Why?
Because the idea of alien life that visited us covertly is solipsistic and irrelevant. If it does not matter one way or the other, we have to assume that the most elegant case (no visitation) is right.
Because the idea of alien life that visited us covertly is solipsistic and irrelevant. If it does not matter one way or the other, we have to assume that the most elegant case (no visitation) is right.
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