\begin{tikzpicture}[auto,scale=\rthinning,transform shape]
	% x node set with absolute coordinates
	\node (i) at (0,0) [label=left:$i$,point];
	\node (j) at (-1,-1) [label=left:$j$,point];
	\node (k) at (1,-1) [label=right:$k$,point];
	%\node (p) at (0,2) [label=left:$p$,point];
	%\node (j) at (-2,-4) [label=left:$j$,point];
	%\node (k) at (2,-4) [label=right:$k$,point];
	\coordinate [label=below:$f_X$] (ec1) at (-1,-2);
	\coordinate [label=below:$f_X$] (ec2) at (1,-2);
	% Directed edge
	\path (i) edge[dotted] node[above,at end] {$\overset{?}{X}$} (j);
	\path (i) edge[dotted] node[above,at end] {$\overset{?}{X}$} (k);
	%\path (pj) edge node[above] {} (j);
	%\path (pk) edge node[above] {} (k);
	%\draw[dotted] (p) -- (ep);
	\draw[dotted] (j) -- (ec1);
	\draw[dotted] (k) -- (ec2);
	% Bidirected edge
	%\path[bidirected] (A) edge[bend left=60] (C);
	%\node at ($(1)!.5!(2)$) {\ldots};
\end{tikzpicture}