(December 27, 2015 at 2:27 am)Anomalocaris Wrote: No, no credible evidence of alien having visited earth simply means it can not be asserted that aliens have in fact visited earth. It does not mean it could therefore be asserted that aliens in fact did not visit earth.
By the same token, we should hold out the possibility that honeybees are fluent in Sanskrit - simply because there's no evidence that they speak it doesn't mean that they don't. One might as well assert the possibilities of leprechauns, hobbits, sharks manufacturing bowler hats, or pandas composing long, involved discourses on the moral conflicts inherent in Dostoyevsky.
Whether or not aliens have ever visited our planet isn't a logic puzzle. Physical phenomena require either physical evidence or compelling arguments, neither of which is present in the case of alien visitation. When I ask, 'Do you believe that ETs have ever visited Earth?' and I get a yes, I'm immediately going to ask 'Why?'. If the answer to that question is, 'Because there's no way to prove they haven't', I'm going to hit my respondent repeatedly over the head with a critical thinking textbook.
Boru
‘I can’t be having with this.’ - Esmeralda Weatherwax