Chimps don’t just grunt out “FOOD” they direct those grunts at specific friends.   http://www.sciencedirect.com/science/article/pii/S0003347213003813   Chimpanzee food calls are directed at specific individuals   If primates were capable of vocalizing to inform a receiver about an external entity, it would represent an important element of continuity with human language. We tested experimentally whether…