The genitive sometimes occurs together with ἤ, and either when the genitive has a separate construction, or is a pronoun to which the ἤ clause stands as an appositive, or of which it is explanatory. Thus,
προῄει πλέον . . . ἢ δέκα σταδίων
substantive), τίς γὰρ ἂν γένοιτο ταύτης μανία_ μείζων ἢ . . . ἡμᾶς κακῶς ποιεῖν; for what madness could be greater than (
Herbert Weir Smyth [n.d.], A Greek Grammar for Colleges; Machine readable text [info] [word count] [Smyth].