d) = obs(sys0, d), observe(nam, d), cdom(nam) ⇒ d, usedName(nam) ⊦ contents(sys, nam) = contents(sys0, nam)
[[CONCRETESIMPRULES : ()]]