Note 26 — Chapter XXVII · PARMENIDES.
Reading edition
According to Stallbaum (Prolegg. pp. 277-337) the Parmenidês is the only dialogue in which Plato has discussed, with philosophical exactness, the theory of Ideas; in all the other dialogues he handles it in a popular and superficial manner. There is truth in this — indeed more truth (I think) than Stallbaum himself supposed: otherwise he would hardly have said that the objections in the Parmenides could easily have been answered, if Plato had chosen.
Stallbaum tells us, not only respecting Socher but respecting Schleiermacher (pp. 324-332), “Parmenidem omnino non intellexit”. In my judgment, Socher understands the dialogue better than Stallbaum, when he (Socher) says, that the objections in the first half bear against the genuine Platonic Ideas; though I do not agree with his inference about the spuriousness of the dialogue.