Turing Indistinguishability and the Blind Watchmaker

Harnad, Stevan (2001) Turing Indistinguishability and the Blind Watchmaker. [Book Chapter]

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Many special problems crop up when evolutionary theory turns, quite naturally, to the question of the adaptive value and causal role of consciousness in human and nonhuman organisms. One problem is that -- unless we are to be dualists, treating it as an independent nonphysical force -- consciousness could not have had an independent adaptive function of its own, over and above whatever behavioral and physiological functions it "supervenes" on, because evolution is completely blind to the difference between a conscious organism and a functionally equivalent (Turing Indistinguishable) nonconscious "Zombie" organism: In other words, the Blind Watchmaker, a functionalist if ever there was one, is no more a mind reader than we are. Hence Turing-Indistinguishability = Darwin-Indistinguishability. It by no means follows from this, however, that human behavior is therefore to be explained only by the push-pull dynamics of Zombie determinism, as dictated by calculations of "inclusive fitness" and "evolutionarily stable strategies." We are conscious, and, more important, that consciousness is piggy-backing somehow on the vast complex of unobservable internal activity -- call it "cognition" -- that is really responsible for generating all of our behavioral capacities. Hence, except in the palpable presence of the irrational (e.g., our sexual urges) where distal Darwinian factors still have some proximal sway, it is as sensible to seek a Darwinian rather than a cognitive explanation for most of our current behavior as it is to seek a cosmological rather than an engineering explanation of an automobile's behavior. Let evolutionary theory explain what shaped our cognitive capacity (Steklis & Harnad 1976; Harnad 1996, but let cognitive theory explain our resulting behavior.

Item Type:Book Chapter
Keywords:consciousness, Turing Test, evolution, cognition, sociobiology, evolutionary psychology, causation
Subjects:Biology > Evolution
Psychology > Cognitive Psychology
Psychology > Evolutionary Psychology
ID Code:1615
Deposited By: Harnad, Stevan
Deposited On:19 Jun 2001
Last Modified:11 Mar 2011 08:54

References in Article

Select the SEEK icon to attempt to find the referenced article. If it does not appear to be in cogprints you will be forwarded to the paracite service. Poorly formated references will probably not work.

Alcock, J. E. 1987. "Parapsychology: Science of the anomalous or search for the soul?" Behavioral and Brain Sciences

.10: 553 - 643.

Baker, R. 1996. Sperm wars : infidelity, sexual conflict and other bedroom battles . London : Fourth Estate, 1996.

Barkow, J., Cosmides, L. and Tooby, J. 1992. (eds.) The Adapted Mind: Evolutionary psychology and the generation of

culture. NY: Oxford University Press.

Catania, A.C. & Harnad, S. (eds.. "1988. The Selection of Behavior: The Operant Behaviorism of BF Skinner:

Comments and Consequences. New York: Cambridge University Press.

Church A, 1936. "An unsolvable problem of elementary theory." American Journnal of Mathematics . 58: 345-63.

Dawkins, Richard. 1989. The selfish gene. Oxford ; New York : Oxford University Press

Dawkins, Richard 1986. The blind watchmaker. NY: Norton.

Dennett, D. C. 1983. "Intentional systems in cognitive ethology: The "Panglossian paradigm" defended." Behavioral &

Brain Sciences 6: 343-390.

Dennett, D. C. 1984. Elbow room : the varieties of free will worth wanting . Cambridge, Mass. : MIT Press

Dennett, D.C. 1994. "Cogntitive Science as Reverse Engineering: Several Meanings of "Top Down" and "Bottom Up."" In:

Prawitz, D., & Westerstahl, D. (Eds.) International Congress of Logic, Methodology and Philosophy of Science.

Dordrecht: Kluwer International Congress of Logic, Methodology, and Philosophy of Science (9th: 1991)

Dennett, D. C. 1995. Darwin's dangerous idea : evolution and the meanings of life . London ; New York : Allen Lane

Fernald RD 1997. "The evolution of eyes". Brain Behavior and Evolution 50: 253-259

Gopnik, A 1993. "How we know our minds: The illusion of first-person knowledge of intentionality". Behavioral & Brain

Sciences 16: 29-113.

Gould, S J. 1994. "The spandrels of San Marco and the panglossian paradigm: A critique of the adaptationist programme.

In: Sober, E. (Ed.). Conceptual issues in evolutionary biology,.Second edition. Cambridge MA: MIT Press

Massachusetts, Pp. 73-90. [Reprinted from Proceedings of the Royal Society B, London 205: 581. 1979.]

Harnad, S. 1982. "Consciousness: An afterthought". Cognition and Brain Theory . 5: 29 - 47.

