Some feminist discourses blame some men for gender inequality, gender domination, and gender-based violence. Some women use such discourse as a perfect scenario to criticize some men’s behavior. Indeed, they usually do so with Oppressed Traditional Masculinities but not with Dominant Traditional Masculinities, who are the men who were violent with those women and with whom some of those women chose to have relationships. However, there have always been men who have been on the side of women and have never (...) committed violence against them. Therefore, New Alternative Masculinities reject being indicated as guilty of the violence committed against women by DTM. Through a communicative approach, applying six semi-structured interviews with a communicative orientation and a communicative data analysis of all information, this article explores both women’s communicative acts that blame OTM for what DTM have done to women and NAM’s reactions to these accusations to stop such blaming to make it possible to overcome hegemonic discourses. (shrink)

Ciencias sociales : saberes coloniales y eurocéntricos / Edgardo Lander / - Europa modernidad y eurocentrismo / Enrique Dussel / - La colonialidad a lo largo y a lo ancho : el hemisferio occidental en el horizonte colonial de la modernidad / Walter D. Mignolo / - Naturaleza del poscolonialismo : del eurocentrismo al globocentrismo / Fernando Coronil / - El lugar de la naturaleza y la naturaleza del lugar : ¿globalización o postdesarrollo? / Arturo Escobar / - Ciencias sociales, (...) violencia epistémica y el problema de la invención del otro / Santiago Castro-Gómez / - Superar la exclusión, conquistar la equidad : reformas, políticas y capacidades en el ámbito social / Alejandro Moreno / - Abrir, impensar, y redimesionar las ciencias sociales en América Latina y el Caribe. ¿Es posible una ciencia social no eurocéntrica en nuestra región? / Francisco López Segrera / - Colonialidad del poder, eurocentrismo y América Latina / Aníbal Quijano. (shrink)

The debate regarding the nature of joint action has come to a stalemate due to a dependence on intuitional methods. Normativists, such as Margaret Gilbert, argue that action-relative normative relations are inherent in joint action, while non-normativists, such as Michael Bratman, claim that there are minimal cases of joint action without normative relations. In this work, we describe the first experimental examinations of these intuitions, and report the results of six studies that weigh in favor of the normativist paradigm. Philosophical (...) ramifications and further extensions of this work are then discussed. (shrink)

Did industry and commerce affect the concepts, values and epistemic foundations of different sciences? If so, how and to what extent? This book suggests that the most significant influence of industry on science in the two case studies treated here had to do with the issue of realism. However, what led physicists and engineers to adopt realist attitudes? This book suggests that a new kind of realism --a realism of social and cultural origins- is the answer. The book has two (...) parts: while Part I focuses on the study of the ionosphere and how the British radio industry affected ionospheric physics, Part II focuses on the study of the Earth's crust and how the American oil industry affected crustal seismology. (shrink)

Communication campaigns often highlight environmental progress to encourage further pro-environmental behaviour. Consequently, the drop in carbon emissions caused by the COVID-19 restrictions has been framed as a positive environmental outcome of the pandemic. We conducted an experimental study with a US-representative sample (N = 500) to show that raising awareness of emissions reduction has the contrary effect: an increase in moral self-concept facilitated a negative spillover, namely, it reduced climate-friendly behavioural intentions. Normative influence was able to prevent this negative spillover (...) because activating environmental norms inhibited compensatory feelings. Besides, awareness of recent emissions reduction was less likely to increase the moral self-concept of participants with a strong environmental self-identity. Our findings demonstrate that environmental progress increases moral self-concept which, in turn, could cause a negative spillover (i.e., reduce climate-friendly low-carbon behaviour and increase climate-harmful high-carbon behaviour). Normative influences and environmental self-identity can inhibit this negative spillover. (shrink)

This paper uses the tools of experimental philosophy to examine the nature of interpersonal normativity in collective action, focusing on cases of immoral collective action and collective action by friends. The results of our two studies, which expand on recent empirical interventions into longstanding debates in social ontology, demonstrate that according to our everyday judgments there are interpersonal obligations in cases of collective action, even when immoral, and that, while friendship elicits judgments of togetherness, it does not affect the norms (...) of collective action. We also situate these results in the philosophical literature and discuss their consequences for a “pluralism” about sociality. (shrink)

