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.

Reason, we are told, is what makes us human, the source of our knowledge and wisdom. If reason is so useful, why didn't it also evolve in other animals? If reason is that reliable, why do we produce so much thoroughly reasoned nonsense? In their groundbreaking account of the evolution and workings of reason, Hugo Mercier and Dan Sperber set out to solve this double enigma. Reason, they argue with a compelling mix of real-life and experimental evidence, is not geared (...) to solitary use, to arriving at better beliefs and decisions on our own. What reason does, rather, is help us justify our beliefs and actions to others, convince them through argumentation, and evaluate the justifications and arguments that others address to us. In other words, reason helps humans better exploit their uniquely rich social environment. This interactionist interpretation explains why reason may have evolved and how it fits with other cognitive mechanisms. It makes sense of strengths and weaknesses that have long puzzled philosophers and psychologists--why reason is biased in favor of what we already believe, why it may lead to terrible ideas and yet is indispensable to spreading good ones.--. (shrink)

Short abstract (98 words). Reasoning is generally seen as a means to improve knowledge and make better decisions. However, much evidence shows that reasoning often leads to epistemic distortions and poor decisions. This suggests that the function of reasoning should be rethought. Our hypothesis is that the function of reasoning is argumentative. It is to devise and evaluate arguments intended to persuade. Reasoning so conceived is adaptive given humans’ exceptional dependence on communication and vulnerability to misinformation. A wide range of (...) evidence in the psychology of reasoning and decision making can be reinterpreted and better explained in the light of this hypothesis. (shrink)

Growing evidence indicates that our higher rational capacities depend on social interaction—that only through engaging with others do we acquire the ability to evaluate beliefs as true or false, or to reflect on and evaluate the reasons that support our beliefs. Up to now, however, we have had little understanding of how this works. Here we argue that a uniquely human socio-linguistic phenomenon which we call ‘joint attention to mental content’ plays a key role. JAM is the ability to focus (...) together in conversation on the content of our mental states, such as beliefs and reasons. In such conversations it can be made clear that our attitudes to beliefs or reasons may conflict—that what I think is true, you might think is false, or that what I think is a good reason for believing something, you might think is a bad reason. We argue that through JAM, children discover that mental contents can be evaluated under various attitudes, and that this discovery transforms their mind-reading and reasoning abilities. (shrink)

People develop and deploy epistemic norms – normative sensibilities in light of which they regulate both their individual and community epistemic practice. There is a similarity to folk's epistemic normative sensibilities – and it is by virtue of this that folk commonly can rely on each other, and even work jointly to produce systems of true beliefs – a kind of epistemic common good. Agents not only regulate their belief forming practices in light of these sensitivities, but they make clear (...) to others that they approve or disapprove of practices as these accord with their sensibilities – they thus regulate the belief forming practices of others in an interdependent pursuit of a good – something on the order of a community stock of true beliefs. Such general observations suggest ways in which common epistemic norms function as social norms, as these are characterized by Cristina Bicchieri's (2006) discussion of various kinds of norms. I draw on this framework – together with an important elaboration in Bicchieri (2017) – as it affords an analysis of the various related ways in which normative sensibilities function in communities of interdependent agents. The framework allows one to probe how these normative sensibilities function in the various associated choice situations. I argue that epistemic norms are fundamentally social norms, and, at the same time, they also are widely shared sensibilities about state-of-the-art ways of pursuing projects of individual veritistic value. The two foundations suggest the analogy of an arch. (shrink)

First Published in 1999. Routledge is an imprint of Taylor & Francis, an informa company.