\subsection{Coherence and Patch Inclusion}
+$C$ satisfies
+\gathbegin
+ C \haspatch \p \lor C \nothaspatch \p
+\gathnext
+C \haspatch \p \equiv
+ \stmtmergeof{L \haspatch \p}{M \haspatch \p}{R \haspatch \p}
+\end{gather}
+which (given Coherence of $L$,$M$,$R$) is equivalent to
$$
\begin{cases}
L \nothaspatch \p \land R \nothaspatch \p : & C \nothaspatch \p \\
If $L \in \foreign$: not applicable for $L$; nor for $R$, by Foreign Merge.
+$\qed$