Under the strict logic of the Nash-Cournot equilibrium concept, the outcome may equally well fall anywhere along the entire range where RA and RB both overlie the 45°line, that is, anywhere in the range OF. (Note that Fcorresponds to the preferred X on the part of the individual least desirous of the public good, relative to its private Marginal Cost to him.) I want to argue, however, that in the spirit of 'rational expectations' we would expect to find the final equilibrium at point F, the upper limit of this range, where X = x*.