Anthropologist: Many people think that if human language evolved, then something like it must be present in those species most closely related to humans, such as chimpanzees.
Opposing Evidence
Both humans and chimpanzees evolved from a common ancestor.
Opposing Point
Chimpanzees are indeed closely related to humans.
Evidence
Humans did not evolve from chimpanzees.
Conclusion
It simply does not follow that chimpanzees have anything like human language.