Life on Purpose

“Life had to have begun elsewhere in the universe; just look around at its vastness and you must confess that it is ignorant to think there is only life on earth.” This is, in a nutshell, the popular argument for aliens and UFOs today. The proponent argues from the scope of the universe and daunts the listener with the vast reaches of outer space to make them confess that, at least, the possibility of extra terrestrials is plausible. Is it? On the surface this is a good, if not simple argument by inferring from the size of the universe and our own existence to posit that life occurred elsewhere.