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Message: <blockquote data-quote="Clint_L" data-source="post: 9719532" data-attributes="member: 7035894">Further, ghosts and aliens are very different concepts.Aliens/UFOs are testable phenomena in principle, so assuming that the particular claim is framed coherently (rare), then this becomes a burden of proof issue, and Sagan's "extraordinary claims require extraordinary evidence" applies. Sadly, we've come up with zero evidence in support of any claims thus far, but it is imaginable that SETI, for example, could report an amazing discovery tomorrow that would have to be looked at very seriously (and with proper skepticism).With ghosts, there's no phenomenon to test. The claim that "ghosts are real" isn't even wrong. It's gibberish, scientifically speaking.</blockquote>