In Doctor Dolittle's Delusion, Anderson demonstrates that animals, although having interesting properties of their own communication system, are not capable of acquiring or using human language. Using as a background HighLofting's books, Doctor Dolittle's Delusion illustrates the nature of human language against the communicative abilities of other species. Recently interviewed in the New York Times (Did the Cat Really Say 'I Vant to beAlone'? Sorry, It Said Meow - 9/17/04) Anderson argues that Rico, Koko the ape, and other animals are extremely clever but that this falls within the bounds of what we know animals can do and that these behaviors should not be considered as 'language.'