 Cook Wilson not only believed that these views are the true interpretation of Plato, but also that they are true simpliciter and he criticized Dedekind’s definition of continuity in Stetigkeit und die irrationale Zahlen (Dedekind 1872) for “not realising the truth attained so long ago in Greek philosophy that [numbers] are Universals” and not magnitudes (OPD, 250, n.1 &amp; SI, ciii) (Joseph 1948, 59–60). He never explained in any details how this critique is supposed to work against Dedekind, but provided instead lengthy and unconvincing arguments for also rejecting Russell’s logicist definition of natural numbers on similar ground (see section 8).