Thomas Reid

My paper offers a new interpretation of Reid’s account of social operations of the mind. I argue that it is important to acknowledge the counterpart structure of social operations. By this I mean that for Reid every social operation is paired with a counterpart operation. On the view that I ascribe to Reid, at least two intelligent beings take part in a social operation and the social operation does not come into existence until both the social operation and its counterpart (...) operation have been exercised and the relevant mental thoughts made known to the other being by words or signs. (shrink)

I examine the views of Thomas Reid with respect to a certain version of the problem of induction: Why are inductions using natural kinds successful, and what justifies them? I argue that while both Reid holds a kind of conventionalist view about natural kinds, this conventionalism has a realistic component which allows him to answer both questions.

Philosophical orthodoxy holds that Thomas Reid is an externalist concerning epistemic justification, characterizing Reid as holding the key to an externalist response to internalism. These externalist accounts of Reid, however, have neglected his work on prejudice, a heretofore unexamined aspect of his epistemology. Reid’s work on prejudice reveals that he is far from an externalist. Despite the views Reid may have inspired, he exemplifies internalism in opting for an accessibility account of justification. For Reid, there are two normative statuses that (...) a belief might satisfy, being blameless and having a just ground. Through reflection, a rational agent is capable of satisfying both of these statuses, making Reid an accessibility internalist about epistemic justification. (shrink)

This paper answers two interpretive questions surrounding belief in God in Thomas Reid’s philosophy, the status question and the detachability question. The former has to do with the type of justification Reid assigns to belief in God – immediate or mediate. The later question is whether anything philosophically significant depends on his belief in God. I argue that, for Reid, belief in God is immediately justified and integral to some parts of his system. Reid’s response to skepticism about God is (...) more complicated and more interesting than many of the contemporary philosophers who, citing Reid as inspiration, also hold that belief in God enjoys immediate justification. In Reid’s hands the approach to belief in God does not compete with inferential justification, does not rely on a special faculty, and foregrounds the developmental character of his epistemology. (shrink)

The starting point of this paper is Thomas Reid's anti-skepticism: our knowledge of the external world is justified. The justificatory process, in his view, starts with and relies upon one of the main faculties of the human mind: perception. Reid's theory of perception has been thoroughly studied, but there are some missing links in the explanatory chain offered by the secondary literature. In particular, I will argue that we do not have a complete picture of the mechanism of perception of (...) bodies. The present paper, relying, in part, on a particular theory in psychology – the feature integration theory of attention – will make a contribution in this regard. (shrink)

I discuss the role of translatability in philosophical justification. I begin by discussing and defending Thomas Reid’s account of the role that facts about comparative linguistics can play in philosophical justification. Reid believes that common sense offers a reliable but defeasible form of justification. We cannot know by introspection, however, which of our judgments belong to common sense. Judgments of common sense are universal, and so he argues that the strongest evidence that a judgment is a part of common sense (...) is that it is to be found in all languages. For Reid, then, evidence that a certain distinction is to be found in all languages is evidence that the distinction is part of common sense rather than being a common local prejudice. From such a perspective, empirical work in comparative linguistics can play a defeasible justificatory role in philosophical arguments. I contrast Reid’s position with the more radical position of defenders of the Natural Semantic Metalanguage approach, such as Anna Wierzbicka, who argues that only judgments that are translatable into all natural languages are justifiable. I show how such a position is rooted in an implausible view, although one common among cognitive scientists and linguistics, about the nature of concepts, which does not allow for novel concepts. (shrink)

Thomas Reid’s philosophy is a philosophy of mind—a Pneumatology in the idiom of 18th century Scotland. His overarching philosophical project is to construct an account of the nature and operations of the human mind, focusing on the two-way correspondence, in perception and action, between the thinking principle within and the material world without. Like his contemporaries, Reid’s treatment of these topics aimed to incorporate the lessons of the scientific revolution. What sets Reid’s philosophy of mind apart is his commitment to (...) a set of intuitive contingent truths he called the principles of common sense. This difference, as this chapter will show, enables Reid to construct an account of mind that resists the temptation to which so many philosophers in his day and ours succumb, i.e., the temptation, in his words, to materialize minds or spiritualize bodies. (shrink)

