"There is no fundamental difference between man and the higher mammals in their mental faculties".

Or as Nim Chimpsky used to say: "Give orange me give eat orange me eat orange give me eat orange give me you."

A lot of work remains to be done before we can give a full scientific account of the human mind in relation to the rest of nature. It seems quite narrow minded to me, fanatical even, to deny a priori that such an account, if at all possible, would confirm a transcendental distinction between humans and the rest of nature; or would feature non-material aspects.