Why are other civilizations ignored in the Bible?

[Tonus]

Then Spider Woman made all the plants, the flowers, the bushes, and the trees. Likewise she made the birds and animals, again using earth and singing the Creation Song. When all this was done, she made human beings, using yellow, red, white, and black earth mixed with her saliva. Singing the Creation Song, she made four men, and then in her own form she made four women.

Having finished her work, she embarked on a new career:

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Of course real evidence can be explained away. Humans possess great imaginations.

This is true, though it leaves us back at square one. After all, in the same way that people can dismiss evidence that leads to conclusions they don't like, they can also accept evidence if it leads to conclusions they desire to be true. A person who follows that path rigidly enough will accept only the evidence that supports what they desire and will dismiss the evidence that undermines that hope. My understanding is that psychologists have discovered that our brains work this way by default, and that we try to reinforce our beliefs in exactly this manner.

Therefore, any evidence that can be explained away is simply insufficient.