Sultan, a chimpanzee studied by wolfgang köhler, showed evidence for animal cognition. he was given a short stick that could not reach a banana, but then seemed to have an "aha!" experience. he used the short stick:
In this instance, the chimpanzee used the short stick as a tool. This is an important indicator of intelligence for any life form. The ability to realize the limitations of your own body and determine what additional things could potentially help you achieve a task is not one that all life forms are capable of.
