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Not only that but chimps are meat eaters; they prey upon smaller monkey species. I think it is very tenous to suppose that the nature of dental types precludes Australopithecus as hunters/meat eaters.

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I also think it's incredibly strange that he'd expect the dentition to eat meat would develop before the species actually ate meat. It's the meat eating that would develop the pressure to develop meat eating teeth. Even then, it says that their teeth were a lot like modern humans and, surprise, there are modern humans who eat raw meat both historically and even today.