Galen's stories about his successes in predicting the development of an illness belong to the best-known anecdotes drawn from his writings. Brilliant pieces of self-presentation, they set Galen apart from his peers, who tried to cover up their ignorance by levelling accusations of magic and divination against their superior colleague. These accusations are usually interpreted as very real threats, as Roman law punished illicit magic and divination. Pointing out that Galen sometimes likes to present himself as amantisand a prophet, others (...) have suggested that the accusations against Galen and his own self-presentation indicate that the border line between medicine and religion was still fluid. Both approaches correctly draw attention to the social reality that the accusations betray: they suggest that Galen belongs to a group of healers of dubious standing that populated the empire and thus show that medicine did not have a monopoly on healing. Yet such a socio-historical approach may not be sufficient. For one thing, both explanations have their limitations. Regarding the former, it can be said that Augustus' prohibition of divination aimed at controlling prediction about the emperor and one can doubt that a widespread clampdown of all forms of divination ever was intended. A possible objection to the second view is that throughout hisoeuvreGalen emphasizes his medicine as a rational undertaking, even as a science (epistêmê). If one takes his self-presentation as amantisto be more than metaphorical and to indicate the not yet fully crystallized identity of medicine as a separate scientific discipline, then Galen's usual way of understanding his own craft as a ‘science’ is in need of explanation. Besides such possible objections, a different set of questions still needs to be asked: why precisely were accusations of practising magic and divination levelled against Galen and why do they recur so frequently in his writings? Why divination and not, say, poisoning? (shrink)

Using astrology as a case study, this paper attempts to establish a criterion for demarcating science from pseudoscience. Numerous reasons for considering astrology to be a pseudoscience are evaluated and rejected; verifiability and falsifiability are briefly discussed. A theory is said to be pseudoscientific if and only if (1) it has been less progressive than alternative theories over a long period of time, and faces many unsolved problems, but (2) the community of practitioners makes little attempt to develop the theory (...) towards solutions of the problems, shows no concern for attempts to evaluate the theory in relation to others, and is selective in considering confirmations and disconfirmations. This criterion has the interesting consequence that a theory can be scientific at one time but pseudoscientific at another. (shrink)

Humans massively depend on communication with others, but this leaves them open to the risk of being accidentally or intentionally misinformed. To ensure that, despite this risk, communication remains advantageous, humans have, we claim, a suite of cognitive mechanisms for epistemic vigilance. Here we outline this claim and consider some of the ways in which epistemic vigilance works in mental and social life by surveying issues, research and theories in different domains of philosophy, linguistics, cognitive psychology and the social sciences.

Reviews evidence which suggests that there may be little or no direct introspective access to higher order cognitive processes. Ss are sometimes unaware of the existence of a stimulus that importantly influenced a response, unaware of the existence of the response, and unaware that the stimulus has affected the response. It is proposed that when people attempt to report on their cognitive processes, that is, on the processes mediating the effects of a stimulus on a response, they do not do (...) so on the basis of any true introspection. Instead, their reports are based on a priori, implicit causal theories, or judgments about the extent to which a particular stimulus is a plausible cause of a given response. This suggests that though people may not be able to observe directly their cognitive processes, they will sometimes be able to report accurately about them. Accurate reports will occur when influential stimuli are salient and are plausible causes of the responses they produce, and will not occur when stimuli are not salient or are not plausible causes. (shrink)

Shamans, including medicine men, mediums, and the prophets of religious movements, recur across human societies. Shamanism also existed among nearly all documented hunter-gatherers, likely characterized the religious lives of many ancestral humans, and is often proposed by anthropologists to be the “first profession,” representing the first institutionalized division of labor beyond age and sex. In this article, I propose a cultural evolutionary theory to explain why shamanism consistently develops and, in particular, (1) why shamanic traditions exhibit recurrent features around the (...) world; (2) why shamanism professionalizes early, often in the absence of other specialization; and (3) how shifting social conditions affect the form or existence of shamanism. According to this theory, shamanism is a set of traditions developed through cultural evolution that adapts to people's intuitions to convince observers that a practitioner can influence otherwise unpredictable, significant events. The shaman does this by ostensibly transforming during initiation and trance, violating folk intuitions of humanness to assure group members that he or she can interact with the invisible forces that control uncertain outcomes. Entry requirements for becoming a shaman persist because the practitioner's credibility depends on his or her “transforming.” This contrasts with dealing with problems that have identifiable solutions (such as building a canoe), in which credibility hinges on showing results and outsiders can invade the jurisdiction by producing the outcome. Shamanism is an ancient human institution that recurs because of the capacity of cultural evolution to produce practices adapted to innate psychological tendencies. (shrink)