Alexander Campbell once declared “a solemn league and covenant” between philosophy and common sense. Campbell’s pronouncement is representative of a broader trend in the Restorationist movement to look favorably on the common sense response to skepticism—a response originating in the work of Scottish philosopher and former minister Thomas Reid. I recount the tumultuous history between philosophy and common sense followed by the efforts of Campbell and Reid to reunite them. Turning to the present, I argue that an epistemic principle known (...) as phenomenal conservatism best embodies the core insights contained within Reid and Campbell's common sense response to skepticism. I finish by arguing for phenomenal conservatism. (shrink)

Thomas Reid believed that the human mind is well equipped, from infancy, to acquire knowledge of the external world, with all its objects, persons and events. There are three main faculties that are involved in the acquisition of knowledge: (original) perception, memory, and imagination. It is thought that we cannot understand how exactly perception works, unless we have a good grasp on Reid’s notion of perceptual conception (i.e., of the conception employed in perception). The present paper argues that the same (...) is true of memory, and it offers an answer to the question: what type of conception does it employ? (shrink)

The goal of this paper is show how an initially appealing objection to David Hume's account of judgment can only be put forward by philosophers who accept an account of judgment that has its own sizable share of problems. To demonstrate this, I situate the views of John Locke, David Hume, and Thomas Reid with respect to each other, so as to illustrate how the appealing objection is linked to unappealing features of Locke's account of judgment.

Thomas Reid's philosophy of mind, epistemology, and philosophy of language all rely on his account of signs and signification. On Reid's view, some entities play a role of indicating other entities to our minds. In some cases, our sensitivity to this indication is learned through experience, whereas in others, the sensitivity is built in to our natural constitutions. Unlike representation, which was presumed to depend on resemblances and necessary connections, signification is the sort of relationship that can occur without any (...) intrinsic ties between the sign and the thing signified. Of particular interest is the priority Reid gives to natural signs. Reid deploys his robust account of natural signs in a way that allows him to sidestep some skeptical worries common in the early modern period, as well as in grounding “artificial” human languages like English or Cantonese on a more basic human capacity for communication, that is, itself, the result of our sensitivity to natural signs of other people's minds. (shrink)

We argue that there is no tension between Reid's description of science and his claim that science is based on the principles of common sense. For Reid, science is rooted in common sense since it is based on the idea that fixed laws govern nature. This, however, does not contradict his view that the scientific notions of causation and explanation are fundamentally different from their common sense counterparts. After discussing these points, we dispute with Cobb's and Benbaji's interpretations of Reid's (...) views on causation and explanation. Finally, we present Reid's views from the perspective of the contemporary debate on scientific explanation. (shrink)

I argue that some of the most prominent interpretations of Reid's response to skepticism marginalize a crucial aspect of his thought: namely, that our common sense beliefs meet whatever normative standards of rationality the skeptic might fairly demand of them. This should be seen as supplementary to reliabilist or proper functionalist interpretations of Reid, which often ignore this half of the story. I also show how Reid defends the rationality of believing first principles by appealing to their naturalness and irresistibility. (...) The resulting interpretation supplies Reid with a more satisfying and formidable response to the skeptic than interpretations currently offer. (shrink)

A brief introduction to Thomas Reid's philosophy on language.

This paper traces the ancestry of a familiar historiographical narrative, according to which early modern philosophy was marked by the development of empiricism, rationalism, and their synthesis by Immanuel Kant. It is often claimed that this narrative became standard in the nineteenth century, due to the influence of Thomas Reid, Kant and his disciples, or German Hegelians and British Idealists. The paper argues that the narrative became standard only at the turn of the twentieth century. This was not due to (...) the influence of Reid, German Hegelians, or British Idealists as they did not endorse the narrative, although Thomas Hill Green may have facilitated its uptake. The narrative is based on Kant’s historiographical sketches, as corrected and integrated by Karl Leonhard Reinhold. It was first fleshed out into full-fledged histories by two Kantians, Wilhelm Gottlieb Tennemann and Johann Gottlieb Buhle. Numerous historians, several of whom were not Kantians, spread it in the English-speaking world. They include Kuno Fischer, Friedrich Ueberweg, Richard Falckenberg, and Wilhelm Windelband. However, the wide availability of their works did not suffice to make the narrative standard because, until the 1890s, the Hegelian account was at least as popular as theirs. Among the factors that allowed the narrative to become standard are its aptness to be adopted by philosophers of the most diverse persuasions, its simplicity and suitability for teaching. (shrink)

