human non human languages bearing question primate language skills observation appear imitate manner something controverting monkey see monkey saw clue people cultures languages primates came national geographic series primate research saw weeks ago shown chimps using sticks poke holes beehive suck honey introducing topic tool use next segment researcher candy table surrounded sort cage vertical bars primitive kind rake three widespaced tines resting table handle bars chimp adjacent section table tines could nt get candy widespaced tines could nt retain researcher demonstrated flipping rake back rake table top easy pull candy one hand matter often saw chimp nt get inference experiments primate perceives use tool accomplish end attend manner using tool next segment similar setup small child child fails tines adult demonstrates flipping rake child immediately next turn even moving rake curving path much like executed adult rake capture object block pull back edge support hypothesis believe observations cultural differences one community primates another comparable differences human body language style linguistic dialect differences manner things functionally inconsequential differences things way things way bruce nevin bn lightstream com