It is argued that, based on Kant's descriptive metaphysics, one can prescribe the necessary metaphysical underpinnings for the possibility of conscious experience in an artificial system. This project is developed by giving an account of the a priori concepts of the understanding in such a system. A specification and implementation of the nomological conditions for a conscious system allows one to know a priori that any system possessing this structure will be conscious; thus enabling us to avoid possible false-indicators of (...) consciousness like that offered in a behaviouristic analysis. This is an alternative approach to the bottom-up or top-down approaches adopted by, for example CYC (Lenat and Feigenbaum 1992) and COG (Brooks 1994; Brooks and Stein 1993), neither of which, alone, or in some hybrid form, have proved productive. (shrink)

The concept of preadaptation, though useful, continues to trouble evolutionary scientists. Usually, it is treated as if it were really adaptation, prompting such diverse theorists as Gould and Vrba, and Dennett to suggest its removal from evolutionary theory altogether. In this paper, I argue that the as-if sense is ill-founded, and that the sense of preadaptation as a process may be defended as unequivocal and generally useful in evolutionary explanations, even in such problem areas as human evolution.

Against the view that symbol-based semiosis is a human cognitive uniqueness, we have argued that non-human primates such as African vervet monkeys possess symbolic competence, as formally defined by Charles S. Peirce. Here I develop this argument by showing that the equivocal role ascribed to symbols by “folk semiotics” stems from an incomplete application of the Peircean logical framework for the classification of signs, which describes three kinds of symbols: rheme, dicent and argument. In an attempt to advance in the (...) classifying semiotic processes, Peirce proposed several typologies, with different degrees of refinement. Around 1903, he developed a division into ten classes. According to this typology, symbols can be further analysed in three subclasses (rheme, dicent, argument). I proceed to demonstrate that vervet monkeys employ dicent symbols. There are remarkable implications of this argument since ‘symbolic species theory’ fails to explore the vast Peircean semiotic philosophy to frame questions regarding the emergence and evolution of symbolic processes. (shrink)

Severity of Test (SoT) is an alternative to Popper's logical falsification that solves a number of problems of the logical view. It was presented by Popper himself in 1963. SoT is a less sophisticated probabilistic model of hypothesis testing than Oaksford & Chater's (O&C's) information gain model, but it has a number of striking similarities. Moreover, it captures the intuition of everyday hypothesis testing.

The aim of this paper is to show that humanlanguage is context-dependent in a veryspecific way. In order to support this thesis,a detailed comparison is made between the waysin which verbal expressions depend on thecontext of occurrence and evaluation and animalcommunication systems. The comparisonhighlights a series of analogies anddifferences between human language and thecommunication systems of other animals. Myproposal is to use the term `indexicality' toindicate the characteristic way of using thecontext in human language and to use the moregeneral phrase (...) `context-dependence' for thecorresponding phenomenon in animalcommunication systems. (shrink)

Human cognition requires coping with a complex and uncertain world. This suggests that dealing with uncertainty may be the central challenge for human reasoning. In Bayesian Rationality we argue that probability theory, the calculus of uncertainty, is the right framework in which to understand everyday reasoning. We also argue that probability theory explains behavior, even on experimental tasks that have been designed to probe people's logical reasoning abilities. Most commentators agree on the centrality of uncertainty; some suggest that there is (...) a residual role for logic in understanding reasoning; and others put forward alternative formalisms for uncertain reasoning, or raise specific technical, methodological, or empirical challenges. In responding to these points, we aim to clarify the scope and limits of probability and logic in cognitive science; explore the meaning of the explanation of cognition; and re-evaluate the empirical case for Bayesian rationality. (shrink)

Welfare biology is the study of living things and their environment with respect to their welfare. Despite difficulties of ascertaining and measuring welfare and relevancy to normative issues, welfare biology is a positive science. Evolutionary economics and population dynamics are used to help answer basic questions in welfare biology : Which species are affective sentients capable of welfare? Do they enjoy positive or negative welfare? Can their welfare be dramatically increased? Under plausible axioms, all conscious species are plastic and all (...) plastic species are conscious. More complex niches favour the evolution of more rational species. Evolutionary economics also supports the common-sense view that individual sentients failing to survive to mate suffer negative welfare. A kind of God-made fairness between species is also unexpectedly found. The contrast between growth maximization, average welfare, and total welfare maximization is discussed. It is shown that welfare could be increased without even sacrificing numbers. Since the long-term reduction in animal suffering depends on scientific advances, strict restrictions on animal experimentation may be counter-productive to animal welfare. (shrink)

