1. Some of these characteristics are, of course, present to various degrees in some other animals as well. Most notably, there is extensive scientific literature examining the cognitive abilities of non-human primates and cetaceans. See generally;David Premack;INTELLIGENCE IN APE AND MAN,1976
2. Face Recognition in Primates: A Cross-Species Study, 43;Olivier Pascalis;BEHAV. PROCESSES,1998
3. Science Watch: Marine mammals master math
4. Computing Machinery and Intelligence;A M Turing;MIND,1950