- Thu Sep 14, 2017 6:49 pm
#39751
Hi lkr123!
Answer (E) states, "Not all nonhuman primates understands tool use." This is a must be true question, so we need something that has to be the case based on the information given. The information talks only about chimpanzees and orangutang; the first plays with a screwdriver before moving on to something else, and the second uses it to open its cage. So it might seem likely that chimpanzees don't understand tool use--but we don't know this to be the case. It might be the case that when a different tool is set in front of a chimpanzee, it then uses it as we would. We don't know what would happen in that possibility.
Answer (C), by contrast ("some nonhuman primates are capable of deception"), has to be true based on the information given. Namely, we're told that "...an orangutan is likely to pretend to ignore the tool at first..." and then dismantle its own cage when the zookeeper isn't looking. The naturalist making the statements looked at how two different primates acted in particular scenarios, and by noticing the orangutan's behavior then made a conclusion about what it was likely to do. So we know that it must be true, according to the naturalist's statements, that some nonhuman primates are capable of deception (namely, because she saw orangutan doing so by pretending not to notice the tool).