Anthropomorphism is the methodology of attributing human-like mental states to animals. Zoomorphism is the converse of this: it is the attribution of animal-like mental states to humans. Zoomorphism proceeds by first understanding what kind of mental states animals have and then attributing these mental states to humans. Zoomorphism has been widely used as scientific methodology especially in cognitive neuroscience. But it has not been taken seriously as a philosophical explanatory paradigm: as a way of explaining the building blocks of the (...) human mind. The philosophical explanatory paradigm of zoomorphism may not explain all aspects of human behavior, but if we accept the zoomorphic way of thinking about the human mind, we should only posit new, different kinds of mental states if the zoomorphic attribution of animal mental states fails to explain our behavior. (shrink)

The explanatory gap and theknowledge argument are rooted in the conflationof propositional and phenomenal knowledge. Thebasic knowledge argument is based on theconsideration that ``physical information'' aboutthe nervous system is unable to provide theknowledge of a ``color experience'' . The implication is that physicalism isincomplete or false because it leaves somethingunexplained. The problem with Jackson'sargument is that physical information has theform of highly symbolic propositional knowledgewhereas phenomenal knowledge consists in innateneurophysiological processes. In addition totheir fundamental epistemological differences,clinical, anatomical, pathological and brainimaging (...) studies demonstrate that phenomenal andpropositional knowledge are fundamentallydifferent neurobiological processes. Propositional knowledge is phylogeneticallynew, highly symbolic, culturally acquired,exclusively human and expressible in differentnatural and artificial languages. By contrast,phenomenal knowledge consists inqualitative experiences and phenomenal conceptsthat provide an internal, language-independentreference to the properties of objects and theneeds of the organism. Language andpropositional knowledge are exclusively humanattributes implemented in specific regions ofthe dominant hemisphere. This contrastssharply with the phylogenicallysensory areas that are common to animals andhumans, which implement qualitativeexperiences. Experiences are hard-wiredneurobiological processes that can neither betransmitted nor re-created through thesymbolism of propositions. Thus, I concludethat the fallacy in the explanatory gap and inthe knowledge argument is a fallacy ofequivocation that results from ignoringfundamental neurobiological differences betweenphenomenal and propositional knowledge. (shrink)

In the current debates about zoosemiotics its relations with the neighbouring disciplines are a relevant topic. The present article aims to analyse the complex relations between zoosemiotics and cognitive ethology with special attention to their establishers: Thomas A. Sebeok and Donald R. Griffin. It is argued that zoosemiotics and cognitive ethology have common roots in comparative studies of animal communication in the early 1960s. For supporting this claim Sebeok’s works are analysed, the classical and philosophical periods of his zoosemiotic views (...) are distinguished and the changing relations between zoosemiotics and cognitive ethology are described. The animal language controversy can be interpreted as the explicit point of divergence of the two paradigms, which, however, is a mere symptom of a deeper cleavage. The analysis brings out later critical differences between Sebeok’s and Griffin’s views on animal cognition and language. This disagreement has been the main reason for the critical reception and later neglect of Sebeok’s works in cognitive ethology. Sebeok’s position in this debate remains, however, paradigmatic, i.e. it proceeds from understanding of the contextualisation of semiotic processes that do not allow treating the animal mind as a distinct entity. As a peculiar parallel to Griffin’s metaphor of “animal mind”, Sebeok develops his understanding of “semiotic self” as a layered structure, characterised by an ability to make distinctions, foremost between itself and the surrounding environment. It appears that the history of zoosemiotics has two layers: in addition to the chronological history starting in 1963, when Sebeok proposed a name for the field, zoosemiotics is also philosophically rooted in Peircean semiotics and German biological philosophy. It is argued that the confrontation between zoosemiotics and cognitive ethology is related to different epistemological approaches and at least partly induced by underlying philosophical traditions. (shrink)

There is considerable debate in comparative psychology and philosophy over whether nonhuman animals can attribute beliefs. The empirical studies that suggest that they can are shown to be inconclusive, and the main philosophical and empirical arguments that purport to show they cannot are shown to be invalid or weak. What is needed to move the debate and the field forward, it is argued, is a fundamentally new experimental protocol for testing belief attribution in animals, one capable of distinguishing genuine belief-attributing (...) subjects from their perceptual-state attributing and behavior-reading counterparts. Such a protocol is outlined and defended. The rest, it is argued, is in the hands of experimentalists. (shrink)

