...doesn't make it true.
This clip comes from the BAHfest. The BAHfest is the Festival of Bad Ad Hoc Hypothesis. BAHFest celebrates well-researched and cleverly-argued, but still ultimately wrong, hypotheses about evolutionary theory. Here, Tomer Ullman, presents a hypothesis that crying infants carried into battle provided an evolutionary advantage to early man. It's a humorous example of the fact that great theories do not necessarily equal truth. I'll probably show it to my Philosophy students next year as an illustration of the need to approach complex ideas with healthy scepticism.
HT The Laughing Squid.