The dynamics of ancient civilisations according to credited historians can be explained by means of a simple linear time-invariant feedback model whose loop only consists of a first-order process and a pure time delay. It is shown that, despite its simplicity, this model can give rise to a variety of responses, either oscillatory or aperiodic, such as those envisaged by A. Toynbee. Since modern civilisations are characterised by fast parameter variations, their description calls instead for a time-variant model. Simulations with (...) the linear parameter-varying model obtained from the aforementioned LTI model by letting its parameter vary are carried out to show the influence of different scenarios on the system response. Even if this model is elementary, it is believed that it may serve as a stimulating “tool for thought” in the ever-popular debate on the growth and decline of civilisations. (shrink)

Through the use of such "folk" concepts as belief, desire, intention, and expectation, Daniel Dennett asserts in this first full scale presentation of...

Based on structural differences between spoken and written language, the purpose of this paper was to investigate whether spoken and written communication imply a different representation in reporting an experienced dream. In fact, the clausal-dynamic quality of the former and nominal-synoptic quality of the latter, with the consequent differences in length, cohesion and density, could enhance/reduce the perceptual character and narrative structure of report features often considered in order to assess sleep mentation. In particular, we wondered whether, after eliminating all (...) the elements responsible for the more conspicuous quantitative differences across the two forms , we would obtain two equivalent ways of reporting dreams. Three hundred and two subjects, raging in age from 18 to 40 years, participated as volunteers in the study and were asked to complete a dream diary daily for 14 days, by tape-recording their own dreams and putting them down in writing. The reports were analyzed by a psycholinguistic system. Results indicated that the report modality is able to affect the dream experience representation, conditioning the figurative translation carried out by the tester: written forms show a loss of hallucinatory information and a non-complete correspondence also of the bizarreness features with respect to the spoken texts. Partialling out for length eliminated any difference between spoken and written dream reports on bizarreness; on the other hand, controlling the sequence effect of the report did not introduce changes. Methodological and theoretical implications were discussed. (shrink)

A groundbreaking examination of Michel Foucault's history of truth. Many blame Michel Foucault for our post-truth and conspiracy-laden society. In this provocative work, Daniele Lorenzini argues that such criticism fundamentally misunderstands the philosopher’s project. Foucault did not question truth itself but what Lorenzini calls “the force of truth,” or how some truth claims are given the power to govern our conduct while others are not. This interest, Lorenzini shows, drove Foucault to articulate a new ethics and politics of truth-telling (...) precisely in order to evade the threat of relativism. The Force of Truth explores this neglected dimension of Foucault’s project by putting his writings on regimes of truth and parrhesia in conversation with early analytic philosophy and by drawing out the “possibilizing” elements of Foucault’s genealogies that remain vital for practicing critique today. (shrink)

In this paper, I argue that the vindicatory/unmasking distinction has so far prevented scholars from grasping a third dimension of genealogical inquiry, one I call possibilising. This dimension has passed unnoticed even though it constitutes a crucial aspect of Foucault’s genealogical project starting from 1978 on. By focusing attention on it, I hope to provide a definitive rebuttal of one of the main criticisms that has been raised against genealogy in general, and Foucauldian genealogy in particular, namely the idea that (...) Foucault’s genealogical project lacks normative grounding and is therefore ultimately incapable of telling us why we should resist and fight against the mechanisms of power it nevertheless reveals in an empirically insightful way. This conclusion, I argue, is mistaken because it conceives of Foucauldian genealogy exclusively as an unmasking or problematising method, whereas I claim that Foucault’s genealogical project possesses a possibilising dimension that provides his work with sui generis normative force. (shrink)

In a recent blog post, Joshua Clover rightly notices the swift emergence of a new panoply of “genres of the quarantine.”1 It should not come as a surprise that one of them centers on Michel Foucault’s notion of biopolitics, asking whether or not it is still appropriate to describe the situation that we are currently experiencing. Neither should it come as a surprise that, in virtually all of the contributions that make use of the concept of biopolitics to address the (...) current coronavirus pandemic, the same bunch of rather vague ideas are mentioned over and over again, while other—no doubt more interesting—Foucauldian insights tend to be ignored. In what follows, I discuss two of these insights, and I conclude with some methodological remarks on the issue of what it may mean to “respond” to the current “crisis.”. (shrink)

