2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/90534There are some points in the reply of Horton et al. [http://stacks.iop.org/JPhysA/35/7963] to my comment [quant-ph/0202140] on their paper [quant-ph/0103114] which I cannot let stand without a response. I provide here some clarification of how much I proved about the set of points where their law of motion is ill-defined.2 pages, no figures, LaTeXQuantum Physicstext