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[477a] that which is not be known?” “We are sufficiently assured of this, then, even if we should examine it from every point of view, that that which entirely1‘is’ is entirely knowable, and that which in no way 'is' is in every way unknowable.” “Most sufficiently.” “Good. If a thing, then, is so conditioned as both to be and not to be, would it not lie between that which absolutely and unqualifiedly is and that which in no way is?” “Between.” “Then if knowledge pertains to that which is and ignorance of necessity to that which is not,

1 παντελῶς: cf.μηδαμῇ and 478 Dπάντως. Not foreseeing modern philology Plato did not think it necessary to repeat these qualifying adverbs in 478 B ἀδύνατον καὶ δοξάσαι τὸ μὴ ὄν, which is still sometimes quoted to prove that Plato was “yet” naively unaware of the distinction between is-not-at-all (does not exist) and is-not-this-or-that.

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