Sorry it took me a while to reply to you earlier. If you don't mind, I'd like to continue our discussion.
You claimed that if evolution is true, there is no sin. I asked you why you think that follows, for I don't see it.
You then asked me if I believe if sin. I answered yes.
Would you mind, then, explaining to me why you think evolution implies there is no sin? I'd really like to know the basis of your reasoning.
First off, what is sin ... to you? To me, it any deviation from the will of God, as so thoroughly discussed in the Bible. Sin in short is akin to asking the question: what is God's preference as I weigh my options, and then doing what God has previously defined as sinful.
The reason I said w/ evolution, there is no sin is as follows: it denies an entry point for sin. Sin's entry point into the Human world is via Adam. Evolution makes a claim about the origin of "Adam", which contradicts what the Bible says about his origin. Without Adam, you have no sin. You may of course have lawlessness. But not sinfulness.