Metaepistemology

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Metaepistemology is the branch of epistemology and metaphilosophy that studies the underlying assumptions made in debates in epistemology, including those concerning the existence and authority of epistemic facts and reasons, the nature and aim of epistemology, and the methodology of epistemology. [1]

Contents

Perspectives in methodological debates include traditional epistemology which argues for the use of intuitions and for the autonomy of epistemology from science, experimental philosophy which argues against intuitions and for the use of empirical studies in epistemology, pragmatism which argues for the reconstruction of epistemic concepts to achieve practical goals, naturalism which argues that epistemology should be empirical and scientifically-informed, and feminism which criticises androcentric bias in epistemology and argues for the use of feminist method.

Terminology

According to philosopher Dominique Kuenzle, metaepistemology is not an established term in contemporary philosophy, only having been used by a few philosophers throughout the twentieth and twenty-first century. It was coined by Roderick Firth in 1959 in an article discussing the views of Roderick Chisholm on the ethics of belief. [2] Richard Brandt used the term in 1967 in the Encyclopedia of Philosophy , defining it as a higher-order discipline, analogous to metaethics, that attempts to explain epistemic concepts and to understand the underlying logic of epistemic statements. [3] In 1978, similarly inspired by the work of Roderick Chisholm, William Alston released "Meta-Ethics and Meta-Epistemology", the first paper with the explicit aim of defining the distinction between metaepistemology and "substantive epistemology", in which he defined metaepistemology as the study of "the conceptual and methodological foundations of [epistemology]." [4] Whilst subsequent theorists using the term have agreed on the need for a distinction between metaepistemology and other areas of epistemology, there are substantial disagreements about how and where to draw the lines. [5]

Some sources define metaepistemology narrowly as the epistemology of epistemology, [6] including The Blackwell Dictionary of Western Philosophy which also states that the role of metaepistemology is in comparing different epistemologies and analyzing epistemic concepts. [7] Others emphasise the role of metaepistemology in examining epistemology's goals, methods and criteria of adequacy. [8] Metaepistemology is also sometimes characterised as the study of epistemic statements and judgements, including their semantic, ontological and pragmatic status, [6] or as the study of epistemic facts and reasons. [9] Metaepistemology has been described as a reflective or higher-order discipline by a number of sources, including the Routledge Encyclopedia of Philosophy , Internet Encyclopedia of Philosophy and The Cambridge Dictionary of Philosophy, which calls metaepistemology a branch of metaphilosophy. [10] The Cambridge Dictionary of Philosophy also emphasises that metaepistemology is concerned with the fundamental assumptions of epistemology. [11] Similarly, the Stanford Encyclopedia of Philosophy states that metaepistemology "takes a step back from particular substantive debates in epistemology in order to inquire into the assumptions and commitments made by those who engage in these debates." [1]

Relationship to epistemology

The division between metaepistemology and the other branches of epistemology—as well as their connections with one another—are debated by metaepistemologists. [12] Some theorists, such as William Alston, characterise metaepistemology as dealing with the analysis of epistemic concepts such as knowledge. [7] Others, such as Dominique Kuenzle and Christos Kyriacou, argue that the analysis of knowledge is a paradigmatic example of a standard first-order epistemological question, not a metaepistemological one. [13] Theorists also differ on whether the debate between internalism and externalism is epistemological or metaepistemological. [14]

As well as the question of where the dividing line between metaepistemology and the rest of epistemology should be placed, there are also differing views about what branches to divide epistemology into. The Blackwell Dictionary of Western Philosophy contrasts metaepistemology with "substantive epistemology" whereas the Internet Encyclopedia of Philosophy states that epistemology can be divided into three branches analogously to the three branches of ethics: metaepistemology, normative epistemology and applied epistemology. [15] Richard Fumerton views the idea of a branch of normative epistemology as problematic because he views epistemic normativity as inherently different in character to moral normativity; he instead divides epistemology into metaepistemology and applied epistemology. [16]

Views about the relationship between metaepistemology and the other branches of epistemology fall into two groups: autonomy and interdependency. According to the autonomy view, metaepistemology is an entirely independent branch of epistemology that neither depends on the other branches nor entails any particular position in the other branches. For example, according to this view, a person being an epistemic realist, anti-realist, or relativist has no implications for whether they should be a coherentist, foundationalist, or reliabilist and vice versa. According to the interdependency view, on the other hand, there are strong theoretical interdependencies between the branches and a normative epistemological view may even be fully derivable from a metaepistemological one. [17]

