[CarolinaGuitarman]

"Read a textbook on molecular biology (especialy the chapters on error rates of DNA polymerases) and then come back here and discuss this point with some knowledge on your part."

What's your point? There still is no way to make any reasonable calculations about the probabilities of life forming through abiogenesis, or about the subsequent evolution of that life over the last 4 billion years. Anybody who says there is is talking through their posteriors.

[Wacka]

Have you even taken any biology classes?
DNA polymerases have known error rates (even with proofreading enzymes available). From this error rate and the changes in the DNA sequence of a gene betwen two organisms, their interrelatedness and the time back to a common ancestor can be determined.
Genes that code for histones, proteins that the DNA wraps around to compact itself into chromosomes are among the most conserved genes found. Their basic function was set billions of years ago and mutations that disrupt this function are removed from the population because the organism cannot reproduce.
These errors in polymerase function are what allow us to determine identity by DNA profiling. Your DNA is NOT identical to anyone else's, even your identical twin. You have accumulated mutations in your germ cells while growing up.

Please read up on it .