Mirativity is a grammatical category or a linguistic strategy that makes explicit the surprising aspect of a piece of information. Different mirativity strategies appear in different languages. Evidentiality is a grammatical category that explicitly expresses the source of information, i.e. if something has been seen, heard or inferred. Whether mirativity forms part of evidentiality is an open question. An agent makes use of a mirativity marker when she or he expresses something about a surprising fact with respect to her or (...) his background knowledge. But there are different kinds of mirativity markers. Some of them are simple and direct and others, more complex, involve inferential processes. Here, we focus on complex mirativity and we compare it with inferred evidentials and deferred realizations. Our proposal goes beyond the purely linguistic analysis, since we try to interpret mirativity, and its role in interaction, as forming part of or involving a particular kind of inference, namely abduction. Mirativity can be used to express the surprising state that triggers an abductive reasoning but it can also encapsulate its result in such a way that it can be understood in relation to evidentiality. Thus, at least in some cases of complex mirativity, mirativity may convey indication about the source of information. Interesting for studies on dialogue is that they also indicate the degree of commitment of the speakers with the content of their own utterances. (shrink)

In this papper, we will do a travel to the history about Movimiento 19 de Abril, a Colombian guerrilla, and one of their units: the Batallón América. This army was conformed for four groups: M-19 and Movimiento Armado Quintín Lame, Alfaro Vive Carajo, and Movimiento Revolucionario Túpac Amaru. This battalion was a perfect example about the relation of M-19 with national and international guerrillas, and the Socialist International. Across this paper, we will show a primal idea about the internationalism in (...) the Latin American guerrillas, its effects in the posterior history from these guerrillas, the important paper from the Batallón América in their strategy about the cooperation between guerrillas in Colombia and the creation of a transnational revolutionary army in the Latin American continent. (shrink)

Let ‘semantic relevance’ be the thesis that the wide semantic properties of representational mental states (like beliefs and desires) are causally relevant to behavior. A popular way of arguing for semantic relevance runs as follows: start with a sufficient counterfactual condition for causal or explanatory relevance, and show that wide semantic properties meet it with respect to behavior (e.g., Loewer & Lepore (1987,1989), Rescorla (2014), Yablo (2003)).This paper discusses an in‐principle limitation of this strategy: even the most sophisticated counterfactual criteria (...) systematically misclassify irrelevant properties as relevant when they stand in certain kinds of modal co‐variation or ‘entanglement’ relations to genuinely relevant properties. This entanglement problem, I argue, is more general and more serious than proponents of the counterfactual strategy have recognized: it threatens recent interventionist arguments for semantic relevance, and is not easily solved by appeal to proportionality or naturalness. I end by suggesting that proponents of semantic relevance may need to shift their attention from patterns of counterfactuals to the lawful psychological generalizations that explain them. (shrink)

Nuestro frenesí de comunicación e información hace que las cosas des- aparezcan y devengan en no-cosas, también llamadas informaciones (Han, 2021: 10). El marco ontológico presente es resultado de un desplazamiento que va del ocaso de las cosas al consumo rápido y frenético de no-cosas. En este entorno intangible el ser humano ya no maneja ninguna cosa. Las no cosas son aquellas cosas puramente intangibles, que no pueden aprehenderse con las manos. Lo único que le queda de las manos al (...) ser humano que habita este entorno son las yemas de los dedos con las que presiona las teclas para jugar con símbolos (Flusser, 2002: 107). ¿Qué efectos contrae este nuevo paradigma vital en el campo de la educación? ¿Qué significa educar en y trabajar con no-cosas? (shrink)

The presentation of the “dual picture of vagueness” in my earlier work is supplemented here with a number of additional considerations. I emphasize how the picture lends itself naturally to treatments of the contribution of a typical degree adjective to propositional content and to truth conditions. A number of reasonable refinements of the picture are presented, especially concerning occasions of use of a degree adjective in which a class containing a sorites series is somehow involved in content fixing, but in (...) such a way that an extension ultimately gets fixed for the predicate. I also develop the observation that standard theories of the logical and semantic paradoxes rely on the idea that the content-fixing mechanisms for the paradoxical expressions work well in general but fail in some localized cases, and that while standard theories of the sorites paradox are clearly not based on this idea at all, the dual theory is fully based on the idea. Next, I offer a few remarks on some recent theories of vagueness and the sorites that are broadly in the spirit of the dual picture, emphasizing the aspects where the latter compares favorably against those recent theories. Finally, the question whether the dual theory is statable with truth according to the theory itself is considered in more detail than in my earlier presentation. (shrink)