Epistemological methodology

Overall, traditional accounts of epistemological methodology hold that epistemological inquiry is a priori and so methods should be reflective rather than empirical, that epistemology is methodologically and conceptually autonomous from scientific methodology, and that epistemology is not just a descriptive discipline, but also a normative one as well. [18] Another part of traditional methodology is the use of intuitions to make judgements about thought experiments which has arguably been a central part of philosophical methodology dating back to Plato; a famous example of its use in epistemology is the use of epistemologists intuitive responses to cases such as Gettier cases to determine the validity or invalidity of different theories of knowledge. [19] Defenders of traditional epistemological methodology include Laurence BonJour, Ernest Sosa, Timothy Williamson and George Bealer. [20] BonJour and Bealer have both argued that methodologies that reject a priori inquiry are self-defeating because their proponents must make arguments for why the rejection of a priori inquiry is preferable to traditional epistemology and, prior to the adoption of one methodology over the other, the only way to judge which is better is with the use of a priori judgements about which set of arguments are better. [21] [22] As BonJour summarises the argument, "the repudiation of all a priori justification is apparently tantamount to the repudiation of argument or reasoning generally, thus amounting in effect to intellectual suicide." [23]

The use of intuitive judgements in traditional epistemological methodology has been criticised due to empirical results coming from the field of experimental philosophy which have aimed to cast doubt on this and other kinds of philosophical methodology which experimental philosophers view as "armchair methodology". [24] Studies in experimental philosophy have suggested that intuitive judgements are unreliable because they are unstable and because they are sensitive to philosophically irrelevant factors such as cultural background and personality. [25] They have also attempted to show that philosopher's intuitions misrepresent the folk intuitions of society at large. [24] Proponents of the use of intuition in epistemology have questioned the design of these studies and put forwards their own empirical results. However, with the increasing professionalization of experimental philosophy, such arguments have fallen out of favour. [25] Proponents have also attempted to argue that these experimental results are compatible with existing philosophical methodology. For example, one response to these results has been that folk judgements about philosophical thought experiments are subject to cognitive bias and that they are less reliable than the intuitions of professional philosophers who have a higher level of expertise in the subject area. [24] Subsequent studies have shown that some of the earlier results in experimental philosophy such as the instability of intuitive judgements and their sensitivity to philosophically irrelevant factors affect professional philosophers to a similar degree as lay people and that professional philosophers are also subject to cognitive biases. [26] Another argument that has been put forward by Max Deutsch and Herman Cappelen is that, contrary to the claims of experimental philosophers, examination of the philosophical literature reveals that thought experiments in philosophy actually don't rely on intuitive judgements but rather on judgements which are supported by philosophical arguments. [27] [28]

In response to this debate, Jonathan Weinberg has argued that one reason epistemologists have defended an intuition-driven methodology is because these results from experimental philosophy do not provide an alternative methodology to be used in its place. In order to strengthen the case against intuition-driven methodology, Weinberg proposes an alternative methodology which he calls "reconstructive neopragmatism" and compares it to intuition-driven methodology by how well they each meet up to several desirable methodological qualities including truth-conduciveness and the ability to produce normative results, the two most important qualities according to Weinberg. Weinberg argues that the biggest failures of intuition-driven methodology is that it doesn't foster successful conversations because intuitions are entirely subjective and cannot be rationally argued for or against and that it seems to imply epistemic relativism due to varying intuitions across cultures. Weinberg's reconstructive neopragmatism replaces intuitions with an “analysis-by-imagined-reconstruction” in which epistemologists continually evaluate and re-evaluate how epistemic norms and concepts should be changed to best achieve practical goals such as organising our lives. Weinberg claims that an advantage to this pragmatist methodology over intuition-driven methodology is that it allows for progressive change as epistemic circumstances change across time. [29]

