A formulation of the boundary profile using the square approximation of the cluster variation method is given in such a way that the local free energy density can be indentified clearly and comparison with Paper I can be made easily. It is pointed out that the formulation in Paper II brings in an approximation at the last stage of the method in Paper I, while the formulation in the present Paper does so at an earlier stage. Comparison of the local free energy density in this paper and that in Paper I leads to the solution of the paradox by concluding that the hump in the free energy curve is not objectionable but has a physical significance in the approximate treatment of the boundary profile.
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