
dog experiencing what may or may not resemble guilt
Rene Descartes really made a mess of things for nonhuman animals when he insisted that perceptions were a class of conscious thought (Heller-Roazen, 165). For Descartes, animals cannot really be distinguished from machines for two reasons. Firstly, they would have to be able to transmit their thoughts and opinions to us via language or some similar method of communication. Secondly, they must be capable of acting from knowledge and not as the result of having specialized organs which make them well-adapted to particular situations but inflexible when compared to the abilities of the conscious thinker. They must be able to respond thoughtfully, in other words, in a manner that cannot be construed as an automatic reaction to a stimulus. For Descartes, this cannot be conclusively demonstrated.
Animals cannot rearrange their words (when they even have the ability to utter them, which is rare in itself) or other signs in order to make new sentences. When comparing even the dimmest of human specimens to animals which seem to be intelligent and which can demonstrate speech in some way, like parrots, Descartes argues that it makes more sense to say that nonhumans have no reason whatsoever, that they are doing something altogether different than thinking, than to claim that they merely have less. Descartes makes another distinction: human beings, he explains, can use signs to express things other than passions, while animal communication is irrevocably tied to instinctive behavior.
“But in my opinion the main reason, which suggests that the beasts lack thought is the following. Within a single species some of them are more perfect than others, as men are too. This can be seen in horses and dogs, some of whom learn what they are taught much better than others. Yet, although all animals easily communicate to us, by voice or bodily movement, their natural impulses of anger, fear, hunger and so on, it has never yet been observed that any brute animal reached the stage of using real speech, that is to say, of indicating by word or sign something pertaining to pure thought and not to natural impulse. Such speech is the only certain sign of thought hidden in a body. All men use it, however stupid and insane they may be, and though they may lack tongue and organs of voice: but no animals do. Consequently it can be taken as a real specific difference between men and dumb animals” (Descartes, 4 of 4).
The bottom line for Descartes is that, since we cannot find any conclusive evidence that other animals have things like interior mental states, because they cannot demonstrate conscious thought in a manner that we would recognize as familiar (in other words, and what amounts to the same thing, because they are not human), we must conclude that, while thought cannot be conclusively denied to all nonhuman animals, it also cannot be assumed that they possess it.
“But though I regard it as established that we cannot prove there is any thought in animals. I do not think it is thereby proved that there is not, since the human mind does not reach into their hearts. But when I investigate what is most probable in this matter, I see no argument for animals having thoughts except the fact that since they have eyes, ears, tongues, and other sense-organs like ours, it seems likely that they have sensation like us: and since thought is included in our mode of sensation, similar thought seems to be attributable to them” (Descartes, 4 of 4).
So ultimately, we can neither prove nor disprove that nonhuman animals can experience complex emotional states such as happiness or guilt. To suggest that they do would be to commit the sin of anthropomorphism. Two things are happening here, and this is important because, as far as I can tell, debates in fields such as cognitive ethology have not progressed too far past this impasse (please correct me if I’m wrong here, I have not read enough in these areas yet to be confident about this): on one hand, we say that it cannot be demonstrated that nonhuman animals have thoughts. On the other hand, we define ourselves as uniquely human in large part by claiming to be the only animals capable of thinking. Then, we study other animals by trying to figure out how close they can get to being human-like thinkers, while delimiting their potential at the outset by measuring them against a standard that, by definition, they will never come close to attaining. The definition of the human here remains completely removed from consideration and completely unexamined. The debate, as it pertains to nonhuman animals, is then centered on whether we allow some tentative use of anthropomorphic language, or whether we criticize its usage in the following sort of manner:
“There is no objective theory formation or testing, no careful consideration of evidence; there is just unreflective application of human descriptions to non-humans. Anthropomorphism is a category error, some argue: the treatment of an entity (an animal) as a member of a class (things with minds) to which it does not belong; or the comparison of that entity to one (such as a human) belonging in a different category. Describing a dog as feeling guilt is like saying that ideas are green. Those who assert that there are distinctively human traits might so argue: if the trait is, by definition, what separates humans from animals, then to treat an animal as possessing the trait is a logical error. If consciousness is a defining characteristic of humans, for instance, to claim consciousness in non-humans is a category mistake” (Horowitz, 4 of 7).
Descartes’ logic in arguing that we cannot know for sure what (if anything) is happening within the minds of nonhuman animals is not really unreasonable in itself. The real problems with Descartes have to do with the narrow and limiting account he gives of the human as essentially a thinking thing, free of any complicated relationship to the body and the world it inhabits. The other problem with Descartes is that, while he had to admit that it cannot be known for certain whether or not humans are the only thinking things, he preferred to hold this opinion, and because of this he was able to devalue everything that was taken to be outside thought. No evidence of thought, no problems whatsoever with destroying animals or any other aspect of the world, for that matter.
“Please note that I am speaking of thought, and not of life or sensation. I do not deny life to animals, since I regard it as consisting simply in the heat of the heart; and I do not deny sensation, in so far as it depends on a bodily organ. Thus my opinion is not so much cruel to animals as indulgent to men—at least to those who are not given to the superstitions of Pythagoras—since it absolves them from the suspicion of crime when they eat or kill animals” (Descartes, 4 of 4).
Descartes, Rene. “Animals are Machines.” In S. J. Armstrong and R. G. Botzler, ed., Environmental Ethics: Divergence and Convergence. New York: McGraw-Hill, 1993, pp 281-285. January 20, 2010 http://home.cogeco.ca/~drheault/ee_readings/West/Descartes.pdf
Horowitz A. 2007. “Anthropomorphism.” In M. Bekoff, ed., Encyclopedia of Human-Animal Relationships. Westport, CT Greenwood Publishing Group, pp 60-66. January 20, 2010 http://crl.ucsd.edu/~ahorowit/Encyclopedia-anthrop.pdf