We discuss the hints for the disappearance of continuum space and time at microscopic scale. These include arguments for a discrete nature of them or for a fundamental non-locality, in a quantum theory of gravity. We discuss how these ideas are realized in specific quantum gravity approaches. Turning then the problem around, we consider the emergence of continuum space and time from the collective behaviour of discrete, pre-geometric atoms of quantum space, and for understanding spacetime as a kind of “condensate”, (...) and we present the case for this emergence process being the result of a phase transition, dubbed “geometrogenesis”. We discuss some conceptual issues of this scenario and of the idea of emergent spacetime in general. As a concrete example, we outline the GFT framework for quantum gravity, and illustrate a tentative procedure for the emergence of spacetime in this framework. Last, we re-examine the conceptual issues raised by the emergent spacetime scenario in light of this concrete example. (shrink)

This collection of 17 essays by the author offers a comprehensive theory of mind, encompassing traditional issues of consciousness and free will.

Dans cet article j’analyse le concept de transmutatio corporalis dans la théorie des passions de Thomas d’Aquin. Je prends en considération surtout le traité sur les passions contenu dans la Somme de théologie, mais aussi d’autres textes du maître dominicain : le Commentaire sur les Sentences, les Questions disputées sur la vérité, le bref traité Sur le mouvement du cœur. Tout d’abord, je montre comment l’idée de transmutatio corporalis est essentielle pour la définition thomasienne de la passion, puis j’identifie en (...) quoi consiste cette modification corporelle dans les principales passions. Je termine avec l’analyse de la transmutatio corporalis dans la dynamique entre l’âme et le corps, m’arrêtant notamment sur l’idée de la redundantia, à savoir le processus circulaire par lequel l’âme modifie le corps et le corps modifié intervient sur l’âme. (shrink)

The aim of this article is to investigate the reception of Husserl’s theory of meaning by Ajdukiewicz and Blaustein, two members of the analytically-oriented Lvov-Warsaw School, who, in different ways, were attracted to and confronted with Husserl’s phenomenology. The discussed hypothesis is that Ajdukiewicz’s interpretation of Logical Investigations, and his original theory of meaning influenced both Blaustein’s critical reading of Husserl’s theory of intentionality and his account of meaning-intention. After outlining the central elements of “First Logical Investigation” the paper shows (...) how it is interpreted by Ajdukiewicz in his Lvov lectures on logic and in his directival theory of meaning. What emerges is a psychological-descriptive interpretation of Husserl’s concept of meaning, and a reconsideration of his theory of intentionality within the inferential structure of beliefs in premises that motivates a person who speaks a language to believe in conclusions of a certain form. This leads Ajdukiewicz to his own original conventionalist account of meaning which is based on the identification of three main directives of meaning that represent the matrix of a given language, i.e., the grid in which each meaning finds its place. These elements allow one to demonstrate how Ajdukiewicz’s interpretation resonates in Blaustein’s critique of Husserl in his early writings, where, in addition to a psychological-descriptive reading of phenomenology we also find a conventionalist conception of meaning acts and signitive presentations. According to Blaustein, a sign can represent an object only through the conventions arising from the directives of meaning that belong to a given natural language. (shrink)

We explore the issue of spacetime emergence in quantum gravity, by articulating several levels at which this can be intended. These levels correspond to the reconstruction moves that are needed to recover the classical and continuum notion of space and time, which are progressively lost in a progressively deeper sense in the more fundamental quantum gravity description. They can also be understood as successive steps in a process of widening of the perspective, revealing new details and new questions at each (...) step. Each level carries indeed new technical issues and opportunities, and raises new conceptual issues. This deepens the scope of the debate on the nature of spacetime, both philosophically and physically. (shrink)

In this paper, I take issue with the idea that Michel Foucault might be considered a theorist of epistemic injustice, and argue that his philosophical premises are incompatible with Miranda Fricker’s. Their main disagreement rests upon their divergent ways of conceiving the relationship between reason and power, giving rise to the contrasting forms of normativity that characterize their critical projects. This disagreement can be helpfully clarified by addressing the different use they make of the genealogical method. While Fricker’s genealogy of (...) Testimonial Justice aims to ground her claim that reason and power can be neatly pulled apart, thus avoiding the reductionist and relativist conclusions entailed by Foucault’s genealogies, I argue that Foucault’s mature, overlooked definition of genealogy is based on a sophisticated distinction between games and regimes of truth, and is thus not vulnerable to these criticisms. Consequently, Foucault’s genealogical inquiries prove helpful for understanding issues that normally fall under the umbrella of epistemic injustice in a new light, while also allowing us to avoid some of the main objections that threaten Fricker’s project. (shrink)

Cosmopolitics, the concept of a world politics based on shared democratic values, is in an increasingly fragile state.