Another alternative to traditional epistemological methodology in epistemology is methodological naturalism, advocated for by Willard Quine, Hilary Kornblith and Alvin Goldman. [30] Methodological naturalism was first explicitly proposed by Quine as part of his project to naturalise epistemology. [31] Quine argued for the radical position that traditional epistemological methods had failed to deliver the results they had aimed for (such as an adequate response to the problem of induction) and as a result they should be abandoned and completely replaced with empirical psychology, a view which has since become known as "replacement naturalism". [32] Kornblith and Goldman adopted more moderate forms of naturalism which allow for a place for epistemology but one that is informed by developments in science rather than being an entirely autonomous discipline. [33] According to Kornblith, the subject matter of epistemology is not our concept of knowledge but the real and robust phenomenon of knowledge itself which, according to Kornblith, is a natural kind and this means that investigation into knowledge is a posteriori, not a priori. According to Kornblith, whilst philosophers' intuitions may be able to identify features of the shared concept of knowledge, the concept itself may be incorrect about the true nature of knowledge and so investigation in epistemology should use empirical methods just like investigation into any other external phenomenon in science. Kornblith further argues that epistemological methodology should be empirical rather than intuition-based because intuitions are historically conditioned and slow to change when new evidence is found. [34] Goldman offered an even more moderate view which places appeals to intuition as an ineliminable part of epistemological methodology because even if we engage in empirical study of knowledge, we need some concept of what counts as knowledge in the first place. Despite this, his methodology is still naturalistic because it rejects the idea that justification is a concept that can be analysed into its necessary and sufficient conditions via intuitive judgements, instead identifying it with an entirely psychological process, and because he views scientific research as necessarily informing what actual psychological processes could count as justification once an adequate conceptualisation of it has been found. [35]

Feminist philosophy has extended various of these criticisms of traditional epistemology from a feminist perspective and advocated for feminist methods in epistemology. For example, Sally Haslanger has argued from a pragmatist feminist perspective that androcentric bias is widespread within epistemic practice and concepts and as such the use that they provide for us should be re-evaluated so that they can be reformed to better serve their purposes within epistemology. Louise Antony and Elizabeth Anderson have embraced feminist forms of naturalist methodology which maintain naturalism's dedication to an empirical approach whilst making a space for normative feminist ideals such as eliminating androcentric bias. Antony argues that the "bias of paradox"—the tension between feminism's criticism of the bias in androcentric perspectives on the one hand and the feminist idea that all methods, including feminist methods, must be biased by their values and interests on the other—can be resolved by naturalism. She argues that feminists should not attempt to argue from a neutral perspective but should show through empirical work that feminist values and approaches are better at producing true theories than androcentric ones. [36] [37]

Metanormativity

Epistemic language often includes sentences with a normative appearance; for example "you should believe in the evidence" or "it is good to be an open-minded researcher". This normative appearance of epistemic language gives rise to many metanormative questions such as whether epistemic semantics is truly normative, whether or not there are objective epistemic facts about what we ought to believe, how we could ever gain knowledge of such facts as well as whether or not they could fit into a naturalistic philosophy, and the relationship between epistemology and ethics as normative disciplines. [38]

As in meta-ethics, views about the semantics of epistemology can be divided into cognitivism and non-cognitivism. Epistemic cognitivism holds that epistemic judgements such as "you should believe in the evidence" express beliefs about facts about the world and so characteristically aim at the truth. Epistemic non-cognitivism, on the other hand, holds that such judgements do not express beliefs, instead expressing the desires or attitudes of the speaker, and so are not truth-apt. [39]

Likewise, views about the metaphysics of epistemology can be divided into epistemic realism and anti-realism. Epistemic realism is the view that mind-independent epistemic facts, reasons and properties exist. Epistemic realism generally also holds that epistemic facts provide categorical reasons for belief (i.e. reasons that apply to agents regardless of their desires or goals). Epistemic anti-realism denies the existence of such epistemic facts, reasons and properties, instead characterising them as mind-dependent, and argues that mind-dependent facts provide us with only with instrumental reasons (i.e. reasons that only apply to agents depending on their desires and goals). Anti-realist theories are generally thought to fit well with naturalist philosophy because they ground normative epistemic facts in descriptive natural facts such as facts about human psychology. [40] A view which seeks to find a middle ground between realism and anti-realism is constructivism (also known as constitutivism) which argues that normative truths are constructed by agents such that epistemic facts are grounded by or constitutive of facts about agents (such as facts about their desires or about the pre-conditions of their agency). [41]

