ὑπολειφθῇ, lit., ‘falls behind’; here =‘fails,’ like the intr. “ἐκλέλοιπεν” in 19. We need not conjecture “ὑπολείπῃ”, though the intrans. use is frequent with Aristotle. The subjunct. can follow ᾔσθου, since the thought is, ‘hast heard’ (and still hearest). For the converse (an optat. after a primary tense which implies a secondary), cp. O. C. 11 n.