FFF said-
? If the aliens didn't come to earth (or there is no proof of it), how were they 'encountered'? Or~ How can you encounter an alien if it didn't come to earth (and wouldn't the encounter itself constitute proof for the believer)? The ALIEN ENCOUNTERS line is misleading? Is that what you're getting at?
All good observations, yes, and close, but no ceegar!
Laika said- Is it because you're being asked to prove a negative?
Even closer, Laika, so you win the ceegar!
It's all about who bears the burden of proof to support a claim; in this case, the "emphatic true believers in UFOs" are unable to prove their case that aliens have visited Earth, so the story should end there. Where the headline goes off the tracks is when they ask, "but can you prove they haven't?"
The unbeliever (i.e. the one listening to the believer's claim) has NO OBLIGATION to disprove anything, since as you point out the work of proving a negative falls on the one making the claim to others, and they always bear that responsibility. The job is on them to convince others to accept their claim.
Of course, the old saying is, "extraordinary claims require extraordinary evidence", and that holds for evidence of aliens visiting Earth, too, just as it does for any other extraordinary claim.
Adam
EDIT: yup, Gentledawn, we cross-posted, but you nailed it. Sorry Laika, but you've got to hand over and share the ceegar with Gentledawn, so don't bogart it!