A negative universal is a claim to the effect of "X does not exist." If X were impossible, then X would not be able to exist, however if X is possible then the only way to prove that X does not exist (supposedly) is to look in the domain where X is supposed to be but notice it's absence. That would be feasible for small domains: a room if you're looking for a turtle, but for a domain such as the universe it would be hard to check.
I believe negative universals weaken the claim that aliens have not visited us due to the fact that one could not easily check all of human history to notice the absence, nor all places around Earth. What are your thoughts on this?
I believe negative universals weaken the claim that aliens have not visited us due to the fact that one could not easily check all of human history to notice the absence, nor all places around Earth. What are your thoughts on this?
via International Skeptics Forum http://ift.tt/2tA7q4W
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