Tarski implicitly postulated that a certain pre-theoretical concept of logical consequence and his technical concept of logical consequence are co-extensional. This chapter makes explicit a few theses about logical consequence or logical truth that sound Tarskian somehow, including one that most deserves the name ‘Tarski's Thesis’. Some of these theses are probably true or close to true but weaker than Tarski's. Some are false but stronger than Tarski's. Tarski's Thesis plausibly postulated that a sentence of a classical language possibly extended (...) with non-traditional extensional logical constants is logically true, if it is true in all classical interpretations of all its non-logical constants. But it is noted that this thesis turns out to be false on most conceptions of logical truth, for some sentences of a classical language extended with extensional logical constants are true in all classical interpretations of all its non-logical constants, but are not necessary. (shrink)

En este artículo pretendo reflexionar sobre una cuestión de gran trascendencia para el pensamiento histórico y filosófico de comienzos del siglo XXI: el lugar que ocupan las víctimas y su sufrimiento en una reconsideración epistemológica de las ciencias sociales, del pensamiento humanista y de la propia disciplina historiográfica. Para ello, mi idea es seguir los argumentos de dos textos de Hayden White, que considero imprescindibles para estudiar su pensamiento ético-moral: “El posmodernismo y las ansiedades textuales” y “El acontecimiento modernista”. Por (...) supuesto, acompañaré mis argumentos con una lectura transversal de The Practical Past, última obra publicada por el historiador USAmericano. Y todo ello con la intención de elaborar un homenaje a la vida y a la obra de un autor que tanto ha hecho por situar en el centro del debate sobre el pasado las cuestiones más puramente políticas y éticas, además de las teóricas o metodológicas. This text offers a reflection on a question of great importance for the historical-philosophical thought of the beginning of the 21st Century: the place occupied by the victims and their suffering in an epistemological reconsideration of the social sciences, of humanist thought and of the historiographic discipline itself. For doing this, this article offers an analysis of Hayden White’s oeuvre, a work that grants a transcendental role to the collective memories of the victims, as well as to their suffering. And all this with a critical and ethical-political intention, essential for scientific and social progress. (shrink)

Working memory is a foundational construct of cognitive psychology, where it is thought to be a capacity that enables us to keep information in mind and to use that information to support goal directed behavior. Philosophers have recently employed working memory to explain central cognitive processes, from consciousness to reasoning. In this paper, I show that working memory cannot meet even a minimal account of natural kindhood, as the functions of maintenance and manipulation of information that tie working memory models (...) and theories together do not have a coherent or univocal realizer in the brain. As such, working memory cannot explain central cognition. Rather, I argue that working memory merely redescribes its target phenomenon, and in doing so it obfuscates relevant distinctions amongst the many ways that brains like ours retain and transform information in the service of cognition. While this project ultimately erodes the explanatory role that working memory has played in our understanding of cognition, it simultaneously prompts us to evaluate the function of natural kinds within cognitive science, and signals the need for a productive pessimism to frame our future study of cognitive categories. (shrink)

El presente artículo describe un proyecto de innovación educativa de aprendizaje de competencias, realizado en el Curso Propio de Liderazgo de la Universidad San Pablo CEU, transversal a toda su oferta educativa. Se trata de nuevo proyecto basa- do en una docencia híbrida, donde las masterclass más teóricas se han complemen- tado con un aprendizaje basado en retos vinculados a materias de comunicación y sostenibilidad, aplicando la metodología Design Sprint. De esta forma, se consigue formar al alumno en las llamadas (...) habilidades blandas, cada vez más demandadas por el entorno laboral. (shrink)

Frost's article advocates for universal models of reading and critiques recent models that concentrate in what has been described as “cracking the orthographic code.” Although the challenge to develop models that can account for word recognition beyond Indo-European languages is welcomed, we argue that reading models should also be constrained by general principles of visual processing and object recognition.

