We teach our children how to think. Something you failed to do here. Adam and Eve's DNA was still pure, IE. no mutations. No mutations means no geneticaly acquired birth defects. This could continue for many generations before it becomes necessary to warn about intermarrying. Even with intermarrying today birth defects are a potential problem but not a guarantee.
…or have YOU been brainwashed to assume that Bible believers aren't intelligent, critical thinkers. You'd be surprised.
That's called a "strawman" argument.
You believe in a god of your own imagination. That is a breaking of the first commandment.
Just fake science. Christians believe in good science. Life spontaneously arising from non-life is not science it is the stuff of fairy tales. Organisms spontaneously acquiring new genetic information to evolve from simple life forms to extremely complex forms is another non-scientific hypothesis. Give me real science.
You really should read the book before criticizing it. "…and he had other sons and daughters." Genesis 5:3-4
That is Roman Catholicism not Christianity. You're quite right RC is full of absurdities.