It’s the evidence from Sagan’s fiction and other popular writing that is especially provocative.
The fact that we can’t identify the UAPs, in light of our own “limited scientific imagination,” should not be permitted to manipulate us into a false dilemma.
Was C. S. Lewis an enemy of science? The apparent answer to this question is no.
James Lovelock has pointed out that atmospheric levels of oxygen much above about 25 percent, let alone 30 percent, would cause raging conflagrations today.
The error is not completely different from imagining that natural selection really can do what creative intelligence — foresight! — can do.