ἀποδιοριστέον
From LSJ
ἀσκεῖν περὶ τὰ νοσήματα δύο, ὠφελεῖν ἢ μὴ βλάπτειν → strive, with regard to diseases, for two things — to do good, or to do no harm | as to diseases, make a habit of two things — to help, or at least, to do no harm
English (LSJ)
A one must mark off, separate, τινά τινος Sever.Clyst.p.35D.
Spanish (DGE)
hay que separar ἕτερον ἑτέρου Seuer.Clyst.p.35.