Modern semiotics is a branch of logics that formally defines symbol-based communication. In recent years, the semiotic classification of signs has been invoked to support the notion that symbols are uniquely human. Here we show that alarm-calls such as those used by African vervet monkeys (Cercopithecus aethiops), logically satisfy the semiotic definition of symbol. We also show that the acquisition of vocal symbols in vervet monkeys can be successfully simulated by a computer program based on minimal semiotic and neurobiological constraints. (...) The simulations indicate that learning depends on the tutor-predator ratio, and that apprentice-generated auditory mistakes in vocal symbol interpretation have little effect on the learning rates of apprentices (up to 80% of mistakes are tolerated). In contrast, just 10% of apprentice-generated visual mistakes in predator identification will prevent any vocal symbol to be correctly associated with a predator call in a stable manner. Tutor unreliability was also deleterious to vocal symbol learning: a mere 5% of “lying” tutors were able to completely disrupt symbol learning, invariably leading to the acquisition of incorrect associations by apprentices. Our investigation corroborates the existence of vocal symbols in a non-human species, and indicates that symbolic competence emerges spontaneously from classical associative learning mechanisms when the conditioned stimuli are self-generated, arbitrary and socially efficacious. We propose that more exclusive properties of human language, such as syntax, may derive from the evolution of higher-order domains for neural association, more removed from both the sensory input and the motor output, able to support the gradual complexification of grammatical categories into syntax. (shrink)

The concept of service found in Christian theism and related religious perspectives offers robust support for a political defense of nonhuman animal rights, both in the eschaton and in the present state. By adapting the political theory defended by Donaldson and Kymlicka to contemporary theological models of the afterlife and of human agency, I defend a picture of heaven as a harmoniously structured society where humans are the functional leaders of a multifaceted, interspecies citizenry. Consequently, orthodox religious believers (concerned with (...) promoting God’s will “on Earth as it is in Heaven”) have a duty to promote and protect the interests of nonhuman creatures in the present, premortem state. (shrink)

The Linda paradox is a key topic in current debates on the rationality of human reasoning and its limitations. We present a novel analysis of this paradox, based on the notion of verisimilitude as studied in the philosophy of science. The comparison with an alternative analysis based on probabilistic confirmation suggests how to overcome some problems of our account by introducing an adequately defined notion of verisimilitudinarian confirmation.

This paper’s outline is as follows. In sections 1-3 I give an exposi¬tion of the Mind-Body Problem, with emphasis on what I believe to be the heart of the problem, namely, the Percepts-Qualia Nonidentity and its incompatibility with the Physical Closure Paradigm. In 4 I present the “Qualia Inaction Postulate” underlying all non-interactionist theo¬ries that seek to resolve the above problem. Against this convenient postulate I propose in section 5 the “Bafflement Ar¬gument,” which is this paper's main thesis. Sections 6-11 (...) critically dis¬cuss attempts to dismiss the Bafflement Argument by the “Baf¬flement=Mis¬perception Equation.” Section 12 offers a refutation of all such attempts in the form of a concise “Asymmetry Proof.” Section 13 points out the bearing of the Bafflement Argument on the evolutionary role of consciousness while section 14 acknowledges the price that has to be paid for it in terms of basic physical principles. Section 15 summarizes the paper, pointing out the inescapability of interactionist dualism. (shrink)

In the early twentieth century psychology became the study of "behavior." This article reviews developments within animal psychology, functional psychology, and American society and culture that help explain how a term rarely used in the first years of the century became not only an accepted scientific concept but even, for many, an all-encompassing label for the entire subject matter of the discipline. The subsequent conceptual and linguistic activity of John B. Watson, Edward C. Tolman, Clark L. Hull, and B.F. Skinner, (...) as they attempted to explain "behavior" throughout the course of the twentieth century, is then discussed. Finally, the article suggests the need for greater conceptual and linguistic diversity in psychology. In this last regard, reference is made to cognition and consciousness, to William James and John Dewey, and to the fact that prediction and control might not be the most relevant aims of contemporary psychology. (shrink)

We consider the relationship between neural and behavioural evidence for animal consciousness. We critically examine two recent studies: one neural and one behavioural. The first, on crows, finds different neural activity depending on whether a stimulus is reported as seen or unseen. However, to implicate this neural activity in consciousness, we must assume that a specific conditioned behaviour is a report of conscious experience. The second study, on macaques, records behaviours strikingly similar to patterns of conscious and unconscious perception in (...) humans. However, confounds are only ruled out in human subjects, presupposing substantial neural similarity between humans and macaques. Taken together, the two studies reveal a sense in which neural and behavioural research rely on each other. Looking ahead, these two types of evidence could prove to be either mutually reinforcing or mutually undermining. The science of animal consciousness needs both neural and behavioural evidence, ideally obtained as part of a single coordinated programme. (shrink)

When we ask the question whether animals have their own folk psychology, we’re asking whether any other species has a commonsense conception of psychological phenomenon. Different versions of this question have been discussed over the past 25 years, but no clear answer has emerged. Perhaps one reason for this lack of progress is that we don’t clearly understand the question. I defend a two-fold view of folk psychology that takes as central the capacity to engage in some folk psychological practices (...) (e.g. predicting, explaining, coordinating, justifying, etc.) and the capacity to see another as minded. Given this account, I argue that chimpanzees, as intentional agents who engage in folk psychological practices and have some understanding of others as minded agents, are folk psychologists. -/- . (shrink)

