 It is generally accepted that she did not use syntax or grammar, and that her use of language did not exceed that of a young human child.However, she scored between 70 and 90 on various IQ scales, and some experts, including Mary Lee Jensvold, claim that Koko "[used] language the same way people do".Koko was born on July 4, 1971, at the San Francisco Zoo to her biological mother Jacqueline and father Bwana.