.... Of course the argument could be made that ... If they were intelligent ... they would have been interbreeding.
Ahhhhh .... It's amazing what the lack of one word makes in an argument ... Of course if I were intelligent enough ... I wouldn't have left out the word "NOT" for Pete's sake!!!
...My statement should have read: .... Of course the argument could be made that ... If they were intelligent ... they would NOT have been interbreeding.