+ \condproof{Ingredients}{
+ $M \le L$ is trivial. For $M \le R$ we want
+ $\tipcn \ge \baseof{W}$.
+ Well $W \in \set S^{\pcy}$ so $W \in \allreachof{\pcn}$
+ and $W \in \pcy$. So $W \in \pendsof{\allreachof{\pcn}}{\pcy}$
+ so Base Covers Reachable indeed
+ $\tipcn \ge \baseof{W}$.
+ }
+ \condproof{Tip Merge}{ Trivial. }
+ \condproof{Merge Acyclic}{
+ By Base Acyclic, $\tipcn \nothaspatch \p$.
+ }
+ \condproof{Foreign Merges}{ Not applicable. }
+