[microgood]

The problem with convergence theory in this sense is that these features that are deemed emblematic of common ancestry are to a degree arbitrary. There is no reason for them to have emerged independently with precisely this arrangement (or even close to it, in the traits discussed above).

Except for the fact that it could have just happened that way. I understand that the historical information may bolster the assumption of common ancestry, but it certainly does not prove the assumption nor is it a testable assumption.

[AntiGuv]

Well that's true, in much that same way that, while the odds that you just so happen for no apparent reason to share many of your father's traits are infinitesimal, they aren't nonexistent.