Psychopathological delusions have a number of features that are curiously difficult to explain. Delusions are resistant to counterevidence and impervious to counterargument. Delusions are theoretically, affectively, and behaviorally circumscribed: delusional individuals often do not act on their delusions and often do not update beliefs on the basis of their delusions. Delusional individuals are occasionally able to distinguish their delusions from other beliefs, sometimes speaking of their “delusional reality.” To explain these features, I offer a model according to which, contrary to (...) appearances, delusions are not beliefs at all. Delusions are acceptances that are generated by pathologically powerful cognitive feelings. This model has implications for the way that we should think about non-pathological doxastic states and emotions. (shrink)

This paper motivates a constraint on how to explain the “sense of agency” for conscious thinking. It argues that a prominent model fails to satisfy the constraint before sketching an alternative that does. On the alternative, punctate acts of conscious thinking, such as episodes of inner speech, are recognizable as our deeds because they are recognizable as parts of complex cognitive activities, which we know non-observationally in virtue of holding intentions to perform them.

I argue for the existence of imaginative beliefs: mental states that are imaginative in format and doxastic in attitude. I advance two arguments for this thesis. First, there are imaginings that play the functional roles of belief. Second, there are imaginings that play the epistemic roles of belief. These arguments supply both descriptive and normative grounds for positing imaginative beliefs. I also argue that this view fares better than alternatives that posit distinct imaginative and doxastic states to account for the (...) same phenomena. Along the way, I demonstrate the theoretical significance of imaginative beliefs by showing how they pose a challenge for standard taxonomies of the mind, clarify the sense in which imagination is occurrent and voluntary, explain the justificatory role of the imagination, and point to a deep but underappreciated symmetry between imagistic and non-imagistic thought. (shrink)

(English:) The article introduces conspiracy beliefs and considers the most relevant literature in the field. The main purpose of the article is phenomenological: it proposes to understand conspiracy beliefs within the broader genre of what I call general conceptual beliefs (or simply, general beliefs), whose central features are big issues, logical-conceptual fallacies, pseudorationality, bad faith, and monological bias. I claim that general beliefs are functional to a motivationally biased and inherently dishonest communication (the same one that conspiracy narratives share with (...) political extremism, religious fundamenta-lism and other eccentric belief systems), which is essentially conceived for practical and self-representational purposes (not for knowledge). The article argues against the mere stigmatization of this phenomenon and rather seeks to understand it by looking at a broader and murkier region of human experience, for which we are all responsible in some way. -/- (Castellano:) El artículo introduce al análisis de las creencias conspirativas y considera la literatura más relevante sobre el tema. El objetivo del escrito es fenomenológico: entender las creencias conspirativas colocándolas en un género más amplio, las creencias conceptuales generales (o, simple-mente, creencias generales), cuyas carac-terísticas esenciales son: grandes temas, falacias lógico-conceptuales, pseudoracionalidad, mala fe y tendencia monológi-ca. Las creencias generales son funcionales a una comunicación sesgada y tendencialmente deshonesta, la misma que las his-torias conspirativas comparten con ex-tremismos políticos, fundamentalismos religiosos y otros sistemas de creencias excéntricos, cuya finalidad es eminentemente práctica y autorepresentativa (no teorética). El artículo se opone a la mera estigmatización del fenómeno y trata más bien de comprenderlo, observando una región más amplia y turbia de la experiencia humana, de la que todos somos responsables de alguna manera. (shrink)

Cats and dogs are the same kind of thing in being mammals, even if cats are not a kind of dog. In the same way, remembering and imagining might be the same kind of mental state, even if remembering is not a kind of imagining. This chapter explores whether episodic remembering, on the one hand, and future and counter-factual directed imagistic imagining, on the other, may be the same kind of mental state in being instances of the same cognitive attitude. (...) I outline a continuist position where all three involve the same judgment-like attitude and compare its advantages to a discontinuist alternative where remembering requires use of its own distinctive attitude. Reasons are given for favoring a version of the continuist position, though this chapter’s focus is on the metatheoretical questions of how to go about understanding remembering in terms of a content and attitude pair, and which considerations are relevant when deciding among competing content/attitude pairs. (shrink)

La concepción de Marcus sobre las creencias se aplica al debate centrado en la cuestión: "¿Son creencias los delirios?" Dos consecuencias que se siguen de ello son: i) que la cuestión "¿Son creencias los delirios?" necesita reformularse, y ii) que la respuesta es: "No, algunos pacientes que sufren delirios no creen lo que, "prima facie", parecen creer".

