For P < (>) 1, the CI corresponds to a peaked (sloped) intersection, and for B < (>) 1, the CI has a bifurcating (single-path) intersection. In short, a CI is peaked (sloped) if the upper surface is (is not) at a minimum in the branching plane, and it is single-path (bifurcating) if there is only one minimum (multiple minima) on the lower surface in the branching plane.