El texto “¿Qué es la Ilustración?” de 1984 señala en Foucault un punto de inflexión en la manera de leer la obra de Kant. Nuestra propuesta consiste en realizar una aproximación a ese texto tomando como punto de partida los trabajos sobre la parrhesía del pensador francés. De esta manera, la Ilustración aparece bajo una nueva luz que ya no sería la que nos muestra sus oscuras invenciones o los límites de su propio pensamiento; tampoco sería solamente el punto de (...) aparición de una actitud crítica cuya radicalidad iría más allá de la crítica kantiana. Tomando como marco más general el estudio de la parrhesía, la Ilustración reaparece ahora como coraje de la verdad y nos muestra a Kant como un parresiasta, como aquel que dice la verdad. Dicho en otros términos, la “actitud crítica” se reformula como un decir veraz valeroso. (shrink)

Quadruple Helix Collaborations (QHCs) is a cooperation model in which industry, government, academia, and the public interact to innovate. This paper analyses the impact of a training intervention to provide specific knowledge, skills, and attitudes to deal with barriers commonly found in the progress of QHCs. We designed, implemented, and evaluated three training programs in Austrian, Colombian, Danish, and Spanish institutions. We analysed trainees’ (n = 66) and trainers’ (n = 9) perceptions to identify the competencies acquired with the intervention (...) and the approach’s limitations. We used online questionnaires (35 trainees; 9 trainers), semi-structured interviews (10 trainees), and a focus group (6 trainers). Trainees answered positively regarding their self-perception about the impact of the course and highlighted the acquisition of inspiration for their practice (score 4.1 out of 5.0) and knowledge (3.7). In contrast, they perceived that a deeper interaction with other participants (2.7) was challenging. After the courses, 74% of respondents indicated that they know more about how QHCs work in practice, and 86% about collaboration or engagement methods. Moreover, participants plan to be more sensitive towards setting common goals (71%) and power imbalances (63%). Trainers’ perceptions align with those expressed by participants, except that they considered that the interaction amongst participants during the course was higher. Qualitative analysis of interviews with participants and the focus group with trainers provides more detail about the strengths and weaknesses of the intervention. Our study shows that the collaborative design and implementation of training impact the participant’s learning competencies, with potential implications in their medium- to long-term practice. (shrink)

In their target article, Lynch, Parke, and O’Malley argue against the quick application of causal, interventionist explanatory frameworks to microbiomes and their purported role in many disparate states, from obesity to anxiety. I think the authors have undersold the force of their argument. A careful consideration of the scope of their claims, made easier by a parallel drawn from the history of explanation in neuroscience, yields a productive pessimism: that causal explanations likely operate at the wrong level of analysis for (...) dynamic, distributed, Quineian entities like the microbiome. That is, we shouldn’t expect causal explanations for microbiomes at all—and this includes the authors’ own “microbiome success story” of C. difficile. Neuroscience, with its own computationally challenging, dynamic entity—the brain—may provide lessons for how to approach something like predictive control over the microbiome. (shrink)

Exposición de algunas teorías de la auto-organización en el paradigma de la orden a través del desorden. Se analizan las crisis y las catastrofes por su valor auto-organizador en la formación de comportamientos colectivos.

The Covid-19 pandemic disrupted in-person dispute resolution proceedings, leading to the rapid adoption of digital technologies for remote hearings in international arbitration. The use of these technologies has opened up new possibilities for enhancing procedures, improving efficiency, and streamlining processes. However, it also raises concerns about transparency and authenticity in virtual hearings. This paper explores the impact of digital technologies on the semiotics of law and legal communication in international arbitration, considering the intersections between new technologies and persuasion. Based on (...) practices like the use of e-evidence, debates surrounding remote hearings, and the formulation of standards for stakeholders’ behavior, the study takes a practice-based approach, exploring cognitive processes, such as memory and attention, and their influence on the behavior of counsel, arbitrators, and witnesses in remote hearings. It highlights the key issues, findings, challenges, and future research opportunities arising from the introduction of digital technologies in this field, including considerations on how stakeholders of a virtual hearings are affected by the unique features of the digital environment. (shrink)

The present study focuses on a grammatical category called evidentiality. The primary meaning of evidentiality is concerned with information source. That is, it expresses whether something has been seen, heard or inferred. The aim here is to conduct a conceptual study of evidentiality in which use is made of formal tools. The fundamental intuition is that the distinction between ‘evidence’as ‘proof’and ‘evidentiality’as ‘to do with proof’is a crucial one. Evidentiality is a dynamic notion to be analysed through the use of (...) knowledge by the agents, a knowledge in action, which involves an in-coming state and an out-coming state that is typical of the transmission of information. We propose our own approach in which the dynamics of knowledge in action is grasped in the context of a dynamic epistemic logic. (shrink)

