The origin of paraconsistent logic is closely related with the argument, ‘from the assertion of two mutually contradictory statements any other statement can be deduced’; this can be referred to as ex contradictione sequitur quodlibet (ECSQ). Despite its medieval origin, only by the 1930s did it become the main reason for the unfeasibility of having contradictions in a deductive system. The purpose of this article is to study what happened earlier: from Principia Mathematica to that time, when it became well (...) established. The two main historical claims that I am going to advance are the following: (1) the first explicit use of ECSQ as the main argument for supporting the necessity of excluding any contradiction from deductive systems is to be found in the first edition of the book Grundzüge der Theoretischen Logik (Hilbert, D. and Ackermann, W. 1928. Grundzüge der Theoretischen Logik. Berlin: Julius Springer Verlag); (2) Łukasiewicz's position regarding the logical constraints against contradictions varies considerably from his studies on the principle of (non-) contradiction in Aristotle, published in 1910 and what is stated in his `authorized lectured notes' on mathematical logic that appeared in 1929. The two texts are: 1) a paper in German (Łukasiewicz, J. 1910. `Über den Satz des Widerspruchs bei Aristotles'. Bulletin International de l'Académie des sciences de Cracovie, Classe d'Histoire et de Philosophie, pp. 15–38) [English translation: Łukasiewicz, J. 1971. ‘On the principle of contradiction in Aristotle’, Review of Metaphysics, XXIV, 485–509]; and 2) a book in Polish. Łukasiewicz, J. 1910. O zasadzie sprzecznosci u Aristotelesa Studium krytyczne, Warsaw: Panstwowe Wydawnictwo Naukowe [German translation: Łukasiewicz, J. 1993. Über den Satz des Widerspruchs bei Aristotles. Hildesheim: Georg Olms Verlag]. The lecture notes were then published as a book (Łukasiewicz, J. 1958. Elementy Logiki Matematycznej. Warszawa: Panstwowe Wydawnictwo Naukowe [PWN] and then translated into English (Łukasiewicz, J. 1963. Elements of Mathematical Logic. Oxford, New York: Pergamon Press/the Macmillan Company). The second half of this article will concentrate on Łukasiewicz's position on ECSQ. This will lead me to propose that to regard him as a forerunner of paraconsistent logic by virtue of those early writings is accurate only if his book published in Polish is considered but not if the analysis is restricted to the paper originally published in German (as has been the case for the principal reconstructions of the history of paraconsistent logic). Furthermore, I will stress that in the 1929 book he presented one formalization of ECSQ as an axiom for sentential calculus and, also, he used ECSQ to defend the necessity of consistency, apparently independently of Hilbert and Ackermann's book. At the end, I will suggest that the aim of twentieth century usage of ECSQ was to change from the centuries-long philosophical discussion about contradictions to a more ‘technical’ one. But with paraconsistent logic viewed as a technical solution to this restriction, then, the philosophical problem revives but having now at one's disposal an improved understanding of it. Finally, Łukasiewicz's two different positions about ECSQ open an interesting question about the history of paraconsistent logic: do we have to attempt a consistent reconstruction of it, or are we prepared to admit inconsistencies within it? (shrink)

