[AndrewC]

This is simply insane. When you use the word "happen" you are making assumptions about mechanisms, i.e., you are every position and every copy error is a roll of the dice. You are, in effect asserting that there are no mechanisms for conserving sequences.

No I am making no assumptions about mechanisms. I a merely describing the fact that the sequences are conserved. They are pristine. Got it? Pristine!!!! That means they are "preserved" 100%. How can we describe the chances of them being conserved by "accident"? We use tools such as BLAST. The results show that "accident" is not a mechanism.

[js1138]

We use tools such as BLAST. The results show that "accident" is not a mechanism.

The reason I use the word insane is that things that are not accidental are necessarily the result of a regular process or mechanism, yet you deny assuming a mechanism. The fact that a mechanism is unknown or not understood does not make it nonexistent. It makes it an opportunity for science.