Cognitive scientists have increasingly turned to cultural transmission to explain the widespread nature of religion. One key hypothesis focuses on memory, proposing that that minimally counterintuitive (MCI) content facilitates the transmission of supernatural beliefs. We propose two caveats to this hypothesis. (1) Memory effects decrease as MCI concepts become commonly used, and (2) people do not believe counterintuitive content readily; therefore additional mechanisms are required to get from memory to belief. In experiments 1–3 (n = 283), we examined the relationship (...) between MCI, belief, and memory. We found that increased tendencies to anthropomorphize predicted poorer memory for anthropomorphic-MCI content. MCI content was found less believable than intuitive content, suggesting different mechanisms are required to explain belief. In experiment 4 (n = 70), we examined the non-content-based cultural learning mechanism of credibility-enhancing displays (CREDs) and found that it increased participants’ belief in MCI content, suggesting this type of learning can better explain the transmission of belief. (shrink)

Galen's stories about his successes in predicting the development of an illness belong to the best-known anecdotes drawn from his writings. Brilliant pieces of self-presentation, they set Galen apart from his peers, who tried to cover up their ignorance by levelling accusations of magic and divination against their superior colleague. These accusations are usually interpreted as very real threats, as Roman law punished illicit magic and divination. Pointing out that Galen sometimes likes to present himself as a mantis and a (...) prophet, others have suggested that the accusations against Galen and his own self-presentation indicate that the border line between medicine and religion was still fluid. Both approaches correctly draw attention to the social reality that the accusations betray: they suggest that Galen belongs to a group of healers of dubious standing that populated the empire and thus show that medicine did not have a monopoly on healing. Yet such a socio-historical approach may not be sufficient. For one thing, both explanations have their limitations. Regarding the former, it can be said that Augustus' prohibition of divination aimed at controlling prediction about the emperor and one can doubt that a widespread clampdown of all forms of divination ever was intended. A possible objection to the second view is that throughout his oeuvre Galen emphasizes his medicine as a rational undertaking, even as a science . If one takes his self-presentation as a mantis to be more than metaphorical and to indicate the not yet fully crystallized identity of medicine as a separate scientific discipline, then Galen's usual way of understanding his own craft as a ‘science’ is in need of explanation. Besides such possible objections, a different set of questions still needs to be asked: why precisely were accusations of practising magic and divination levelled against Galen and why do they recur so frequently in his writings? Why divination and not, say, poisoning? (shrink)

In a recent article, Barrett argued that a collection of five representational content features can explain both why people believe in God and why people do not believe in Santa Claus or Mickey Mouse. In this model ‐ and within the cognitive science of religion as a whole ‐ it is argued that representational content biases are central to belief. In the present paper, we challenge the notion that representational content biases can explain the epidemiology of belief. Instead, we propose (...) that representational content biases might explain why some concepts become widespread, but that context biases in cultural transmission are necessary to explain why people come to believe in some counterintuitive agents rather than others. Many supernatural agents, including those worshipped by other cultural groups, meet Barrett’s criteria. Nevertheless, people do not come to believe in the gods of their neighbors. This raises a new challenge for the cognitive science of religion: the Zeus Problem. Zeus contains all of the features of successful gods, and was once a target for widespread belief, worship, and commitment. But Zeus is no longer a target for widespread belief and commitment, despite having the requisite content to fulfill Barrett’s criteria. We analyze Santa Claus, God, and Zeus with both content and context biases, finding that context ‐ not content ‐ explains belief. We argue that a successful cognitive science of religious belief needs to move beyond simplistic notions of cultural evolution that only include representational content biases. (shrink)