The objective of this work is to establish a relationship between the cutting time in rocks, determining a speed and the point load strength index test, Is, to characterize the rock in terms of resistance and avoid sending samples to laboratories. As a first stage, on andesite samples, 5 x 5 x 10 cm test tubes were made. After the elaboration they were subjected to cutting, using an electric floor cutter and the time was evaluated. This cut was made in (...) a transversal way and two parts were obtained, one of them with dimensions 5 x 5 x 5 cm, approximately. In a third stage, the point load strength test was carried out in a press built for this purpose. Finally, the cutting speeds were correlated with the point load test values and only when rock samples do not pigeonhole on the proposed relationship, send them to the laboratory. Keywords: Mining fortification, uniaxial compressive strength, rock cutting, point load strength test index. References [1]P. Feijoo, R. Aucay, D. Ordoñez, "Aplicación del esclerómetro para la determinación de resistencia a compresión de rocas", presentado en el IV Congreso Internacional de Minería y Metalúrgia, Varadero, Cuba, 2018. [2]P. Feijoo y M. Román, «Correlación entre la Deformación y la Resistencia a la Compresión de rocas», uct, vol. 23, n.º 91, p. 6, may. 2019. [3]P. Feijoo, A. Bravo, N. Escandón, "Aplicación “UDAFORMIN” para la determinación del tipo de fortificación minera", presentado en el XII Congreso Iberoamericano de Computación para el Desarrollo, San Salvador, El Salvador, 2019. [4]P. Feijoo y C. Iñiguez, «Corte en las Rocas y su Relación con la Resistencia a Comprensión Simple», RISTI, n.º E 30, p. 59-67, jun. 2020. [5]P. Feijoo y J. Padrón, «La Resistividad de Rocas y su Relación con la Resistencia a Comprensión Simple en Mina», UCT, vol. 24, n.º 99, pp. 61-67, abr. 2020. [6]M. González. El terreno. Ediciones UPC. Barcelona. España, 2001. [7]E. Besoain. Mineralogía de Suelos. Turrialba: Instituto Interamericano de Ciencias Agrícolas de la OEA, 1970. [8]P. Feijoo, A. Flores, B. Feijoo, "The Concept of the Granulometric Area and Its Relation with the Resistance to the Simple Compression of Rocks", presentado en la 7th International Engineering, Sciences and Technology Conference, Panamá, Panamá, 2019, pp. 52-56, doi: 10.1109/IESTEC46403.2019.00018. [9]F. Blyth. Geología para Ingenieros. Cecsa. México D. F. México, 2003. [10] E. Tarbuck & F. Lutgens. Ciencias de la Tierra: Una introducción a la Geología Física. Pearson. Madrid. España, 2005. [11]L. Suarez del Rio, A. Rodríguez, L. Calleja, V. Ruiz de Argandoña, «El corte de rocas ornamentales con discos diamantados: influencia de los factores propios del sistema de corte», CSIC, vol. 48, n.º 250, pp. 53-59, abr-mayjun 1998. [12]Universidad Politécnica de Madrid. Explotaciones de Roca Ornamental. Diseño de explotaciones y selección de maquinaria y equipos. UPM. Madrid. España, 2007. [13]Catalog, Covington,. LAPIDARY & GLASS MACHINERY, USA. Retrieved from https://covington-engineering.com/content/pdf/Covington-Catalog.pdf. [14]D. Burbano, T. García, «Estimación empírica de la resistencia a compresión simple a partir del ensayo de carga puntual en rocas anisótropas », FIGEMPA, vol.1, n.º 2, pp. 13-16, dic. 2016. [15]P. Ramírez, L. de la Cuadra, R. Lain, E. Grigalbo. Mecánica de rocas aplicada a la minería metálica subterránea. Instituto Geológico Minero. Madrid. España, 1984. [16]P. Cordero, "Manual de prácticas de laboratorio de Mecánica de Rocas " tesis, Universidad Nacional Autónoma de México, México D.F., México, 2019. [17]L. González de Vallejo, M. Ferrer. Manual de campo para la descripción y caracterización de macizos rocosos en afloramientos. Instituto Geológico y Minero de España. Madrid. España, 2007. [18]P. Pohjanpera, T. Wanne, E., Johansson. Point Load Test Results From Olkiluoto Area Borehole Cores. Posiva. Finlandia, 2005. [19]P. Ramírez, L. Alejano. Mecánica de rocas: fundamentos e ingeniería de taludes. Universidad Politécnica de Madrid. Madrid. España, 2004. [20]M. Navarrete, W. Martínez, E. Alonso, C. Lara, A. Bedolla, H. Chávez, D. Delgado, J. Arteaga. «Caracterización de propiedades físico-mecánicas de rocas ígneas utilizadas en obras de infraestructura», ALCONPANT, vol. 3, n.º 2, pp. 133-143, ago. 2013. [21]P. Feijoo, "Manual de mecánica de rocas y estabilidad de túneles y taludes" tesis, Universidad del Azuay, Cuenca, Ecuador, 1997. (shrink)

Este artigo parte da hipótese de que o conceito de sujeito transcendental envolve pressupostos teóricos da física clássica. Em seguida, a partir da reformulação feita por Schopenhauer do conceito de sujeito transcendental em Kant, procuramos mostrar como a física moderna acarreta a necessidade de revisão de tal conceito, na medida em que reformula noções como espaço-tempo, matéria e causalidade. Para tal propósito recorremos à noção de monismo neutro, um tipo de materialismo não-reducionista, defendido por Bertrand Russell e Michael Lockwood.