Daniele Botti argues that John Rawls’s philosophy is importantly connected with classical American pragmatism and that Rawls’s intellectual trajectory did not take a “pragmatic turn” in the 1980s but possibly an “un-pragmatic” one. Both claims go against conventional wisdom, and Botti corroborates them with archival research.

This paper presents an enrichment of the Gabbay–Woods schema of Peirce’s 1903 logical form of abduction with illocutionary acts, drawing from logic for pragmatics and its resources to model justified assertions. It analyses the enriched schema and puts it into the perspective of Peirce’s logic and philosophy.

This paper presents a new interpretation of Michel Foucault’s critical project. It is well known that Foucault’s genealogical critique does not focus on issues of justification, but instead tackles “aspectival captivity,” that is, apparently inevitable limits of thought that constrain the agent’s freedom but that, in fact, can be transformed. However, it has not been recognized that, according to Foucault, critique can proceed along two distinct paths. In a key passage of “What Is Critique?,” Foucault states that critique is tasked (...) with questioning truth about its effects of power and with questioning power about its discourses of truth. We show that this “double movement” organizes Foucault’s critical project as a whole, giving it a significantly wider scope and a more complex structure than has been previously acknowledged. At the heart of the above-mentioned bifurcation lies an apparent tension between two contrastive roles Foucault assigns to truth-telling in the context of critique: on the one hand, truth-telling (as avowal) is a target of critique; on the other, truth-telling (as parrhesia) is one of critique’s methods. We argue that combining these two dimensions in a unified account is crucial for understanding and re-evaluating Foucault’s critical project as a whole. By showing that truth-telling remains an essential element of Foucauldian critique, this paper also rectifies some influential misinterpretations according to which Foucault’s critical project seeks to eliminate truth from the picture. (shrink)

Philosophical analysis of mathematical knowledge are commonly conducted within the realist/antirealist dichotomy. Nevertheless, philosophers working within this dichotomy pay little attention to the way in which mathematics evolves and structures itself. Focusing on mathematical practice, I propose a weak notion of objectivity of mathematical knowledge that preserves the intersubjective character of mathematical knowledge but does not bear on a view of mathematics as a body of mind-independent necessary truths. Furthermore, I show how that the successful application of mathematics in science (...) is an important trigger for the objectivity of mathematical knowledge. (shrink)

Chang's MV algebras are the algebras of the infinite-valued sentential calculus of ukasiewicz. We introduce finitely additive measures (called states) on MV algebras with the intent of capturing the notion of average degree of truth of a proposition. Since Boolean algebras coincide with idempotent MV algebras, states yield a generalization of finitely additive measures. Since MV algebras stand to Boolean algebras as AFC*-algebras stand to commutative AFC*-algebras, states are naturally related to noncommutativeC*-algebraic measures.

In this paper, I argue that the appropriate answer to the question of the form contemporary neoliberalism gives our lives rests on Michel Foucault’s definition of neoliberalism as a particular art of governing human beings. I claim that Foucault’s definition consists in three components: neoliberalism as a set of technologies structuring the ‘milieu’ of individuals in order to obtain specific effects from their behavior; neoliberalism as a governmental rationality transforming individual freedom into the very instrument through which individuals are directed; (...) and neoliberalism as a set of political strategies that constitute a specific, and eminently governable, form of subjectivity. I conclude by emphasising the importance that Foucault’s work on neoliberalism as well as the ancient ‘ethics of the care of the self’ still holds for us today. (shrink)

Normative powers like promising allow agents to effect changes to their reasons, permissions and rights by the means of communicative actions whose function is to effect just those changes. An attractive view of the normativity of such powers combines a non-reductive account of their bindingness with a value-based grounding story of why we have them. This value-based view of normative powers however invites a charge of wishful thinking: Is it not bad reasoning to think that we have a given power (...) because it would be good? In this article, I offer a defence of the value-based view of normative powers against this surprisingly under-discussed objection. First, I clarify the challenge by distinguishing between two components of normative powers, which I call the material and normative components, respectively. Secondly, I defend the form of normative explanation involved, showing that it is needed to give convincing value-based explanations for other important normative phenomena, especially rights of autonomy. (shrink)

