Kador, from Ultima VI
If the Avatar asked the dog for "advice," or simply to "speak," it replied by saying, "I feel that the whole debate over 'free will' versus 'determination' arises from an artificial semantic division. In light of the works of Godel and Heisenberg, it is evident that the two concepts are indistinguishable and thus, for all practical purposes identical."
Clearly, Kador was an educated animal.
If after getting it to talk once, the Avatar asked it the same keyword again, it'd only respond with a bark.