I realize McStone has never run into a place where he has to actually think, and has found it too hard to continue.
Your not making any sense. Common ancestry is in complete argument with YEC. The fact that Chimpanzees even exist - and apes past and present - is an untenable position to hold for any "true" "literal" christian.
But his statement is just wrong. Why is common ancestry in complete argument with YEC? Because of the time frames required for common ancestry to exist? If that is true, can McStone tell us what time frame is required to go from a fish type body plan to a mammal type body plan? How about from the tiger/lion ancestor to tigers and lions?