On the classical understanding, an agent is fully excused for an action if and only if performing this action was a case of faultless wrongdoing. A major motivation for this view is the apparent existence of paradigmatic types of excusing considerations, affecting fault but not wrongness. I show that three such considerations, ignorance, duress and compulsion, can be shown to have direct bearing on the permissibility of actions. The appeal to distinctly identifiable excusing considerations thus does not stand up to (...) closer scrutiny, undermining the classical view and giving us reason to seek alternative ways of drawing the justification/excuse distinction. (shrink)

In this paper, we present a number of problems for intellectualism about knowledge-how, and in particular for the version of the view developed by Stanley & Williamson 2001. Their argument draws on the alleged uniformity of 'know how'-and 'know wh'-ascriptions. We offer a series of considerations to the effect that this assimilation is problematic. Firstly, in contrast to 'know wh'-ascriptions, 'know how'-ascriptions with known negative answers are false. Secondly, knowledge-how obeys closure principles whose counterparts fail for knowledge-wh and knowledge-that. Thirdly, (...) as opposed to knowledge-wh and knowledge-that, knowledge-how is inferentially isolated from further knowledge-that. We close by providing some evidence against the further reduction of knowledge-wh to knowledge-that, which is presupposed by the intellectualist theory under discussion. (shrink)

In this article I reconstruct the philosophical conditions for the emergence of the notion of counter-conduct within the framework of Michel Foucault’s study of governmentality, and I explore the reasons for its disappearance after 1978. In particular, I argue that the concept of conduct becomes crucial for Foucault in order to redefine governmental power relations as specific ways to conduct the conduct of individuals: it is initially within this context that, in Security, Territory, Population, he rethinks the problem of resistance (...) in terms of counter-conduct. However, a few months later, in What is Critique?, Foucault (implicitly) replaces the notion of counter-conduct with that of critical attitude, defined as the particular form that counter-conduct takes in modern times. This notion allows him to highlight the role played by the will (to be or not to be governed like that) in resistance to governmental strategies. But since the notion of counter-conduct is conceptually wider than that of critical attitude, I suggest in conclusion that it could be worth reactivating it as a “historical category which, in various forms and with diverse objectives, runs through the whole of Western history.”. (shrink)

This articles explores the mereological foundation of truthmaker semantics. Building upon Kit Fine’s abstract theory of part in [16], we engage in an exploration of the mereological assumptions that determine the construction of truthmaker semantics. Our approach yields semantics for a diverse range of logics, including substructural logics such as the associative Lambek calculus, as well as the logics of analytic containment. Furthermore, we elucidate the philosophical implications that arise from this pioneering approach.

Are there really beliefs? Or are we learning (from neuroscience and psychology, presumably) that, strictly speaking, beliefs are figments of our imagination, items in a superceded ontology? Philosophers generally regard such ontological questions as admitting just two possible answers: either beliefs exist or they don't. There is no such state as quasi-existence; there are no stable doctrines of semi-realism. Beliefs must either be vindicated along with the viruses or banished along with the banshees. A bracing conviction prevails, then, to the (...) effect that when it comes to beliefs (and other mental items) one must be either a realist or an eliminative materialist. (shrink)

The beliefs involved in the placebo effect are often assumed to be self-fulfilling, that is, the truth of these beliefs would merely require the patient to hold them. Such a view is commonly shared in epistemology. Many epistemologists focused, in fact, on the self-fulfilling nature of these beliefs, which have been investigated because they raise some important counterexamples to Nozick’s “tracking theory of knowledge.” We challenge the self-fulfilling nature of placebo-based beliefs in multi-agent contexts, analyzing their deep epistemological nature and (...) the role of higher-order beliefs involved in the placebo effect. (shrink)

This paper explores the intertwining of uncertainty and values. We consider an important but underexplored field of fundamental uncertainty and values in decision-making. Some proposed methodologies to deal with fundamental uncertainty have included potential surprise theory, scenario planning and hypothetical retrospection. We focus on the principle of uncertainty transduction in hypothetical retrospection as an illustrative case of how values interact with fundamental uncertainty. We show that while uncertainty transduction appears intuitive in decision contexts it nevertheless fails in important ranges of (...) strategic game-theoretic cases. The methodological reasons behind the failure are then examined. (shrink)