In our dealings with animals at least most of us see them as conscious beings. On the other hand the employment of human categories to animals seems to be problematic. Reflecting on the details of human beliefs, for example, casts serious doubt on whether the cat is able to believe anything at all. These theses try to reflect on methodological issues when investigating animal minds. Developing a theory of animal mentality seems to be a test case of the interdisciplinary research (...) programme in cognitive science. From the philosopher`s perspective the most pressing problem is how to talk about animal minds. Can we just employ the vocabulary of human psychology? If not, exploring animal minds contains the non-trivial task of introducing a terminology that allows to see the distinctness of animal minds and to see its connection to the human case. The treatment of some topic in cognitive science has to reach a reflective equilibrium between our intuitions, a phenomenological approach, philosophical conceptual analysis, various empirical approaches and model building. Reflective equilibrium means in this context that we have to reach a coherent model which incorporates as much of our intuitions concerning animal consciousness and integrates at the same time the findings of the different co-operating sciences. There can be various trade-offs in case of conflict between, say, philosophical definitions of mental terms as to be applied to animals, neurophysiology, our reflected intuitions and ethological model building based on a computational theory of animal minds. The paper gives an example of reflective equilibrium in discussing the case for awareness in vertebrates. It considers the role of evolutionary reasoning. The main focus lays on two examples of comparing our human notions with corresponding abilities in animals, and how an appropriate conceptual apparatus dealing with the abilities of animals could be introduced. (shrink)

Psychology, according to a standard dictionary definition, is the science of mind and behavior. For a major part of the twentieth century, (nonhuman) animal psychology was on a behavioristic track that explicitly denied the possibility of a science of animal mind. While many comparative psychologists remain wedded to behavioristic methods, they have more recently adopted a cognitive, information-processing approach that does not adhere to the strictures of stimulus-response explanations of animal behavior. Cognitive ethologists are typically willing to go much further (...) than comparative psychologists by adopting folk-psychological terms to explain the behavior of nonhuman animals. This different attitudes of many scientists presupposes a distinction between cognitive and mental state attributions that is not commonly articulated. This paper seeks to understand that distinction. (shrink)

Evolution is littered with paraphyletic convergences: many roads lead to functional Romes. We propose here another example - an equivalence class structure factoring the broad realm of possible realizations of the Baars Global Workspace consciousness model. The construction suggests many different physiological systems can support rapidly shifting, sometimes highly tunable, temporary assemblages of interacting unconscious cognitive modules. The discovery implies various animal taxa exhibiting behaviors we broadly recognize as conscious are, in fact, simply expressing different forms of the same underlying (...) phenomenon. Mathematically, we find much slower, and even multiple simultaneous, versions of the basic structure can operate over very long timescales, a kind of paraconsciousness often ascribed to group phenomena. The variety of possibilities, a veritable rainbow, suggests minds today may be only a small surviving fraction of ancient evolutionary radiations - bush phylogenies of consciousness and paraconsciousness. Under this scenario, the resulting diversity was subsequently pruned by selection and chance extinction. Though few traces of the radiation may be found in the direct fossil record, exaptations and vestiges are scattered across the living mind. Humans, for instance, display an uncommonly profound synergism between individual consciousness and their embedding cultural heritages, enabling efficient Lamarkian adaptation. (shrink)

After rejecting Carruthers' conflation of levels of consciousness as implausible and conceptually muddled, and Carruthers' claim that nonhumans are automata as undermined by evolutionary and ethological considerations, we develop a general criticism of contemporary philosophical approaches which, though recognizing nonhuman consciousness, still see animals as mere receptacles of experiences. This is, we argue, due to the fact that, while in the case of humans we grant a self - something that has not only a descriptive but also a prescriptive side, (...) requiring at least non-interference - in the case of nonhumans we focus only on the descriptive aspects. Consequently, we treat humans as equals whatever their capacities, but we order nonhumans in a hierarchy based on their cognitive level. We conclude that such double standards are not only inconsistent but also self-serving. (shrink)

If there is to be a natural theory of consciousness that would satisfy both philosophers and scientists, it must be based on naturalistic data and minimal clutter accumulated from semantic arguments. Carruthers offers a 'natural' theory of consciousness that is rather myopic. To explore the evolutionary basis of consciousness, a natural theory should include comparative psychological and neurological data that encompass nonlinguistic measures. Such an approach could provide a clearer picture of the adaptive function, mechanisms, and origins of consciousness.