I didn't say Martians can't be real. I said the evidence that I've encountered (obviously limited by the fact that I'm not a subject matter expert) is insufficient to overcome the threshold of doubt. I then theorized (uncharitably, I'll admit) that many people are predisposed to believe in martians because they've read too much science fiction stories which themselves are actually just metaphors for conditions of life here on Earth. I then made fun of these people, lightly I think.