The present investigation concerns Reid’s explanation of how objects (be they real or nonexistent) are conceived. This paper shows that there is a deep-rooted tension in Reid’s understanding of conception: although the type of conception employed in perception is closely related to the one employed in imagination, three fundamental features distinguish perceptual conception (as the former will be referred to throughout this paper) from imaginative conception (as the latter will be called henceforth). These features would have been ascribed by Reid (...) himself to conception as involved in perception, but not to conception as involved in imagination. He should have recognized them as marking the former as a different kind from the latter, and he should not have hastily lumped perceptual and imaginative conceptions together. (shrink)

In An Inquiry into the Human Mind and in Essays on Intellectual Powers, Thomas Reid discusses what kinds of things perceivers are related to in perception. Are these things qualities of bodies, the bodies themselves, or both? This question places him in a long tradition of philosophers concerned with understanding how human perception works in connecting us with the external world. It is still an open question in the philosophy of perception whether the human perceptual system is providing us with (...) representations as of bodies, or only as of their properties. My project in this article is to explain how, on Reid's view, we can have perceptual representations as of bodies. This, in turn, enables him to argue that we have a robust understanding of the world around us, an understanding that would be missing if our perceptual system only supplied us with representations as of free-floating properties of bodies. (shrink)

Reid argues that Hume’s claim that justice is an artificial virtue is inconsistent with the fact that gratitude is a natural sentiment. This chapter shows that Reid’s argument succeeds only given a philosophy of mind and action that Hume rejects. Among other things, Reid assumes that one can conceive of one of a pair of contradictories only if one can conceive of the other—a claim that Hume denies. So, in the case of justice, the disagreement between Hume and Reid is, (...) at bottom, a disagreement over their respective conceptions of how the human mind works at its most fundamental level. (shrink)

While Hume had a favorable opinion of the new commercial society, Reid envisioned a utopian system that would eliminate private property and substitute the profit incentive with a system of state-conferred honors. Reid’s predilection for a centralized command economy cannot be explained by his alleged discovery of market failures, and has to be considered in the context of his moral psychology. Hume tried to explain how the desire for gain that motivates the merchant leads to industry and frugality. These, in (...) their turn, benefit all society. Reid still saw the desire for money as a degenerate form of the desire for power. The contrast between Hume and Reid, however, has not to be taken too far. On some particular matters of economic policy, such as paper credit, Hume and Reid eventually came to similar views. (shrink)

This paper elucidates the pragmatist elements of Thomas Reid's approach to the justification of first principles by reference to Charles S. Peirce. Peirce argues that first principles are justified by their surviving a process of ‘self-criticism’, in which we come to appreciate that we cannot bring ourselves to doubt these principles, in addition to the foundational role they play in inquiries. The evidence Reid allows first principles bears resemblance to surviving the process of self-criticism. I then argue that this evidence (...) allows Reid and Peirce a way out of the dilemma between dogmatism and skepticism regarding the justification of such principles, insofar as they are epistemically, and not solely practically, justified. (shrink)

Un'introduzione ad alcune delle idee principali della filosofia di Thomas Reid, scritta per la traduzione italiana del saggio sulla memoria, dai "Saggi sui poteri intellettuali dell'uomo".

Thomas Reid is notorious for rejecting the orthodox theory of conception (OTC), according to which conceiving of an object involves a mental relationship to an idea of that object. In this paper, I examine the question of what this rejection amounts to, when we limit our attention to bare conception (rather than the more widely discussed case of perception). I present some of the purported advantages of OTC, and assess whether they provide a genuine basis for preferring OTC to a (...) Reidian alternative. I argue that Reid’s approach is no worse off than OTC at explaining intentionality of our conceptions, and suggest that OTC diverges less from Reid’s view than it would at first seem. (shrink)

Review Essay: C. Stephen Evans, Natural Signs and Knowledge of God: A New Look at Theistic Arguments, Oxford UP (2012).

