  We present an example of an infinite dimensional separable space of affine
continuous functions on a Choquet simplex that does not contain a subspace
linearly isometric to $c$. This example disproves a result stated in M. Zippin.
On some subspaces of Banach spaces whose duals are $L_1$ spaces. Proc. Amer.
Math. Soc. 23, (1969), 378-385.