There are broadly two positions about the relationship between metaepistemology and metaethics: the parity thesis and the disparity thesis. The parity thesis holds that because metaethics and metaepistemology have important structural similarities to one another, their answers to metanormative questions such as whether there are any normative facts will be the same. For example, according to the parity thesis, if epistemic realism is true, then moral realism must also be true. The parity thesis has been used in "companions-in-guilt" arguments which aim to extend arguments for or against realism in metaepistemology to metaethics, and vice versa. For example, Terence Cuneo has argued that denying the existence of epistemic facts is self-defeating because it requires arguing that we should believe that there are no facts about what we should believe. According to this argument, there must be epistemic facts and, given the parity premise, also moral facts. Similarly utilising the parity premise, Sharon Street, Allan Gibbard and Matthew Chrisman have argued that reasons for being moral anti-realists extend to epistemic anti-realism. In contrast to the parity thesis, the disparity thesis holds that there is some important disparity between metaethics and metaepistemology which means that their answers to metanormative questions could be very different from one another. For example, Chris Heathwood argues that moral facts are irreducibly normative whilst epistemic facts are reducible to descriptive facts such as facts about evidence and probability. As a result, he thinks that we have reason to be moral realists but not necessarily epistemic realists. [42] [43]

Related Research Articles

In analytic philosophy, anti-realism is a position which encompasses many varieties such as metaphysical, mathematical, semantic, scientific, moral and epistemic. The term was first articulated by British philosopher Michael Dummett in an argument against a form of realism Dummett saw as 'colorless reductionism'.

<span class="mw-page-title-main">Epistemology</span> Branch of philosophy concerning knowledge

Epistemology is the branch of philosophy concerned with knowledge. Epistemologists study the nature, origin, and scope of knowledge, epistemic justification, the rationality of belief, and various related issues. Debates in (contemporary) epistemology are generally clustered around four core areas:

  1. The philosophical analysis of the nature of knowledge and the conditions required for a belief to constitute knowledge, such as truth and justification
  2. Potential sources of knowledge and justified belief, such as perception, reason, memory, and testimony
  3. The structure of a body of knowledge or justified belief, including whether all justified beliefs must be derived from justified foundational beliefs or whether justification requires only a coherent set of beliefs
  4. Philosophical skepticism, which questions the possibility of knowledge, and related problems, such as whether skepticism poses a threat to our ordinary knowledge claims and whether it is possible to refute skeptical arguments

In metaphilosophy and ethics, metaethics is the study of the nature, scope, and meaning of moral judgment. It is one of the three branches of ethics generally studied by philosophers, the others being normative ethics and applied ethics.

In its most common sense, philosophical methodology is the field of inquiry studying the methods used to do philosophy. But the term can also refer to the methods themselves. It may be understood in a wide sense as the general study of principles used for theory selection, or in a more narrow sense as the study of ways of conducting one's research and theorizing with the goal of acquiring philosophical knowledge. Philosophical methodology investigates both descriptive issues, such as which methods actually have been used by philosophers, and normative issues, such as which methods should be used or how to do good philosophy.

Relativism is a family of philosophical views which deny claims to objectivity within a particular domain and assert that valuations in that domain are relative to the perspective of an observer or the context in which they are assessed. There are many different forms of relativism, with a great deal of variation in scope and differing degrees of controversy among them. Moral relativism encompasses the differences in moral judgments among people and cultures. Epistemic relativism holds that there are no absolute principles regarding normative belief, justification, or rationality, and that there are only relative ones. Alethic relativism is the doctrine that there are no absolute truths, i.e., that truth is always relative to some particular frame of reference, such as a language or a culture. Some forms of relativism also bear a resemblance to philosophical skepticism. Descriptive relativism seeks to describe the differences among cultures and people without evaluation, while normative relativism evaluates the word truthfulness of views within a given framework.

<span class="mw-page-title-main">Applied philosophy</span> Branch of philosophy

Applied philosophy is a branch of philosophy that studies philosophical problems of practical concern. The topic covers a broad spectrum of issues in environment, medicine, science, engineering, policy, law, politics, economics and education. The term was popularised in 1982 by the founding of the Society for Applied Philosophy by Brenda Almond, and its subsequent journal publication Journal of Applied Philosophy edited by Elizabeth Brake. Methods of applied philosophy are similar to other philosophical methods including questioning, dialectic, critical discussion, rational argument, systematic presentation, thought experiments and logical argumentation.

Ethical intuitionism is a view or family of views in moral epistemology. It is foundationalism applied to moral knowledge, the thesis that some moral truths can be known non-inferentially. Such an epistemological view is by definition committed to the existence of knowledge of moral truths; therefore, ethical intuitionism implies cognitivism.