In this paper, I argue that a serious philosophical investigation of the domain of the perlocutionary is both possible and desirable, and I show that it possesses a distinctively moral dimension that has so far been overlooked. I start, in Section II, by offering an original characterisation of the distinction between the illocutionary and the perlocutionary derived from the degree of predictability and stability that differentiates their respective effects. In Section III, I argue that, in order to grasp the specificity (...) of the perlocutionary, we must focus on the total speech situation, which I define as conversation. Then, in Section IV, I show that an investigation of the domain of the perlocutionary requires us to draw a conceptual distinction between recognition and acknowledgment. This distinction proves to be crucial, because the success of perlocutions normally depends on something more than what Austin calls the ‘securing of uptake’: the reciprocity condition for illocutions needs to be supplemented, in the case of perlocutions, with an analysis of what I call the ‘grammar of acknowledgment.’ Lastly, in Section V, I elaborate the notion of ‘perlocutionary responsibility,’ a specific form of moral responsibility for the consequences of utterances that are not (entirely) predictable. (shrink)

Graham Priest proposed an argument for the conclusion that ‘nothing’ occurs as a singular term and not as a quantifier in a sentence like (1) ‘The cosmos came into existence out of nothing’. Priest's point is that, intuitively, (1) entails (C) ‘The cosmos came into existence at some time’, but this entailment relation is left unexplained if ‘nothing’ is treated as a quantifier. If Priest is right, the paradoxical notion of an object that is nothing plays a role in our (...) very understanding of reality. In this note, we argue that Priest's argument is unsound: the intuitive entailment relation between (1) and (C) does not offer convincing evidence that ‘nothing’ occurs as a term in (1). Moreover, we provide an explanation of why (1) is naturally taken to entail (C), which is both plausible and consistent with the standard, quantificational treatment of ‘nothing’. (shrink)

This book offers a philosophically-based, yet clinically-oriented perspective on current medical reasoning aiming at 1) identifying important forms of uncertainty permeating current clinical reasoning and practice 2) promoting the application of an abductive methodology in the health context in order to deal with those clinical uncertainties 3) bridging the gap between biomedical knowledge, clinical practice, and research and values in both clinical and philosophical literature. With a clear philosophical emphasis, the book investigates themes lying at the border between several disciplines, (...) such as medicine, nursing, logic, epistemology, and philosophy of science; but also ethics, epidemiology, and statistics. At the same time, it critically discusses and compares several professional approaches to clinical practice such as the one of medical doctors, nurses and other clinical practitioners, showing the need for developing a unified framework of reasoning, which merges methods and resources from many different clinical but also non-clinical disciplines. In particular, this book shows how to leverage nursing knowledge and practice, which has been considerably neglected so far, to further shape the interdisciplinary nature of clinical reasoning. Furthermore, a thorough philosophical investigation on the values involved in health care is provided, based on both the clinical and philosophical literature. The book concludes by proposing an integrative approach to health and disease going beyond the so-called “classical biomedical model of care”. (shrink)

This paper develops two theses and one suggestion. The first thesis concerns how to reason about the problem of philosophical progress. Chalmers (2015) and Dellsén et al. (2022) proposed frameworks to reason about this problem. I argue that these frameworks have limits and develop an alternative. Having done this, I put my proposed framework to the test. That is, I use it to analyse the views held by Kant in the first critique and Wittgenstein in the Tractatus. The second thesis (...) concerns the relations between these works. My proposed framework makes evident that, for all their differences, Kant and Wittgenstein gave similar answers to the problem of philosophical progress. They both claimed that philosophy has been very unproductive for much of its history and proposed methods to fix this. My suggestion is that this might be a recurring pattern in the history of philosophy, which perhaps could help explain why, to this day, there is so much pessimism concerning philosophical progress. (shrink)

We attempt to justify the use of synthetic biology in response to the climate crisis, based on the premise that it is impossible to avert runaway climate change without sequestering sufficient greenhouse gases (GHG), which could only become possible through Negative Emissions Technologies (NETs). Then, moving from a consequentialist standpoint, we acquiesce to how the consequences of using NETs through synthetic biology are preferable to the catastrophic consequences of runaway climate change. In conclusion, we show how our analysis of synthetic (...) biology resonates with a zoecentric view of climate science and ethics. (shrink)

