Is there a name for the rhetorical device whereby you ask a question and then list the rejected answers? For example:
"What was it then? It wasn't x, nor y, nor z. No, in fact it was . . .."
The Cicero De Imperio passage is as follows:
How was it, do you suppose, that he was able to display that excessive rapidity, and to perform that incredible voyage? For it was no unexampled number of rowers, no hitherto unknown skill in navigation, no new winds, which bore him so swiftly to the most distant lands; but those circumstances which are wont to delay other men did not delay him. No avarice turned him aside from his intended route in pursuit of some plunder or other; no lust led him away in pursuit of pleasure; no luxury allured him to seek its delights; the illustrious reputation of no city tempted him to make its acquaintance;