Experiments witnessing the entanglement between two particles interacting only via the gravitational field have been proposed as a test whether gravity must be quantized. In the language of quantum information, a non-quantum gravitational force would be modeled by local operations with classical communication, which cannot generate entanglement in an initially unentangled state. This idea is criticized as too constraining on possible alternatives to quantum gravity. We present a parametrized model for the gravitational interaction of quantum matter on a classical spacetime, (...) inspired by the de Broglie–Bohm formulation of quantum mechanics, which results in entanglement and thereby provides an explicit counterexample to the claim that only a quantized gravitational field possesses this capability. (shrink)

A Dutch medical student has the potentially more virulent Panton-Valentine leukocidin form of MRSA colonization yet shows no signs or symptoms of infection. More than a year ago, a routine MRSA screening of health care personnel providing care for MRSA-positive patients detected the colonization. Since then, the student has been treated intensively but unsuccessfully in an attempt to decolonize her. During this decolonization period, the medical student was barred from performing patient-related interventions, temporarily interrupting her medical residency. After initial treatment (...) with mupirocin nasal ointment and antibiotics proved ineffective, a more stringent hygiene regime was added that included hand, nose, hair, and body scrubbing with disinfecting soap. Additional precautions included simultaneous treatment of household members and disinfection of the family home. Despite these efforts, her MRSA status has remained positive. WIP guideline s bar any health care worker diagnosed with MRSA from performing patient-related interventions. Unable to complete the residency requirement of at least 1 year of patient care, the medical student was advised to pursue a career in another profession. (shrink)

Plagiarism is a serious, yet widespread type of research misconduct, and is often neglected in developing countries. Despite its far-reaching implications, plagiarism is poorly acknowledged and discussed in the academic setting, and insufficient evidence exists in Latin America and developing countries to inform the development of preventive strategies. In this context, we present a longitudinal case study of seven instances of plagiarism and cheating arising in four consecutive classes of an Epidemiology Masters program in Lima, Peru, and describes the implementation (...) and outcomes of a multifaceted, “zero-tolerance” policy aimed at introducing research integrity. Two cases involved cheating in graded assignments, and five cases correspond to plagiarism in the thesis protocol. Cases revealed poor awareness of high tolerance to plagiarism, poor academic performance, and widespread writing deficiencies, compensated with patchwriting and copy-pasting. Depending on the events’ severity, penalties included course failure and separation from the program. Students at fault did not engage in further plagiarism. Between 2011 and 2013, the Masters program sequentially introduced a preventive policy consisting of: intensified research integrity and scientific writing education, a stepwise, cumulative writing process; honor codes; active search for plagiarism in all academic products; and a “zero-tolerance” policy in response to documented cases. No cases were detected in 2014. In conclusion, plagiarism seems to be widespread in resource-limited settings and a greater response with educational and zero-tolerance components is needed to prevent it. (shrink)

This collection of papers in epistemic logic is oriented towards applications to game theory and individual decision theory. Most of these papers were presented at the inaugural conference of the LOFT (Logic for the Theory and Games and Decisions) conference series, which took place in 1994 in Marseille. Among the notions dealt with are those of common knowledge and common belief, infinite hierarchies of beliefs and belief spaces, logical omniscience, positive and negative introspection, backward induction and rationalizable equilibria in game (...) theory. (shrink)

: New genetic technologies continue to emerge that allow us to control the genetic endowment of future children. Increasingly the claim is made that it is morally "irresponsible" for parents to fail to use such technologies when they know their possible children are at risk for a serious genetic disorder. We believe such charges are often unwarranted. Our goal in this article is to offer a careful conceptual analysis of the language of irresponsibility in an effort to encourage more care (...) in its use. Two of our more important sub-claims are: A fair judgment of genetic irresponsibility necessarily requires a thick background description of the specific reproductive choice; and there is no necessary connection between an act's being morally wrong and its being irresponsible. These are distinct judgments requiring distinct justifications. (shrink)