Harnad, S. 1987. (ed.) Categorical Perception: The Groundwork of Cognition. New York: Cambridge University Press.

Harnad, S. 1989. "Minds, Machines and Searle". Journal of Theoretical and Experimental Artificial Intelligence 1: 5-25.

Harnad, S. 1990. "The Symbol Grounding Problem". Physica D 42: 335-346.

Harnad, S. 1991. "Other bodies, Other minds: A machine incarnation of an old philosophical problem". Minds and

Machines 1: 43-54.

Harnad, S. 1992a. Connecting Object to Symbol in Modeling Cognition. In: A. Clarke and R. Lutz (Eds. Connectionism in

Context. Springer Verlag.

Harnad, S. 1992b. "The Turing Test Is Not A Trick: Turing Indistinguishability Is A Scientific Criterion". SIGART Bulletin

3(4. "(October. "9 - 10.

Harnad, S. 1993a. "Artificial Life: Synthetic Versus Virtual". Artificial Life III. Proceedings, Santa Fe Institute Studies in

the Sciences of Complexity. Volume XVI.

Harnad S. 1993b. Discussion (passim. In: Bock, G.R. & Marsh, J. (Eds.) Experimental and Theoretical Studies of

Consciousness. CIBA Foundation Symposium 174. Chichester: Wiley

Harnad, S. 1994a. "Levels of Functional Equivalence in Reverse Bioengineering: The Darwinian Turing Test for Artificial

Life". Artificial Life 1(3): 293-301.

Harnad, S. 1994b. "Computation Is Just Interpretable Symbol Manipulation: Cognition Isn't". Special Issue on "What Is

Computation" Minds and Machines 4:379-390

Harnad, S, 1995a. Does the Mind Piggy-Back on Robotic and Symbolic Capacity? In: H. Morowitz (ed.) The Mind, the

Brain, and Complex Adaptive Systems. Santa Fe Institute Studies in the Sciences of Complexity. Volume XXII. P.


Harnad, S. 1995b. Grounding Symbolic Capacity in Robotic Capacity. In: Steels, L. and R. Brooks (eds.) The Artificial

Life Route to Artificial Intelligence: Building Embodied Situated Agents. New Haven: Lawrence Erlbaum. Pp. 277-286.

Harnad, S. 1995c. "Why and How We Are Not Zombies". Journal of Consciousness Studies 1: 164-167.

Harnad, S. 1996. The Origin of Words: A Psychophysical Hypothesis In Velichkovsky B & Rumbaugh, D. (Eds.)

Communicating Meaning: Evolution and Development of Language. NJ: Erlbaum: pp 27-44.

Harnad, S. Hanson, S.J. & Lubin, J. 1995. Learned Categorical Perception in Neural Nets: Implications for Symbol

Grounding. In: V. Honavar & L. Uhr (eds. Symbol Processors and Connectionist Network Models in Artificial

Intelligence and Cognitive Modelling: Steps Toward Principled Integration. Academic Press. pp. 191-206.

Libet, B. 1985. "Unconscious cerebral initiative and the role of conscious will in voluntary action". Behavioral and Brain

Sciences 8: 529-566.

Nagel, T. 1974. "What is it like to be a bat?" Philosophical Review 83: 435 - 451.

Nagel, T. 1986. The view from nowhere. New York: Oxford University Press.

Premack, D. & Woodruff, G. 1978. "Does the chimpanzee have a theory of mind?" Behavioral & Brain Sciences 1:


Pylyshyn, Z. W. 1984. Computation and cognition. Cambridge MA: MIT/Bradford

Shields, WM & Shields, LM. 1983. "Forcible rape: An evolutionary perspective". Ethology & Sociobiology 4: 115-136.

Steklis, H.D. & Harnad, S. 1976. From hand to mouth: Some critical stages in the evolution of language. In: Harnad, S.,

Steklis, H. D. & Lancaster, J. B. (eds.) Origins and Evolution of Language and Speech. Annals of the New York

Academy of Sciences 280: 445 - 455.

Thornhill, R & Thornhill, Nancy W. 1992) The evolutionary psychology of men's coercive sexuality". Behavioral and

Brain Sciences 15: 363-421.

Turing A.M. 1937. "On computable numbers". Proceedings of the London Mathematical Society 2 42: 230-65

Turing, A. M. 1964. Computing machinery and intelligence. In: Minds and machines. A. Anderson (ed.), Engelwood Cliffs

NJ: Prentice Hall.

Van den Berghe, PL. 1983. "Human inbreeding avoidance: Culture in nature". Behavioral and Brain Sciences 6: 91-123.


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