2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/93473Gisin's argument against deterministic nonlinear Schroedinger equations is shown to be valid for every (formally) nonlinearizable case of the general Doebner-Goldin 2-particle equation in the following form: The time-dependence of the position probability distribution of a particle `behind the moon' may be instantaneously changed by an arbitrarily small instantaneous change of the potential `inside the laboratory'.7 pages, LaTeX, minor corrections and additionsQuantum Physicstext