The present thesis surveys different philosophical approaches to the nature of delusions: specifically, their ontology. However, since none of the various theories of the nature of delusions succeeds, I argue that there must be something problematic about the form of the analyses commonly offered. My general conclusion is that one cannot characterize delusions without taking away what it is distinctive about them.

The standard position in psychiatry maintains that delusions are beliefs. However, the features of delusions often diverge from those typically associated with belief. This discrepancy has given rise to what I refer to as the doxastic status debate, which concerns whether delusions are best characterized as “beliefs.” Despite efforts, there has been little progress in settling this debate. I argue that the debate has been stymied because it’s largely a verbal dispute (Chalmers, 2011). I then attempt to advance the debate (...) into substantive territory by putting forward the hetero-dynamic property cluster (HDPC) model. According to the HDPC model, delusions are mental states characterized by an odd and unstable cluster of features, which, when manifested, gives delusions the appearance of straddling the line between two distinct types of attitudes. (shrink)

I develop and argue for a novel theory of the mental state of identity confusion. I also argue that this mental state can corrupt the proper function of singular terms in linguistic communication. Finally, I propose a theory according to which identity confusion should be treated as a the source of a new sort of linguistic performance error, similar to malapropism, slips of the tongue, and so-called intentional obfuscation (inducing false belief by manipulating language in specific ways). -/- Going into (...) a bit more detail, I start by arguing that contemporary analytic philosophy, and philosophy of language in particular, has been dominated by a ‘puzzle-driven’ methodology. This tradition, I claim, seeks to provide a coherent system for describing semantic features of all conceivable cases where a speaker is confused about the identity or distinctness of an object. On my view, identity confusion is a mental state of an agent who either believes falsely that a is identical to b or believes falsely that a is not identical to b. I show how many influential arguments in philosophy – e.g., Kripke on semantic reference and speaker’s reference – are invalidated because of false assumptions about the state of identity confusion. -/- More positively, I assume an ‘explanation-driven’ approach, combining strands in Gricean intentionalism and Ruth Millikan’s teleosemantics. On this view, confused speakers are ‘sub-optimal’: their mental state disrupts the proper function of the relevant singular terms in their idiolects. Furthermore, I flesh out a theoretically fruitful notion of ‘edenic reference,’ which idealizes away from confusion in defining the optimal or stabilizing function of singular terms. I argue that speakers must satisfy certain broadly cognitive constraints if their utterances are to play a role in explaining the maintenance of a practice of using a singular term in a linguistic community. (shrink)

O modelo causal de introspecção tem recebido muitas críticas e, de fato, nos últimos anos, tem caído em desuso no mundo filosófico. Neste artigo defendo o modelo e sustento que ele é um excelente candidato, dado um compromisso realista para com o mental, para explicar o nosso acesso introspectivo peculiar, mas contingente, às crenças.

In this paper we have two main aims. First, we present an account of mood-congruent delusions in depression (hereafter, depressive delusions). We propose that depressive delusions constitute acknowledgements of self-related beliefs acquired as a result of a negatively biased learning process. Second, we argue that depressive delusions have the potential for psychological and epistemic benefits despite their obvious epistemic and psychological costs. We suggest that depressive delusions play an important role in preserving a person’s overall coherence and narrative identity at (...) a critical time, and thus can be regarded as epistemically innocent. (shrink)

We show how an epistemology informed by cognitive science promises to shed light on an ancient problem in the philosophy of mathematics: the problem of exactness. The problem of exactness arises because geometrical knowledge is thought to concern perfect geometrical forms, whereas the embodiment of such forms in the natural world may be imperfect. There thus arises an apparent mismatch between mathematical concepts and physical reality. We propose that the problem can be solved by emphasizing the ways in which the (...) brain can transform and organize its perceptual intake. It is not necessary for a geometrical form to be perfectly instantiated in order for perception of such a form to be the basis of a geometrical concept. (shrink)

According to Millian Descriptivism, while the semantic content of a linguistically simple proper name is just its referent, we often use sentences containing such expressions “to make assertions…that are, in part, descriptive” (Soames 2008). Against this view, I show, following Ted Sider and David Braun (2006), that simple sentences containing names are never used to assert descriptively enriched propositions. In addition, I offer a diagnosis as to where the argument for Millian Descriptivism goes wrong. Once we appreciate the distinctive way (...) in which this account fails, we can better appreciate the very modest role that associated descriptive information plays in the pragmatics of proper names. (shrink)