Contextualism, also known as epistemic contextualism, is a family of views in philosophy which emphasize the context in which an action, utterance, or expression occurs. Proponents of contextualism argue that, in some important respect, the action, utterance, or expression can only be understood relative to that context. Contextualist views hold that philosophically controversial concepts, such as "meaning P", "knowing that P", "having a reason to A", and possibly even "being true" or "being right" only have meaning relative to a specified context. Other philosophers contend that context-dependence leads to complete relativism.

Naturalized epistemology is a collection of philosophic views concerned with the theory of knowledge that emphasize the role of natural scientific methods. This shared emphasis on scientific methods of studying knowledge shifts focus to the empirical processes of knowledge acquisition and away from many traditional philosophical questions. There are noteworthy distinctions within naturalized epistemology. Replacement naturalism maintains that traditional epistemology should be abandoned and replaced with the methodologies of the natural sciences. The general thesis of cooperative naturalism is that traditional epistemology can benefit in its inquiry by using the knowledge we have gained from the cognitive sciences. Substantive naturalism focuses on an asserted equality of facts of knowledge and natural facts.

Laurence BonJour is an American philosopher and Emeritus of Philosophy at the University of Washington.

Experimental philosophy is an emerging field of philosophical inquiry that makes use of empirical data—often gathered through surveys which probe the intuitions of ordinary people—in order to inform research on philosophical questions. This use of empirical data is widely seen as opposed to a philosophical methodology that relies mainly on a priori justification, sometimes called "armchair" philosophy, by experimental philosophers. Experimental philosophy initially began by focusing on philosophical questions related to intentional action, the putative conflict between free will and determinism, and causal vs. descriptive theories of linguistic reference. However, experimental philosophy has continued to expand to new areas of research.

Hilary Kornblith is an American philosopher. He is a professor of philosophy at the University of Massachusetts Amherst and one of contemporary epistemology's most prominent proponents of naturalized epistemology.

Epistemology or theory of knowledge is the branch of philosophy concerned with the nature and scope (limitations) of knowledge. It addresses the questions "What is knowledge?", "How is knowledge acquired?", "What do people know?", "How do we know what we know?", and "Why do we know what we know?". Much of the debate in this field has focused on analyzing the nature of knowledge and how it relates to similar notions such as truth, belief, and justification. It also deals with the means of production of knowledge, as well as skepticism about different knowledge claims.

Feminist epistemology is an examination of epistemology from a feminist standpoint.

Formative epistemology is a collection of philosophic views concerned with the theory of knowledge that emphasize the role of natural scientific methods. According to formative epistemology, knowledge is gained through the imputation of thoughts from one human being to another in the societal setting. Humans are born without intrinsic knowledge and through their evolutionary and developmental processes gain knowledge from other human beings. Thus, according to formative epistemology, all knowledge is completely subjective and truth does not exist.

<span class="mw-page-title-main">Miriam Solomon</span> American philosopher

Miriam Solomon is Professor of Philosophy and Chair of the Philosophy Department as well as Affiliated Professor of Women's Studies at Temple University. Solomon's work focuses on the philosophy of science, social epistemology, medical epistemology, medical ethics, and gender and science. Besides her academic appointments, she has published two books and a large number of peer reviewed journal articles, and she has served on the editorial boards of a number of major journals.

Jennifer Nagel is a Canadian philosopher at the University of Toronto. Her research focuses on epistemology, philosophy of mind, and metacognition. She has also written on 17th century (Western) philosophy, especially John Locke and René Descartes.

<span class="mw-page-title-main">Feminist philosophy of science</span> Means of interpreting scientific evidence through a feminist lens

Feminist philosophy of science is a branch of feminist philosophy that seeks to understand how the acquirement of knowledge through scientific means has been influenced by notions of gender identity and gender roles in society. Feminist philosophers of science question how scientific research and scientific knowledge itself may be influenced and possibly compromised by the social and professional framework within which that research and knowledge is established and exists. The intersection of gender and science allows feminist philosophers to reexamine fundamental questions and truths in the field of science to reveal how gender biases may influence scientific outcomes. The feminist philosophy of science has been described as being located "at the intersections of the philosophy of science and feminist science scholarship" and has attracted considerable attention since the 1980s.