We scan Paul K. Feyerabend's work in philosophy of physics and of science more generally for insights that could be useful for the contemporary debate on the foundations of quantum mechanics. We take as our starting point what Feyerabend has actually written about quantum mechanics, but we extend our analysis to his general views on realism, objectivity, pluralism, and the relation between physics and philosophy, finding that these more general views could in fact offer many interesting insights for physicists and (...) philosophers working on quantum foundations. (shrink)

Whistleblowing is the act of disclosing information from a public or private organization in order to reveal cases of corruption that are of immediate or potential danger to the public. Blowing the whistle involves personal risk, especially when legal protection is absent, and charges of betrayal, which often come in the form of legal prosecution under treason laws. In this article we argue that whistleblowing is justified when disclosures are made with the proper intent and fulfill specific communicative constraints in (...) addressing issues of public interest. Three communicative constraints of informativeness, truthfulness and evidence are discussed in this regard. We develop a ‘harm test’ to assess the intent for disclosures, concluding that it is not sufficient for justification. Along with the proper intent, a successful act of whistleblowing should provide information that serves the public interest. Taking cognizance of the varied conceptions of public interest, we present an account of public interest that fits the framework of whistleblowing disclosures. In particular, we argue that whistleblowing is justified inter alia when the information it conveys is of a presumptive interest for a public insofar as it reveals an instance of injustice or violation of a civil or political right done against and unbeknown to some members of a polity. (shrink)

In this paper I shall adopt a possible reading of the notions of ‘explanatory indispensability’ and ‘genuine mathematical explanation in science’ on which the Enhanced Indispensability Argument proposed by Alan Baker is based. Furthermore, I shall propose two examples of mathematical explanation in science and I shall show that, whether the EIA-partisans accept the reading I suggest, they are easily caught in a dilemma. To escape this dilemma they need to adopt some account of explanation and offer a plausible answer (...) to the following ‘question of evidence’: What is a genuine mathematical explanation in empirical science and on what basis do we consider it as such? Finally, I shall suggest how a possible answer to the question of evidence might be given through a specific account of mathematical explanation in science. Nevertheless, the price of adopting this standpoint is that the genuineness of mathematical explanations of scientific facts turns out to be dependent on pragmatic constraints and therefore cannot be plugged in EIA and used to establish existential claims about mathematical objects. (shrink)

Lowe claims that having knowledge of the essence of an object is a precondition for thinking about it. Lowe supports this claim with roughly the following argument: you cannot think about something unless you know what you are thinking about; and to know what it is that you are thinking about just is to know its essence. I will argue that this line of reasoning fails because of an equivocation in the expression ‘what a thing is’, which can be used (...) to indicate the essence of the thing but also, more commonly, some description of that thing which is useful in the context to identify it. I will then consider some possible variations of the argument, both in its premises and in its conclusion, and I will argue that they either fail to produce a sound argument or they weaken the conclusion too much to preserve the philosophical interest of the result. (shrink)

The paper proposes two logical analyses of (the norms of) justification. In a first, realist-minded case, truth is logically independent from justification and leads to a pragmatic logic LP including two epistemic and pragmatic operators, namely, assertion and hypothesis. In a second, antirealist-minded case, truth is not logically independent from justification and results in two logical systems of information and justification: AR4 and AR4¢, respectively, provided with a question-answer semantics. The latter proposes many more epistemic agents, each corresponding to a (...) wide variety of epistemic norms. After comparing the different norms of justification involved in these logical systems, two hexagons expressing Aristotelian relations of opposition will be gathered in order to clarify how (a fragment of) pragmatic formulas can be interpreted in a fuzzy-based question-answer semantics. (shrink)

This paper addresses Frege's discussion of illogical thought in the introduction to Basic Laws of Arithmetic. After a brief introduction, I discuss Frege's claims that logic is normative vis-à-vis thought, and not descriptive, and his opposition to the idea that logical laws express psychological necessities. I argue that these two strands of Frege's polemic against psychologism constitute two motivating factors behind his allowing for the possibility of illogical thought. I then explore a line of thought—originally advanced by Joan Weiner—according to (...) which Frege should have rejected illogical thought as not constituting a genuine possibility. I argue that, once developed, this line of thought constitutes an important correction (moreover, one that is consistent with his two aforementioned anti-psychologistic strands) to Frege's own response to the possibility of illogical thought. -/- . (shrink)