Clinical delusions are widely characterized as being pathological beliefs in both the clinical literature and in common sense. Recently, a philosophical debate has emerged between defenders of the commonsense position (doxasticists) and their opponents, who have the burden of pointing toward alternative characterizations (anti-doxasticists). In this chapter, I argue that both doxasticism and anti- doxasticism fail to characterize the functional role of delusions while at the same time being unable to play a role in the explanation of these phenomena. I (...) also argue that though a more nuanced view of belief in which mental states are more or less belief-like instills a healthy skepticism towards the precision of folk-psychological concepts, such a stance fails to be of use in building a theory of delusion that will be able to bridge different levels of explanation, such as the phenomenology and neurobiology of delusion. Thus, I advocate moving past the question ‘Are delusions beliefs?’ and their description as propositional attitudes toward the description of the processes that generate delusion, with a view toward explaining, rather than explaining away, the personal-level aspects of the phenomenon that have been made inscrutable by investing in doxastic terminology. (shrink)

This dissertation focuses on teleology and functions in biology. More precisely, it focuses on the scientific legitimacy of teleofunctional attributions and explanations in biology. It belongs to a multi-faceted debate that can be traced back to at least the 1970s. One aspect of the debate concerns the naturalization of functions. Most authors try to reduce, translate or explain functions and teleology in terms of efficient causes so that they find their place in the framework of the natural sciences. Our approach (...) here is radically different, as we question the premise that teleological explanations are disguised causal explanations. On the contrary, we defend that they are acceptable in natural sciences and in biology in particular. We challenge the idea that teleological explanations are immature causal explanations, as well as the idea that teleology and functions are some sort of intentional explanations. We therefore reject the accusations of anthropomorphism, vitalism and finalism. On the contrary, we defend that teleology, causality and intentionality correspond to different, autonomous and complementary modes of representation of the outside world. -/- ———[FRANÇAIS]——— -/- Ce travail de thèse porte sur la téléologie et les fonctions en biologie. Plus précisément, il porte sur la légitimité scientifique des attributions et des explications téléofonctionnelles en biologie. Il s’inscrit dans le cadre d’un débat à plusieurs facettes que l’on peut faire remonter au moins jusqu’aux années 1970 et qui est encore très actif aujourd’hui. L’un des aspects du débat porte sur la naturalisation des fonctions, c’est-à-dire sur la manière de les réduire, de les traduire ou de les expliciter en termes de causes efficientes de sorte qu’elles trouvent leur place dans le cadre des sciences de la nature. Notre approche ici est radicalement différente, car nous remettons en question la prémisse selon laquelle les explications téléologiques seraient des explications causales déguisées. Nous défendons au contraire qu’elles sont acceptables en tant que telles aussi bien de façon générale que dans le domaine scientifique et en particulier en biologie. De façon générale, nous remettons en question l’idée selon laquelle la pensée téléologique serait une pensée causale immature, ainsi que sa dépendance présumée vis-à-vis de la psychologie, c’est-à-dire de l’intentionnalité. Nous rejetons donc les accusations d’anthropomorphisme, de vitalisme et de finalisme formulées contre elle. Nous défendons au contraire que la téléologie, la causalité et l’intentionnalité correspondent à des modes différents, autonomes et complémentaires de représentation du monde extérieur. (shrink)

The study’s main thesis is that respect for some moral values is a condition for methodologically rational decisions, namely, decisions which do not satisfy the condition are either not methodologically rational at all, or not fully rational. The paper shows supporting arguments for the thesis in terms of the philosophical theories by Aristotle, Immanuel Kant, Tadeusz Kotarbiński, Max Weber, Jean-Paul Sartre and some other thinkers. Their presentation undergoes phenomenological analysis of the phenomenon of decision making.

Many philosophers regard the persistence of philosophical disputes as symptomatic of overly ambitious, ill-founded intellectual projects. There are indeed strong reasons to believe that persistent disputes in philosophy (and more generally in the discourse at large) are pointless. We call this the pessimistic view of the nature of philosophical disputes. In order to respond to the pessimistic view, we articulate the supporting reasons and provide a precise formulation in terms of the idea that the best explanation of persistent disputes entails (...) that they are pointless. We then show how to answer the pessimistic argument. Taking a well-known mathematical controversy as our paradigm example, we argue that some persistent disputes reflect substantive disagreements at the “meta-analytic” level, i.e., disagreements about the best way, among quite different candidates, to understand the topic at issue, and the best associated cluster of analytic truths one should accept concerning it. Moreover, our concrete example shows that such meta-analytic disagreements can in principle be settled and yield a genuine theoretical (as opposed to merely pragmatic) breakthrough. We conclude optimistically that persistent disputes can be an important means of fostering epistemic progress. (shrink)

