2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/6385Binney (2003) has argued that two-temperature radiatively inefficient accretion flow models are unphysical because the electron-ion equipartition time is much shorter than the accretion time. I show that this conclusion is incorrect because it relies on a misidentification of the electron-ion equipartition time. I also clarify what requirements must, in fact, be satisfied to maintain a two-temperature accretion flow.submitted to MNRAS; 3 pagesAstrophysicstext