According to Thomas Reid, an agent cannot be free unless she has the power to do otherwise. This claim is usually interpreted as a version of the Principle of Alternate Possibilities. Against this interpretation, I argue that Reid is committed to the seemingly paradoxical position that an agent may have the power to do otherwise despite the fact that it is impossible that she do otherwise. Reid's claim about the power to do otherwise does not, therefore, entail the Principle of (...) Alternate Possibilities. When it is an agent's character that deprives her of alternate possibilities, she is not thereby deprived of either power or freedom, and this is true even if the agent was not free or active in the formation of her character. (shrink)

This paper explores the main contours of recent work in English-speaking philosophy of religion on the justification of religious belief. It sets out the main characteristics of the religious epistemologies of such writers as Alston, Plantinga, and Swinburne. It poses and seeks to answer the question of how far any or all of these epistemologies are indebted or similar to the epistemology of the Scottish Enlightenment thinker Thomas Reid. It concludes that while there are some links to Reid in recent (...) writing, contemporary approaches depart from Reid’s views on the specific topic of the justification of religious belief. (shrink)

Philosophers have routinely taken a pessimistic view of the account of cognition offered by David Hume in his Treatise of Human Nature, claiming that Hume's limited explanatory resources cannot capture the rich complexity of our thought, judgment, and reasoning. I provide a qualified defense of Hume's attempt to analyze a cognitive activity in terms of objectual conception, ie conceiving or imagining an object. I defend Hume from objections offered by his contemporary Thomas Reid (and echoed by various recent Hume scholars), (...) presenting an interpretation of the account that resolves these worries. (shrink)

Thomas Reid distinguished between natural and artificial language and argued that natural language has a very specific sort of priority over artificial language. This paper critically interprets Reid's discussion, extracts a Reidian explanatory argument for the priority of natural language, and places Reid's thought in the broad tradition of Cartesian linguistics.

Defining actions in contradistinction to mere happenings runs into the problem of specifying the role of the agent and separating what the agent does from what they exploit or suffer. Traditionally these problems have been approached by starting with a simple act, such as an incidental movement, and considering causality, or by seeking to elucidate the connection between the act and the agent's intentions or reasons. It is suggested here that a promising approach is to shift attention from 'simple' movements (...) and start instead by exploring the general character of acquired skills. Balancing the body is one such skill and serves here as an exemplar. Some remarks made by Reid on balance are used in a Peircean framework for perception to suggest that, at least for humans, an action is always the performance of an acquired skill. Also, while action is constitutive of perception, bodily perception is the basis of action, providing in a feeling of ownership direct knowledge of an asymmetric opposition between the agent and the world. (shrink)

Thomas Reid thinks of natural philosophy as a purely nomothetic enterprise but he maintains that it is proper for natural philosophers to employ causal terminology in formulating their explanatory claims. In this paper, I analyze this puzzle in light of Reid's distinction between efficient and physical causation – a distinction he grounds in his strict understanding of active powers. I consider several possible reasons that Reid may have for maintaining that natural philosophers ought to employ causal terminology and suggest that (...) the underlying rationale for his views is his understanding of the aims of explanation and their connection to the interests of human agents. The ultimate aim of knowing the causes of phenomena is to mollify the natural intellectual curiosity of human inquirers and provide guidance that insures successful action. The discovery of laws governing phenomena fulfills this aim and, as such, it is appropriate for natural philosophers to employ causal terminology. (shrink)

In a recent article on Reid’s theory of single and double vision, James Van Cleve considers an argument against direct realism presented by Hume. Hume argues for the mind-dependent nature of the objects of our perception from the phenomenon of double vision. Reid does not address this particular argument, but Van Cleve considers possible answers Reid might have given to Hume. He finds fault with all these answers. Against Van Cleve, I argue that both appearances in double vision could be (...) considered visible figures of the object, and show how this solution might preserve Reid’s direct realism. However, this solution is not compatible with the single appearance of an object predicted by Reid’s theory of single and double vision. This consequence will appear evident once we consider the critique of Reid’s theory of single and double vision formulated by William Charles Wells (1757-1817). Wells argues that Reid’s theory is either incomplete or incompatible with other claims made by Reid. It is incomplete since it fails to specify the unique direction in which we the object in single vision; if it not incomplete and is compatible with the law of monocular direction given by Reid, then it is incompatible with Reid’s claim that we do not perceive immediately distance by sight. (shrink)