In this chapter, our focus is the role played by notions of rationality in the diagnosis of mental disorders, and in the practice of overriding patient autonomy in psychiatry. We describe and evaluate different hypotheses concerning the relationship between rationality and diagnosis, raising questions about what features underpin psychiatric categories. These questions reinforce widely held concerns about the use of diagnosis as a justification for overriding autonomy, which have motivated a shift to mental incapacity as an alternative justification. However, this (...) approach too has recently been criticized from a mental disability rights perspective. Our analysis of the relationship between mental capacity and rationality is used to illuminate these concerns, and to investigate further the relationship between rationality and psychiatric diagnosis. (shrink)

According to one theory, the brain is a sophisticated hypothesis tester: perception is Bayesian unconscious inference where the brain actively uses predictions to test, and then refine, models about what the causes of its sensory input might be. The brain’s task is simply continually to minimise prediction error. This theory, which is getting increasingly popular, holds great explanatory promise for a number of central areas of research at the intersection of philosophy and cognitive neuroscience. I show how the theory can (...) help us understand striking phenomena at three cognitive levels: vision, sensory integration, and belief. First, I illustrate central aspects of the theory by showing how it provides a nice explanation of why binocular rivalry occurs. Then I suggest how the theory may explain the role of the unified sense of self in rubber hand and full body illusions driven by visuotactile conflict. Finally, I show how it provides an approach to delusion formation that is consistent with one-deficit accounts of monothematic delusions. (shrink)

This thesis is set out as a collection of self-standing essays. Throughout these essays, I try to illuminate a number of controversies surrounding the way in which delusions are formed, and relatedly, their nature and epistemic standing. In Chapter 2, after an introductory chapter, I flesh out a new ‘endorsement’ approach to the Capgras delusion, the main idea being that the delusion is formed by endorsing the content of a metaphorical-perceptual state in which a loved one is represented metaphorically as (...) an imposter. In Chapter 3, I take issue with the idea, prevalent in the literature, that Bayesian accounts of inference in delusions are best characterised as versions of ‘explanationism’. Taking one such influential account as a test case, I argue that it is no more or less compatible with the endorsement alternative, which says delusions are acquired non-inferentially from experience. In Chapter 4, I examine a recent critique of predictive processing theories of delusions, according to which such theories suffer two limitations: they fail to explain why an agent believes something delusional as opposed to nothing at all or something else; they fail to explain how delusional hypotheses are generated in the first place. I suggest ways in which these concerns might be addressed. In Chapter 5, I consider how the Spinozan theory of belief fixation can improve the prospects of doxasticism about delusions. Doxasticism has been criticised on the grounds that delusions typically do not abide by rational standards which we expect beliefs to conform to. If belief fixation is Spinozan, I argue, these deviations from rationality are not just compatible with, but supportive of, their status as beliefs. In Chapter 6, I ask whether misidentification delusions formed via endorsement processes have any measure of perceptual justification. To give the best chance of getting a ‘yes’ answer, I address the question from the perspective of perceptual dogmatism, as this appears the best option if we are to grant at least defeasible justifiedness to MDs. I argue that, even so, MDs are completely unjustified. (shrink)

In this talk I present the main results from Anta (2021), namely, that the theoretical division between Boltzmannian and Gibbsian statistical mechanics should be understood as a separation in the epistemic capabilities of this physical discipline. In particular, while from the Boltzmannian framework one can generate powerful explanations of thermal processes by appealing to their microdynamics, from the Gibbsian framework one can predict observable values in a computationally effective way. Finally, I argue that this statistical mechanical schism contradicts the Hempelian (...) (1958) thesis that the predictive power of a scientific theory is directly proportional to its explanatory potential, and vice versa. (shrink)

This paper specifies competences and skills of methodologically rational decision making and their impact on security of organisations. The study indicates some reasons for developing the competencies and skills in education, professional development and taking them into account in the recruitment. It is the practical aim of this paper. Its scientific aim is to formulate and to partly justify general hypotheses concerning the impact of methodologically rational and irrational attitudes of members of organisations on their security. We apply the method (...) of ideal types of Max Weber and phenomenological analyses, which concern intentionality of methodologically rational and irrational mental attitudes. (shrink)