<span class="mw-page-title-main">Applied epistemology</span> Application of epistemology in specific fields

Applied epistemology refers to the study that determines whether the systems of investigation that seek the truth lead to true beliefs about the world. A specific conceptualization cites that it attempts to reveal whether these systems contribute to epistemic aims. It is applied in practices outside of philosophy like science and mathematics.

<i>Working from Within: The Nature and Development of Quines Naturalism</i> 2018 book on the philosophy of W. V. Quine

Working from Within: The Nature and Development of Quine's Naturalism is a 2018 book by Dutch philosopher and historian of analytic philosophy Sander Verhaegh. Released at a time in which there was increasing work done on Willard Van Orman Quine in the history of analytic philosophy, the book was the first to provide a full account of the historical development of his naturalism. It was also the first book to use the extensive archive materials on Quine at Harvard University's Houghton Library.

References

Citations

  1. 1 2 Carter & Sosa 2022.
  2. ↑ Kuenzle 2017, p. 77. Primary source: Firth 1959.
  3. ↑ Brandt 1967.
  4. ↑ Kuenzle 2017, p. 78. Primary source: Alston 1978, p. 275.
  5. ↑ Kuenzle 2017, pp. 78, 84.
  6. 1 2 Kuenzle 2017, pp. 84–86.
  7. 1 2 Bunnin & Yu 2009.
  8. ↑ Kuenzle 2017, pp. 84–86; Gerken 2016; Moser 2015.
  9. ↑ Kyriacou & McKenna 2018, p. 1.
  10. ↑ Gerken 2016; Kyriacou n.d.; Moser 2015.
  11. ↑ Moser 2015.
  12. ↑ Kuenzle 2017, pp. 78, 84; Kyriacou n.d., §1.
  13. ↑ Kuenzle 2017, p. 79; Kyriacou n.d., §1.
  14. ↑ Kuenzle 2017, p. 86.
  15. ↑ Bunnin & Yu 2009; Kyriacou n.d., §1.
  16. ↑ Fumerton 2006, p. 33-34.
  17. ↑ Kyriacou n.d., §1.
  18. ↑ Rysiew 2020, §1.1.
  19. ↑ Horvath & Koch 2020, §1.
  20. ↑ Weinberg 2006, p. 26; Gerken 2016, §4; Rysiew 2020.
  21. ↑ Rysiew 2020, §3.1.
  22. ↑ Primary sources: BonJour 1998 , §1.1; Bealer 1992 , §2.
  23. ↑ BonJour 1998, p. 5.
  24. 1 2 3 Gerken 2016, §4.
  25. 1 2 Gerken 2016, §4; Horvath & Koch 2020, §2.
  26. ↑ Horvath & Koch 2020, §3.
  27. ↑ Horvath & Koch 2020, §4.
  28. ↑ Primary sources: Deutsch 2015; Cappelen 2012.
  29. ↑ Kuenzle 2017, pp. 82–84. Primary source: Weinberg 2006.
  30. ↑ Rysiew 2020, §1.2.
  31. ↑ Goldman 1994, pp. 305, 316.
  32. ↑ Kuenzle 2017, pp. 15–16; Rysiew 2020, §§1-2. Primary source: Quine 1969.
  33. ↑ Rysiew 2020, §§1.2, 4-5.
  34. ↑ Kuenzle 2017, p. 22. Primary source: Kornblith 2002, pp. 1, 10–18.
  35. ↑ Rysiew 2020, §5.1. Primary source: Goldman 1994, p. 306.
  36. ↑ Kuenzle 2017, §1.5.
  37. ↑ Primary sources: Haslanger 1999; Antony 1993; Anderson 1995.
  38. ↑ Kyriacou n.d., §2; McHugh, Way & Whiting 2018, pp. 1–3.
  39. ↑ Kyriacou n.d., §3; McHugh, Way & Whiting 2018, pp. 4–5.
  40. ↑ Kyriacou n.d., §3; McHugh, Way & Whiting 2018, pp. 5–6; Kyriacou & McKenna 2018, pp. 1–2.
  41. ↑ McHugh, Way & Whiting 2018, pp. 67–68; Kyriacou & McKenna 2018, p. 3.
  42. ↑ Kyriacou n.d., §1; Kyriacou & McKenna 2018, pp. 4–5; McHugh, Way & Whiting 2018, p. 6.
  43. ↑ Primary sources: Cuneo 2007; Street 2009; Gibbard 2003; Chrisman 2007; Heathwood 2018.

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