 Second, some researchers might be interested in designing experiments that intentionally seek to overcome existing limitations on cognitive development in non-human animals. Some might want to do basic research on the neurological development involved in language acquisition, mathematical concept acquisition, moral development, or any number of other cognitive capacities that are now limited to normally functioning human beings. Other researchers might be interested in creating chimeras in which the limitations on animal’s cognition are overcome so that they can be used as models to study diseases or injuries that impair high-level cognitive functions in humans. As noted by the NAS Committee,