Yes, and what do we do about clinical psychologists who have themselves seen such a vehicle? :-) To whom do we send them in order to satisfy the skeptic? My point being, qualified persons from every walk of life, including certain well-respected heads of state, have seen what they believed to be alien vehicles. This weights larger than the dogmatic asssertions of people who insist that if they have NOT seen something, it must therefore not exist. Their ilk have held back every advance in human understanding since the dawn of civilization.

Any new truth or understanding is first laughed at and ridiculed by the conventional mind, then resisted most strenuously and sometimes violently, and finally becomes the new status quo, after which almost everyone says "I knew it all along!"