" This country has a UFO problem, after all. You might not have been aware we have one, or thought about it in these terms, but we do have a UFO problem: namely, we don't seem to understand what UFO really means. So here it is: a UFO is an unidentified flying object. So any time we see some object flying in the sky that we can't positively identify, we've seen a UFO. But in the same way the words paranormal and supernatural have been conflated, we now equate UFO with alien spacecraft.

How this came to be is easily understandable. If we've learned one thing in this book already, people don't like the unknown very much. And so, if we believe we're being visited by other civilizations, we read the piles of books and articles on unexplained lights in the sky, then fill in the massive gaps—with wild tales of alien races, interstellar technology, and government conspiracies. If we don't believe, we hear someone saw an unexplained light in the sky and assume, first, that he's claiming to have seen E.T. Then we figure what he really saw was an airplane, Venus, swamp gas, or a helicopter, and he must be a bit foolish—maybe even a UFO nut. Then we laugh. "

― Steve Volk , Fringe-ology: How I Tried to Explain Away the Unexplainable-And Couldn't