Are you going to send a man up for murder on nothing but your inferences from the physical evidence?
Physical evidence is more reliable than eye witness accounts. Of course you should already know that from participating in the
Reliability of Eyewitness Accounts thread.
Truely, you point out this fact with your statement:
Ideally you want a believable confession from your suspect.
If you can't always trust a confession, how can you eye-witness accounts any more?
- the fact that genetic variability or "plasticity" as one creationist calls it, is reduced by selection processes that isolate populations, and this reduction is increased with each further such selection until you have a new "species" which is really a genetically severely limited variation on the species it was isolated from, that is, it has the most severely limited genetic capacity for further change and adaptibility, in other words the exact opposite of what the ToE predicts.
Your ramblings on genetics here are riddled with misunderstanding - again, much of which I believe was explained to you in the first thread you participated in on your return here.
It has been well-established that small founder/bottleneck populations show increases in genetic diversity much greater than that of large parental populations. Your attempt to intuitively logic your way through the issue gave you a result quite the opposite of what is observed in reality, I'm afraid.