ἐπιστητός
From LSJ
ἑτέρως ἠδύνατο βέλτιον ἢ ὡς νῦν ἔχει κατεσκευάσθαι → otherwise they could have been constructed better than they are now (Galen, On the use of parts of the body 4.143.1 Kühn)
English (LSJ)
ή, όν, (ἐπίσταμαι)
A that can be scientifically known, matter of science, Pl.Tht.201d, etc.; τὸ ἐ. Arist.EN1139b23, al.: Dor. ἐπιστᾱτός Ps.Archyt. ap.Iamb.Comm.Math.8.
German (Pape)
[Seite 984] ή, όν, adj. verb. zu ἐπίσταμαι, was man wissen kann, Plat. Theaet 201 d, Arist. Eth. 6, 6 u. öfter, der τὸ ἐπιστητόν von τὸ δοξαστόν unterscheidet, Anal. post. 1, 33.