"Isn't the majority of anti-evolutionary thinking biased by
the assumption that creation is, in fact, the way it happened?"
I would agree with this, most literal creationists that I've debated against seem to follow a similar thought patern.
1) I believe in God
2) I believe in the Bible
3) The Bible says it happened this way, so thats what happened
Most people can't even give me a good explanation why one SHOULD interpret the creation account literally, especcialy in the light of good theological analysis.
By the way, I'm an evolutionary creationist...
As for any evidence, I can't point to anything beyond my own personal narrative. Most ppl will not take this for evidence at all. I can tslk to you sbout two (what seem to me) miracles that have saved my life. I can talk to you about how a relationship with my creator has changed my life. But their is nothing quantifiable about my beliefs. I really wouldn't want it any other way.
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"Science without religion is lame; religion without science is blind." - Albert Einstein