Divination has been practiced as a way of knowing and communicating for millennia. Diviners are experts who embrace the notion of moving from a boundless to a bounded realm of existence in their practice. They excel in insight, imagination, fluency in language, and knowledge of cultural traditions and human psychology. During a divination, they construct usable knowledge from oracular messages of various sorts. To do so, they link diverse domains of representational information and symbolism with emotional or presentational experience. Their (...) divinatory acts involve complementary modes of cognition associated with these rather different symbolic forms. In representational symbolism, intentional reference, within a relatively controlled inductive reality, is paramount, while in presentational symbolism, implicit experiential immersion, within a free-flowing context, is grasped intuitively. Wherever a theory of divination has been elicited from diviners, there is a clear recognition of the overlapping of inductive, intuitive, and interpretive techniques and ways of knowing. In order to arrive at a theory of practice for divination, as a form of practical consciousness or knowledge within different modes of cognition, one must take what diviners say and do seriously. Recent scientific studies reveal that consciousness is connected both to electrical information in the brain and nervous system and to electronic semi-conduction in body tissues. Brain consciousness is embedded in body consciousness and coupled to it. This validates the experience of mind-body consciousness diviners have used for millennia in their performances. (shrink)

Human cooperation is highly unusual. We live in large groups composed mostly of non-relatives. Evolutionists have proposed a number of explanations for this pattern, including cultural group selection and extensions of more general processes such as reciprocity, kin selection, and multi-level selection acting on genes. Evolutionary processes are consilient; they affect several different empirical domains, such as patterns of behavior and the proximal drivers of that behavior. In this target article, we sketch the evidence from five domains that bear on (...) the explanatory adequacy of cultural group selection and competing hypotheses to explain human cooperation. Does cultural transmission constitute an inheritance system that can evolve in a Darwinian fashion? Are the norms that underpin institutions among the cultural traits so transmitted? Do we observe sufficient variation at the level of groups of considerable size for group selection to be a plausible process? Do human groups compete, and do success and failure in competition depend upon cultural variation? Do we observe adaptations for cooperation in humans that most plausibly arose by cultural group selection? If the answer to one of these questions is “no,” then we must look to other hypotheses. We present evidence, including quantitative evidence, that the answer to all of the questions is “yes” and argue that we must take the cultural group selection hypothesis seriously. If culturally transmitted systems of rules (institutions) that limit individual deviance organize cooperation in human societies, then it is not clear that any extant alternative to cultural group selection can be a complete explanation. (shrink)

We advance a theory of inductive reasoning based on similarity, and test it on arguments involving mammal categories. To measure similarity, we quantified the overlap of neural activation in left Brodmann area 19 and the left ventral temporal cortex in response to pictures of different categories; the choice of of these regions is motivated by previous literature. The theory was tested against probability judgments for 40 arguments generated from 9 mammal categories and a common predicate. The results are interpreted in (...) the context of Hume’s thesis relating similarity to inductive inference. (shrink)

By the mid-19th century, an increasing number of Japan's political leaders and scholars realized that Japan had to adapt and incorporate some elements of Western-style industrialization into their own political and economic order as the necessary means to remain independent of Western imperialism. The Opium War in China, and later the Euro-American bombardments of the domain capitals in Choshu and Satsuma demonstrated that trying to defend the realm with only an increased emphasis on coastal defense would ultimately fail to keep (...) out the barbarians from the West. Sakuma Shozan, a samurai scholar from Matsushiro, proposed a dichotomous philosophy of 'Eastern ethics, Western science' as the means to strengthen Japan both internally and externally, and allow Japan to maintain its independence. In this paper, I argue that Sakuma's dichotomous approach can be interpreted within a Hegelian dialectical paradigm. After the traditional order of Japan (Eastern ethics as Idea/Thesis) came into contact with the industrializing order of the West (Western science as Nature/Anti-Thesis), Sakuma believed a new order would be created in Japan (Synthesis) that combined an increased knowledge on the Eastern ethics of Neo-Confucianism with the 'new' scientific knowledge of the West. (shrink)

The present study examined children's understanding of illness in a peri-urban community in South Africa where AIDS is prevalent. Results suggest that children were surprisingly knowledgeable about AIDS at an early age, and may have even erroneously analogized from AIDS to the flu. Furthermore, all age groups attributed different causes for AIDS and flu. However, although factual knowledge about AIDS was identified among all age groups, there was no evidence of understanding biological causal mechanisms. The data have implications both for (...) developmental research on biological reasoning in diverse cultural contexts and for the design of health education programs. (shrink)