"...I am Sephiroth, a SOLDIER of Shinra." So much for being potentially unable to communicate, as this machine obviously could. And very articulately, for that matter. "Are you an artificial intelligence?" There's a certain guilelessness to the question; rarely do the young think of actively being malicious with their questions, even if they might be a bit.. offensive.

This could be very complicated programming, but whatever long time instruction Sephiroth had about what to do with monsters, none of that included what to do about machines that can speak. They're not monsters, they're machines. "..Did you bring us here?"