The thesis of this paper is that – in order to avoid trivializations – a Philosophy of Birth needs to elaborate a precise concept of transformation and distinguish it carefully from that of adaptation. While transformation goes beyond the limited self-referential perspective of an individual and, on the social level, of the gregarious identity, adaptation aims at strengthening or preserving the old self-referential equilibrium. Transformation is driven by what Zambrano has called, with an exceptionally happy expression, the “hunger to be (...) born completely”. Such a hunger pushes one to continue one’s own birth through the encounter with the Other. Transformation has a creative feature that is made possible by two factors: the surplus of the effect over the cause, and the priority of the real over the possible. These premises lead to a radical questioning of the primacy of the possible on the real, at least as it has been conceived so far in mainstream Western philosophy, with few exceptions, such as Schelling, Bergson and Scheler. In the first part of this text, I shall consider a new Philosophy of Birth in the light of the concept of transformation and in this regard deal with several core themes such as the hunger to be born completely, the new beginning, creative time, the priority of the real over the possible, the limits of finalism, the surplus of effect over cause, and the creative force that expresses itself in the act of ideation. In the second part, I shall analyze the relation between birth and death and focus especially on their intimate and reciprocal connection by referring to the image of the seed that, after falling on the ground, germinates and breaks its own integument. (shrink)

This dissertation combines two scientific disciplines and research fields, namely philosophy and psychopathology. Within such a wide field of investigation, two precise perspectives are to be adopted in this inquiry: stemming from the first field, the phenomenological perspective on subjectivity and intersubjectivity; stemming from the second, the psychopathological perspective on schizophrenia. The combination of philosophy and psychopathology has often proven fruitful. Moreover, the main motivation for such combined approach is justified by the strong belief that, when critically used, phenomenology offers (...) a viable method of studying the first-personal perspective of experience, including the experiences of people with mental disorders. Philosophical analysis can thereby be used as a means to evaluate the meaning and adequacy of psychopathological concepts and ideas. As a result, phenomenological psychopathology may help understand what is often claimed to be incomprehensible. Particularly for the understanding of schizophrenia, this is taken to be a valuable contribution. For more than twenty years now, the phenomenological approach to schizophrenia has developed a strong and influential hypothesis on the basic alterations of this disorder. Schizophrenia, it is claimed, is a disorder of subjectivity, and more specifically, a disorder of the minimal self. Simultaneously, and often in conjunction, philosophical research on the self has vastly proliferated. The vivid interaction between these two fields makes the phenomenology of schizophrenia a good example of effective interdisciplinary work. Within the philosophical debate on subjectivity, intersubjectivity, or the relation between self and other, is currently a key topic. However, this has not significantly influenced the psychopathology of schizophrenia yet. The initial and fundamental claim of this dissertation is indeed that a renewed evaluation and inclusion of intersubjectivity, next to subjectivity, is to increase the validity of the phenomenological approach to schizophrenia. This would allow the previous hypothesis on schizophrenia as minimal self disorder to be challenged, criticized, or complemented, which would accordingly increase the significance and its clinical value. What I will attempt to do in this dissertation is then to thoroughly evaluate the role of intersubjectivity in schizophrenia. It will hence become clear what this role and its significance are. Consequently, I will finally argue that the basic alterations of schizophrenia concern both subjectivity and intersubjectivity. My argument is developed in four chapters. In the first, I introduce the topic of the self, including the distinction between the minimal and the extended self. This chapter equally introduces schizophrenia as a psychiatric concept, and three different clinical approaches are discussed, among which the phenomenological approach in most detail. After the topics of the self and schizophrenia, I introduce intersubjectivity, notably from a developmental-psychological perspective. By way of status quaestionis, I recapitulate the current research on intersubjectivity and schizophrenia. It will become clear that this research is relatively scarce. I then conclude the chapter with a full formulation of the two research questions informing this dissertation, namely Is schizophrenia an intersubjectivity-disorder? and Which self-concept is suited to define schizophrenia as a self and intersubjectivity disorder? The second chapter examines the phenomenology of intersubjectivity. The exact delineation of what is meant here by intersubjectivity will allow the reader to acknowledge its extent and variety. This chapter is aimed to provide the necessary philosophical tools to analyse schizophrenia in the light of intersubjectivity. In the third chapter I turn to psychopathology. In the first section, I analyse the work of seven major psychopathologists on schizophrenia. The goal of this section is to look for elements of intersubjectivity in their accounts of schizophrenia. Many of these psychopathologists have been influential for the development of the current self-disorder hypothesis, and the investigation intends to show how some crucial intersubjective elements in their work have been neglected. In the second section of this chapter, I focus on the symptoms, signs, and phenomena of schizophrenia that relate to intersubjectivity. This chapter finally offers all the material needed to positively answer the first research question. In the fourth chapter, I bring together psychopathology and philosophy, and I attempt to answer the two research questions. Since Chapter 3 allows me to affirmatively answer the first question, I examine whether the current self-disorder hypothesis is adequate to integrate intersubjectivity disturbances. It will appear that it is not, and the first section of this chapter consequently deals with the question why intersubjectivity and its disturbances have been neglected until now. In the second section it will become clear that no different self-concept is required, but that schizophrenia primarily concerns a particular capacity or orientation of subjectivity. I introduce the concept of open subjectivity and thereby answer the second research question. By describing schizophrenia as a disturbance of open subjectivity, I am finally able to integrate both self-disturbances and intersubjectivity-disturbances into a coherent and unified theory. To conclude this dissertation, I summarize and recapitulate its major issues, questions, and results in Chapter 5. Both clinical implications and possible future research are also discussed here. (shrink)

