"If an alien lands on your front lawn and extends an appendage as a gesture of greeting, before you get friendly, toss it an eightball. If the appendage explodes, then the alien was probably made of antimatter. If not, then you can proceed to take it to your leader."

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The evidence is overwhelming that Planet Earth is being visited by intelligently controlled extraterrestrial spacecraft. In other words, SOME UFOs are alien spacecraft. Most are not. It's clear from the Opinion Polls and my own experience, that indeed most people accept the notion that SOME UFOs are alien spacecraft. The greater the education, the MORE likely to accept this proposition

— Stanton T. Friedman