The sense of balance remains a Cinderella among our senses. Although the vestibular apparatus and the apprehension of motion, equilibrium and orientation which it serves has now been studied extensively and descriptions abound in textbooks on perceptual psychology, its key role in our agency remains neglected in philosophical accounts of perception. Popularly received wisdom on the senses also largely ignores balance and it has recently even been called 'the lost sense'. -/- Recognition for the discovery of this sense should probably (...) be accorded to Thomas Reid and his contemporary William Charles Wells. Both made crucial observations before the close of the eighteenth century. Since there is now a tendency to emphasize the role of the agent, brain plasticity, and the development of motor skills in all perceptual tasks, some of Reid's comments in particular strike us as remarkably modern. Reid also differs from many authorities in crediting the sense with specific sensations, as would be expected given the role of sensations in his epistemological scheme. -/- In this paper some of the fascinating facts about the sense of balance are reviewed so that Reid's remarks can be evaluated in a modern context. Similarities and differences in the approaches of Wells and Reid are considered and the value that Reid's insights have even now in understanding perceptual processes is explored. It is suggested that Reid should indeed be counted among the hitherto unacknowledged discoverers of this fundamental sense. (shrink)

I discuss Hume's views about whether simplicity and generality are positive features of explanations. In criticizing Hobbes and others who base their systems of morality on self interest, Hume diagnoses their errors as resulting from a "love of simplicity". These worries about whether simplicity is a positive feature of explanations emerge in Hume's thinking over time. But Hume does not completely reject the idea that it's good to seek simple explanations. What Hume thinks we need is good judgment about when (...) we are going too far in our search for simple explanations. These worries about simplicity are not unique to Hume. We can see versions of them in the work of Hutcheson, Smith, and Reid. (shrink)

In order to illustrate the difference between sensation and perception, Reid imagines a blind man that by ‘some strange distemper’ has lost all his notions of external objects, but has retained the power of sensation and reasoning. Reid argues that since sensations do not resemble external objects, the blind man could not possibly infer from them any notion of primary qualities. Condillac proposed a similar thought experiment in the Treatise on Sensations. I argue that Condillac can reach a conclusion opposite (...) to that of Reid only by assuming that some particular collections of sensations do indeed resemble the qualities of external objects. Reid had considered a similar case in a manuscript, but he again notices that such complex collections sensations do not resemble the qualities of external objects. (shrink)

Thomas Reid is often misread as defending common sense, if at all, only by relying on illicit premises about God or our natural faculties. On these theological or reliabilist misreadings, Reid makes common sense assertions where he cannot give arguments. This paper attempts to untangle Reid's defense of common sense by distinguishing four arguments: (a) the argument from madness, (b) the argument from natural faculties, (c) the argument from impotence, and (d) the argument from practical commitment. Of these, (a) and (...) (c) do rely on problematic premises that are no more secure than claims of common sense itself. Yet (b) and (d) do not. This conclusion can be established directly by considering the arguments informally, but one might still worry that there is an implicit premise in them. In order to address this concern, I reconstruct the arguments in the framework of subjective Bayesianism. The worry becomes this: Do the arguments rely on specific values for the prior probability of some premises? Reid's appeals to our prior cognitive and practical commitments do not. Rather than relying on specific probability assignments, they draw on things that are part of the Bayesian framework itself, such as the nature of observation and the connection between belief and action. Contra the theological or reliabilist readings, the defense of common sense does not require indefensible premises. (shrink)

This paper reconstructs Reid 's responses to regress arguments against the possibility of free will, highlighting the role played by long-term decisions in the explanation of paradigmatic free actions on Reid 's account. In addition to reconstructing Reid 's response to the two versions of the regress argument that he explicitly discusses, I also construct a Reidian response to Galen Strawson's contemporary version of the regress argument. The depth of Reid 's position is most apparent in the resources it provides (...) for responding to this sophisticated articulation of a traditional argument against freedom of the will. (shrink)

Peter Baumann offers the tantalizing suggestion that Thomas Reid is almost, but not quite, a pragmatist. He motivates this claim by posing a dilemma for common sense philosophy: Will it be dogmatism or scepticism? Baumann claims that Reid points to but does not embrace a pragmatist third way between these unsavory options. If we understand `pragmatism' differently than Baumann does, however, we need not be so equivocal in attributing it to Reid. Reid makes what we could call an argument from (...) practical commitment, and this is plausibly an instance of what William James calls the pragmatic method. (shrink)

The role of conventions in the formulation of Thomas Reid’s theory of the geometry of vision, which he calls the “geometry of visibles”, is the subject of this investigation. In particular, we will examine the work of N. Daniels and R. Angell who have alleged that, respectively, Reid’s “geometry of visibles” and the geometry of the visual field are non-Euclidean. As will be demonstrated, however, the construction of any geometry of vision is subject to a choice of conventions regarding the (...) construction and assignment of its various properties, especially metric properties, and this fact undermines the claim for a unique non-Euclidean status for the geometry of vision. Finally, a suggestion is offered for trying to reconcile Reid’s direct realist theory of perception with his geometry of visibles. (shrink)