b is collection focuses on conceptual issues that arise within the theoretical dimension of psychiatry. In particular, the invited contributions centre on the nature of psychiatric classification and explanation by addressing important methodological issues. Two strategies are exemplified here. Either the authors directly contribute to foundational issues in psychiatry concerning the nature of psychiatric classification and explanation; or they provide a conceptual analysis that can play a role in developing adequate theories of specific psychiatric disorders.

In this thesis I propose a new way of understanding depressive illness as not exclusively harmful, but as related to particular, empirically evidenced, epistemic and pragmatic benefits for the subject, alongside the associated costs. For each of the benefits considered, I provide and concisely analyse the empirical evidence both in its favour and against it, suggest ways in which these benefits could apply in the circumstances presented, discuss some outstanding problems for that application as stated, and describe potential implications. The (...) issues discussed involve topics in cognitive psychology as well as in ethics, which I regard as complementary to the debate. I take the view that depression related phenomena such as low mood, low self-esteem, and mood-congruent delusions offer potential benefits to a subject under certain circumstances, but not under others. In discussing the hypotheses presented, I argue for a more complex view of depression, which includes its potential epistemic and pragmatic benefits as well as its costs and I propose possible directions for future research. (shrink)

Extant philosophical accounts of schizophrenic alien thought neglect three clinically signifi cant features of the phenomenon. First, not only thoughts, but also impulses and feelings, are experienced as alien. Second, only a select array of thoughts, impulses, and feelings are experienced as alien. Th ird, empathy with experiences of alienation is possible. I provide an account of disownership that does justice to these features by drawing on recent work on delusions and selfknowledge. Th e key idea is that disownership occurs (...) when there is a failure of rational control over one’s mind. Th is produces a clash between the deliverances of introspection and practical enquiry as ways of knowing one’s mind. Th is explanation places disownership on a continuum with more common aspects of our psychological life, such as addiction, akrasia, obsessional thinking, and immoral, selfi sh or shameful thoughts. I conclude by addressing objections, and exploring the relevance of my account to questions in the philosophy of psychiatry concerning the validity of our current taxonomy of symptoms, and the nature of psychiatric classifi cation.. (shrink)

Background Delusions are a significant feature of mental illnesses and can occur in many clinical conditions (Maher, 2001) yet the standard clinical definition (American Psychiatric Association. DSM-5 Task Force, 2013) is highly contentious. Much of the literature holds elements such as bizarreness of content and incorrigibility of belief as defining factors of delusion. However, on closer inspection, delusions are not so easy to pin down. The difficulty in defining delusion is not a new one as “…we are all capable of (...) having convictions and it is a universal human characteristic to hold on to our own mistaken judgements.” (Jaspers, 1963, p.63). Objective I intend to highlight some of the difficulties associated with the definition of delusion and perhaps clarify the phenomenology. Methodology I examine some of the philosophical, psychological and psychiatric literature with regard to the definition of delusion. I also consider my experience of my own mental activity and experiences from my therapeutic work. Results/Conclusion I identify that delusions are a heterogeneous group and that there may be more than one ‘class’ of delusion. I also show that delusions are multi-dimensional with characteristics on a continuum with normal beliefs and that further research is needed to clarify the phenomenology. (shrink)