λογιστ-έον · logist-eon — LSJ
one must reckon, Vett.Val. 264.9; λ. ἀπό . . one must deduct from.., τὴν τροφὴν . . ἀπὸ τῶν ἑβδομήκοντα μνῶν . . λογιστέον D. 27.36.
one must impute, τινί τι Hld. 1.15.
one must take into account, τι Pl. Ti. 62a.
one must reason, Men. 531.9.