The objectives of this article are (i) to identify the most challenging ethical dilemmas and questions arising from the experiences of communities and professionals affected by or involved in volcanic eruptions, including risk management, the dissemination of information, and tourism; and (ii) to provide arguments for intercultural ethics to address these dilemmas. Intercultural ethics provide invaluable resources to disaster ethics across all three phases of the complete disaster management cycle. In this article, intercultural ethics is viewed as an ethics grounded (...) in ongoing dialogue, facilitating the examination and establishment of norms and a critical reflection on values and their evolution. This approach recognizes power dynamics that may influence fair participation in dialogues and aims to address them, while also integrating elements of deliberative ethics to ensure that dialogues genuinely contribute to legitimizing decisions. Intercultural sensibility helps bridge the gap between experts and non-experts in both directions (a) by emphasizing the duty of transferring scientific knowledge (for experts) and the responsibility of acquiring scientific literacy (for citizens); and (b) by highlighting the importance of a ‘knowledge dialogue’ that acknowledges the non-scientific knowledge of citizens, rooted in their cultural background and experiences of dealing with past disasters, and shaping life in volcanic territories. (shrink)

BackgroundThis article aims to contribute to a better conceptualization of pain and suffering by providing non-essential and non-naturalistic definitions of both phenomena. Contributions of classical evidence-based medicine, the humanistic turn in medicine, as well as the phenomenology and narrative theories of suffering and pain, together with certain conceptions of the person beyond them are critically discussed with such purpose.MethodsA philosophical methodology is used, based on the review of existent literature on the topic and the argumentation in favor of what are (...) found as better definitions of suffering and pain.ResultsPain can be described in neurological terms but cognitive awareness, interpretation, behavioral dispositions, as well as cultural and educational factors have a decisive influence on pain perception. Suffering is proposed to be defined as an unpleasant or even anguishing experience, severely affecting a person at a psychophysical and existential level. Pain and suffering are considered unpleasant. However, the provided definitions neither include the idea that pain and suffering can attack and even destroy the self nor the idea that they can constructively expand the self; both perspectives can b e equally useful for managing pain and suffering, but they are not defining features of the same. Including the existential dimension in the definition of suffering highlights the relevance of suffering in life and its effect on one’s own attachment to the world. An understanding of pain and suffering life experiences is proposed, meaning that they are considered aspects of a person’s life, and the self is the ever-changing sum of these experiences.ConclusionsThe provided definitions will be useful to the identification of pain and suffering, to the discussion of how to relieve them, and to a better understanding of how they are expressed and experienced. They lay the groundwork for further research in all these areas, with the twofold aim of a) avoiding epistemological mistakes and moral injustices, and b) highlighting the limitations of medicine in the treatment of suffering and pain. (shrink)

To what extent do aesthetic taste and our interest in the arts constitute who we are? In this paper, we present a series of empirical findings that suggest an Aesthetic Self Effect supporting the claim that our aesthetic engagements are a central component of our identity. Counterfactual changes in aesthetic preferences, for example, moving from liking classical music to liking pop, are perceived as altering us as a person. The Aesthetic Self Effect is as strong as the impact of moral (...) changes, such as altering political partisanship or religious orientation, and significantly stronger than for other categories of taste, such as food preferences. Using a multidimensional scaling technique to map perceived aesthetic similarities among musical genres, we determined that aesthetic distances between genres correlate highly with the perceived difference in identity. Further studies generalize the Aesthetic Self Effect beyond the musical domain: general changes in visual art preferences, for example from more traditional to abstract art, also elicited a strong Self Effect. Exploring the breadth of this effect we also found an Anaesthetic Self Effect. That is, hypothetical changes from aesthetic indifference to caring about music, art, or beauty are judged to have a significant impact on identity. This effect on identity is stronger for aesthetic fields compared to leisure activities, such as hiking or playing video games. Across our studies, the Anaesthetic Self Effect turns out to be stronger than the Aesthetic Self Effect. Taken together, we found evidence for a link between aesthetics and identity: we are aesthetic selves. When our tastes in music and the arts or our aesthetic interests change we take these to be transformative changes. (shrink)

