Indeed, that one was discussed. The session on extra terrestrial intelligent life was pretty much 45 minutes of difficult questions to think about. The goal of the session was to make us think, not provide answers (glib or otherwise.)

Even so, there were huge sections there was not time to go into. In most discussions (SF and otherwise) we recognise intelligence though the use of technology, but that is a very human-centric method. I think if we encountered alien intelligence we are very likely simply not to recognise it. It took us long enough to recognise behaviours in some animals and birds as showing intelligence, after all.