\All\rs_\f, m, \mask_\f, \state.& 0 < m\leq n \land (\mask_1 \cup\mask_2) \disj\mask_\f\land k \in\wsat\state{\mask_1 \cup\mask_\f}{\rs\mtimes\rs_\f}\Ra{}\\&
\All\rs_\f, k, \mask_\f, \state.& 0 < k\leq n \land (\mask_1 \cup\mask_2) \disj\mask_\f\land k \in\wsat\state{\mask_1 \cup\mask_\f}{\rs\mtimes\rs_\f}\Ra{}\\&
\Exists\rsB. k \in\prop(\rsB) \land k \in\wsat\state{\mask_2 \cup\mask_\f}{\rsB\mtimes\rs_\f}
\Exists\rsB. k \in\prop(\rsB) \land k \in\wsat\state{\mask_2 \cup\mask_\f}{\rsB\mtimes\rs_\f}