[David Maes]

Of course the preference goes to the fact that it's a language problem.

But (if it shoudn't have been done yet); Could proving the fact that animals don't have it, enforce the idea that it's a language problem?
(just asking myself).

Is thinking that animals could have it, just due to the fact that people just have the ability to recognize theirselves in animals?

I also think we can learn sign-language to chimpanzees (the chimpanzee could be an ancestor of Homo Sapiens).
(it also has 99% the same DNA).