Almost everything has been discussed already, so I asked you whether there's anything that hasn't been yet and you obviously cannot really answer as it'd be in mind already and not an unknown idea anymore. Do you understand now?
Having real flight attendants serve real food hasn't been discussed, doesn't mean he thought of it.
Sorry, did you mean instead: ''doesn't mean he didn't think of it''? Otherwise it would just agree with my statement. You say, something hasn't been discussed yet, so that doesn't mean someone could have thought about it, yes of course, because no one has thought about it yet, it hasn't been discussed. You cannot discuss about a matter that didn't even get in people's mind.
Your answer is confusing me now!