\p \neq \pr \land L \nothaspatch \p : & C \nothaspatch \p
\end{cases}
$$
-
\proofstarts
~ Consider some $D \in \py$.
$D \neq C$ so $D \le C \equiv D \le L \lor D \le R^+$.
$\qed$
+\subsection{Foreign Inclusion}
+
+Consider some $D$ s.t. $\patchof{D} = \bot$.
+
+By Tip Contents for $R^+$, $D \isin R^+ \equiv D \isin R^-$.
+So by $\merge$, $D \isin C \equiv D \isin L$.
+
+xxx up to here, need new condition
+
+$D \neq C$.
+
+
+
\section{Merge}
Merge commits $L$ and $R$ using merge base $M$: