Proklus, in his Commentary on the Parmenidês (p. 778, Stallbaum), adverts to the passage of the Republic here discussed, and endeavours to show that it is not inconsistent with the Parmenidês. He states that the exhortation to practise dialectic debate in youth, as the appropriate season, must be understood as specially and exclusively addressed to a youth of the extraordinary mental qualities of Sokrates; while the passage in the Republic applies the prohibition only to the general regiment of Guardians. But this justification is noway satisfactory; for Plato in the Republic makes no exception in favour of the most promising Guardians. He lays down the position generally. Again, in the Parmenidês, we find the encouragement to dialectic debate addressed not merely to the youthful Sokrates, but to the youthful Aristoteles (p. 137 B). Moreover, we are not to imagine that all the youths who are introduced as respondents in the Platonic dialogues are implied as equal to Sokrates himself, though they are naturally represented as superior and promising subjects. Compare Plato, Sophistês, p. 217 E; Politikus, p. 257 E.] [Footnote 184: Plato, Parmenid. p. 166 ad fin. [Greek: ei)rê/sthô toi/nun tou=to/ te kai\ o(/ti, ô(s e)/oiken, e(\n ei)/t' e)/stin, ei)te mê\ e)/stin, au)to/ te kai\ ta)/lla kai\ pro\s au)ta\ kai\ pro\s a)/llêla pa/nta pa/ntôs e)/sti te kai\ ou)k e)/sti, kai\ phai/netai te kai\ ou) phai/netai. A)lêthe/stata.]] [Footnote 185: Xenophon, Memorab. iv. 2.] [Side-note: Contradiction with the character and declarations of Sokrates.]