$\qed$
+\subsection{Unique Tips:}
+
+Single Parent Unique Tips applies. $\qed$
+
\subsection{Foreign Inclusion:}
Simple Foreign Inclusion applies. $\qed$
-\subsection{Foreign Contents:}
+\subsection{Foreign Ancestry:}
+
+Only relevant if $\isforeign{C}$, and in that case Totally
+Foreign Ancestry applies. $\qed$
-Only relevant if $\patchof{C} = \bot$, and in that case Totally
-Foreign Contents applies. $\qed$
+\subsection{Bases' Children:}
+Trivial.