En este capítulo se estudia la facultad a prevención contenida en la Ley 1333 de 2009, para analizar la forma en la que el derecho ambiental ha venido construyendo una dogmática y reglas propias, escapando de la tradición del derecho administrativo, así como creando la dogmática propia necesaria para lograr su independencia y consolidación como un área autónoma de la disciplina jurídica. Al respecto, en este ejercicio de reflexión es posible ver cómo la figura aparte de estar diseñada por fuera (...) de la teoría general del acto administrativo, también posee particularidades que la hacen única dentro del ordenamiento jurídico colombiano. (shrink)

Diseases of complex origin have a component of quantitative genetics that contributes to their susceptibility and phenotypic variability. However, after several studies, a major part of the genetic component of complex phenotypes has still not been found, a situation known as “missing heritability.” Although there have been many hypotheses put forward to explain the reasons for the missing heritability, its definitive causes remain unknown. Complex diseases are caused by multiple intermediate phenotypes involved in their pathogenesis and, very often, each one (...) of these intermediate phenotypes also has a component of quantitative inheritance. Here we propose that at least part of the missing heritability can be explained by the genetic component of intermediate phenotypes that is not detectable at the level of the main complex trait. At the same time, the identification of the genetic component of intermediate phenotypes provides an opportunity to identify part of the missing heritability of complex diseases. (shrink)

El género del evan- gelio de Marcos sigue siendo un problema abierto con varias solu- ciones propuestas, pero está lejos de encontrar un consenso. Este artículo presenta la importancia de tener en cuenta el estudio sobre los géneros literarios realizados por la lingüística en la actualidad, después del estancamiento de los estudios literarios sobre los mis - mos. Estas perspectivas lingüísti- cas sobre el género se aplican al evangelio de Marcos para destacar la importancia de la intención del mismo, la (...) comunidad discursiva, su cosmovisión, etc., como elementos privilegiados para comprender su género. Marcos encuentra en los libros de la LXX su referente más cercano en relación a su dialecto, registro, vocabulario, intención y cosmovisión. (shrink)

In the summer of 1995, Santiago Castro-Gómez wrote a convincing text entitled Critique of Latin American Reason, and continued Roberto Salazar-Ramos’ work‒who also took part in The Group of Bogotá, responsible for institutionalizing the project of Latin American Philosophy in Colombia‒in order to show how the creation of “The Latin American” was possible through the operation of a series of discourses. Rather than an a priori, the category of “The Latin American” is defined by Castro-Gómez as the effect (...) of a series of discourses to which a specific cultural identity was provided. Consequently, the author uses the tradition of historicism to rethink the history of ideas, so that, instead of studying the reception of European ideas and measuring how close to that scaffolding was Latin American thought, its study should begin from the philosophical and scientific practices themselves as a “part of the critical exercise in Colombia”. It is precisely within this horizon opened by Castro-Gómez’s writings in which this essay is inserted. (shrink)

In order to clarify whether Rawls is more or less cosmopolitan than Kant, we carry out a comparative analysis between his general proposals for the organization of international relations. Likewise, seeking to clarify the distance between cosmopolitanism, pacifism and ius internationalism, the ius ad bellum proposals of both authors are particularly analyzed in the war-and-peace debate context. On the one hand, as a result of the first analysis, different commonly unnoticed logical coincidences between the postulates of Kant and Rawls are (...) highlighted. On the other hand, after the conclusions of the second analysis and taking as a criterion the causes that both authors admit as just for war, a proposal of an ideal type of cosmopolitan ius ad bellum is also provided. (shrink)

Summary Sydney Chapman is unanimously considered to have played a founding role in modern geomagnetism and to have opened up new lines of research in geophysics generally. Nevertheless, Chapman's conviction regarding the synthesis of the explanatory mechanisms of the atmosphere has gone practically unnoticed in the historiography of geophysics. This paper examines Chapman's contribution to ionospheric physics. It aims to understand Chapman's theory of ionospheric layer formation, and particularly its link to his theory of ozone formation. It deals first with (...) the traits which characterized Chapman's personality, as a way of explaining—and even perhaps justifying— his quest for the integration and synthesis of geophysical knowledge. It then analyses Chapman's model of ionospheric layers and his suggestions regarding its use as an operational tool (without ontological connotations), before continuing with his account of the formation of the ozone layer, which seemed to constitute the missing link for understanding ionosphere layer formation. The paper concludes with Chapman's attempt to reconcile geomagnetic and radio evidence. (shrink)