Let me show you how this question of "chance" is to be understood by the Christian regarding evolution
In the Bible story of Jonah and the Whale we see a very good example of how we should look at the teachings of evolution...(or chance)...and of God's control of the universe.
In that story the person of Jonah is at one point on a ship in the middle of a great storm.
The men on the ship want to understand why this storm is so bad and who is to blame for it?, so that cast lots and the lot falls on Jonah.
Now consider this casting of the lot onto Jonah.
Was it simply "chance"?
was this part of the story only dumb luck?
Or is there something about the casting on to Jonah that makes you see God's hand in it?
THAT......that answer is how we should view the way evolution has formed all life including humans on this earth.
For because of our faith when we read about the casting of the Lot onto Jonah we see God's hand in it.
But can we prove it?......no.
There is no way to prove it was God's hand in the casting of the Lot onto Jonah....Its just due to our faith that we think that is what happened, but there is no proof.
however if a scientist were observing the men on the ship cast lots, and watched the lot fall onto Jonah, then that scientist would consider the results to be what you would expect if the casting of the lots were done in a manner consistent to the laws of probability and chance.
finally, in an answer to a lady on the question of the age of the earth,I remember that Walter's answer was, "What difference does it make?"
What Martin was saying is that it does not matter to a Christian from a faith or salvation point of view what age of the earth is.
This is because we hang our salvation and faith on the fact that there IS a God who created the earth.....and it does not matter how long ago that that happend.