let me clarify my original question. Can you show where anyone claims that this is how DNA is sequenced in nature? Other than Watson, that is.
You only have two options for sequencing data:
1. via an intelligent process
2. via an unintelligent process.
The math in this thread calculates the probability/improbability of option 2 (i.e., the odds of nature properly sequencing base pairs in DNA to create a sustainable life form, particularly prior to the existence of Life on this planet).