We provide an overview of Searle's contributions to speech act theory and the ontology of social reality, focusing on his theory of constitutive rules. In early versions of this theory, Searle proposed that all such rules have the form 'X counts as Y in context C' formula – as for example when Barack Obama (X) counts as President of the United States (Y) in the context of US political affairs. Crucially, the X and the Y terms are here identical. A (...) problem arises for this theory for cases involving 'free-standing Y terms', as for example in the case of money in a computerized bank account. Here there is no physical X to which a status function might be attached. We conclude by arguing that Searle's response to this problem creates difficulties for his naturalistic framework. (shrink)

Provides a survey of the development of speech act theory from Aristotle through Reid and Peirce to Edmund Husserl, Anton Marty, Johannes Daubert, Adolf Reinach, and finally to Austin and Searle. A special role is played by Husserl's theory of objectifying acts (meaning, roughly, acts of naming or stating) and of the efforts by his followers to extend this theory to cover phenomena such as questioning and commanding. These efforts culminated in the work of Adolf Reinach, who developed the first (...) systematic theory of speech acts in connection with his monograph of 1913 on “The A Priori Foundations of the Civil Law”. (shrink)

Reid said little in his published writings about his contemporary Joseph Priestley, but his unpublished work is largely devoted to the latter. Much of Priestley's philosophical thought- his materialism, his determinism, his Lockean scientific realism- was as antithetical to Reid's as was Hume's philosophy in a very different way. Neither Reid nor Priestley formulated a full response to the other. Priestley's response to Reid came very early in his career, and is marked by haste and immaturity. In his last decade (...) Reid worried much about Priestley's materialism, but that concern never reached publication. I document Reid's unpublished response to Priestley, and also view Reid's response from Priestley's perspective, as deduced from his published works. Both thinkers attempted to base their arguments on Newtonian method. Reid's position is the more puzzling of the two, since he nowhere makes clear how Newtonian method favours mind-body dualism over materialism, which is the central debate between them. (shrink)

The paper reconstructs the reception of Descartes's work by the Scottish Enlighteners, from Colin MacLaurin to Dugald Stewart. The Scots' image of Descartes was a byproduct of a scientific controversy; philosophical arguments were brought into the picture more as asides than as a primary focus of interest. As soon as the Cartesian physics withered away as a real alternative to Newtonian physics, only the philosophical arguments were left, with no memory of the context out of which they originated, and the (...) focus of the discussion shifts from physics to the philosophy of mind and the theory of knowledge. (shrink)

Hume's notion of conception is closer to Reid's than Reid realizes and may lie behind Hume's charge in the letter to Hugh Blair (1762) that Reid's philosophy "leads us back to innate ideas".

Provides a survey of the development of speech act theory from Aristotle through Reid and Peirce to Edmund Husserl, Anton Marty, Johannes Daubert, Adolf Reinach, and finally to Austin and Searle. A special role is played by Husserl's theory of objectifying acts (meaning, roughly, acts of naming or stating) and of the efforts by his followers to extend this theory to cover phenomena such as questioning and commanding. These efforts culminated in the work of Adolf Reinach, who developed the first (...) systematic theory of speech acts in connection with his monograph of 1913 on “The A Priori Foundations of the Civil Law”. (shrink)

One of the great attractions of Thomas Reid's account of knowledge is that he attempted to avoid the alternative between skepticism and dogmatism. This attempt, however, faces serious problems. It is argued here that there is a pragmatist way out of the problems, and that there are even hints to this solution in Reid's writings.

This paper is a reconstruction and analysis of Thomas Reid’s epistemology, based upon an examination of his extant manuscripts and publications. I argue that, in Reid’s view, a certain degree of “evidence” (or, as I shall say, ‘epistemic justification’) is that which distinguishes mere true belief from knowledge; and that this degree of justification may be ascribed to a person’s belief if and only if (i) the evidence upon which her belief is grounded is such that she holds it with (...) “certainty”; (ii) she has a “sound understanding”; (iii) she has a distinct conception of the object of her belief; and, finally, (iv) she has formed her belief “without prejudice”. (shrink)