So what evidence would it take to convince you of a common ancestor?
You are begging the question. Presumably at this point you know that I am a YEC and to answer your question I have to assume that your belief is correct. So first of all, I don’t believe there will ever be any evidence of a common ancestor between two different kinds of animals. That is like asking you, what kind of evidence it would take to convince you of special creation.
I see now where your question came from. Let me rephrase, I rejected the idea of a common ansector because there was no evidence. This led me to my current beliefs. I NOW am a YEC because I believe the evidence we do have is more consistent with that and because of my beliefs that the Bible is clear on the subject. I have admitted my bias. Now I would like to see an evolutionist on these threads that was willing to do the same.