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- 1. A simple way to disprove this hypothesis (the Innateness Hypothesis) is to demonstrate that other species have the capacity to speak but for some reason simply have not developed speech.
- 2. Perhaps they can acquire grammar like humans if they could only express it some other way.
- 3. It does not follow from their lack of speech, however, that chimpanzees are incapable of language.
- 4. Chimpanzees cannot speak because, unlike homo sapiens, their vocal cords are located higher in their throats and cannot be controlled as delicately as human vocal cords.
- 5. A logical candidate for such a species is the chimpanzee, which shares 98.4% of the human genetic code.