It has consistently been shown that agents judge the intervals between their actions and outcomes as compressed in time, an effect named intentional binding. In the present work, we investigated whether this effect is result of prior bias volunteers have about the timing of the consequences of their actions, or if it is due to learning that occurs during the experimental session. Volunteers made temporal estimates of the interval between their action and target onset , or between two events . (...) Our results show that temporal estimates become shorter throughout each experimental block in both conditions. Moreover, we found that observers judged intervals between action and outcomes as shorter even in very early trials of each block. To quantify the decrease of temporal judgments in experimental blocks, exponential functions were fitted to participants’ temporal judgments. The fitted parameters suggest that observers had different prior biases as to intervals between events in which action was involved. These findings suggest that prior bias might play a more important role in this effect than calibration-type learning processes. (shrink)

The Antecedent-Behavior-Consequence (ABC)-analysis is a tool for analyzing behavior and stems from the field of psychology where it is used as a tool for the understanding of behavior in general and organizational behavior in particular. In this paper the ABC-analysis is implemented as a tool to understand why people behave ethically in organizations, through the identification of key environmental factors that cause such behavior. This analysis can be the first step to recognizing the complexity of circumstances determining ethical behavior, as (...) well as trigger for changing that behavior. This will be elaborated in the implementation process of an ethical code. The working of the ABC-analysis will be illustrated with an example derived from field research concerning the reorganization of a department of a chemical company. (shrink)

This paper presents a method to compute a posteriori probability intervals when the initial conditional information is also given with probability intervals. The right way to make an exact computation is with the associated convex set of probabilities. Probability trees are used to represent these initial conditional convex sets because they greatly save the space required. This paper proposes a simulated annealing algorithm, which uses probability trees to represent the convex sets in order to compute the a posteriori intervals.

This paper shows Socratic elenchus as an efficient and effective way of modeling rational knowledge seeking. Like ordinary conversations, the elenctic exchanges in the dialogues presuppose a degree of autonomy on the part of its participants. Socrates’ line of questioning often seems pertinent to a particular interlocutor because he is well aware of the fact that the interlocutor has goals and ambitions or is reputed to be an expert at something. In turn, Socrates’ line ofquestioning reflects his own goals and (...) ambitions. In Alcibiades Major Socrates is trying to turn Alcibiades towards a greater awareness of his limitations. Plato’s dialogues also force readers to consider their own solutions to the topics introduced in them. Consequently, the autonomy of a dialogue’s participants requires that interpreters not exaggerate one aspect of a dialogue’s structural features at the expense of other aspects. (shrink)

This paper shows Socratic elenchus as an efficient and effective way of modeling rational knowledge seeking. Like ordinary conversations, the elenctic exchanges in the dialogues presuppose a degree of autonomy on the part of its participants. Socrates’ line of questioning often seems pertinent to a particular interlocutor because he is well aware of the fact that the interlocutor has goals and ambitions or is reputed to be an expert at something. In turn, Socrates’ line ofquestioning reflects his own goals and (...) ambitions. In Alcibiades Major Socrates is trying to turn Alcibiades towards a greater awareness of his limitations. Plato’s dialogues also force readers to consider their own solutions to the topics introduced in them. Consequently, the autonomy of a dialogue’s participants requires that interpreters not exaggerate one aspect of a dialogue’s structural features at the expense of other aspects. (shrink)

ISSN:1909-9711 (En línea) Misión La Revista Acta Colombiana de Psicología publica hallazgos originales de las investigaciones en Psicología y de esta disciplina en diálogo con otras, con el propósito de divulgarlas a la comunidad universitaria y a todas las personas interesadas en conocer sus nuevos avances y aplicaciones a distintos campos y necesidades de la sociedad contemporánea.

Chris Stewart’s account of his experiences after purchasing a farm in Andalusia, in an isolated farmhouse in the mountains adjacent to Granada, are far from the traditionally bucolic depictions of a pastoral landscape, in which the drawbacks of agricultural life become unquestionably compensated by the bliss of life in nature. Even though, as the title indicates, he seems to be a born romantic and optimist, undefeated by the inconveniences of a life without the everyday commodities of a First-World country in (...) the twenty-first century, his memoir narrative is soon balanced by his own testimony, which provides a realistic counterbalance to Stewart’s initial idealistic portrayal of life in rustic Alpujarras. Nonetheless, as this article intends to demonstrate, it is precisely this necessary demystification of the rural setting prevailing in certain areas in Andalusia that becomes crucial for the establishment of an essential complicity with the audience, thereby trained to appreciate—and even become enthralled by—the reality of the rural surroundings which the contemporary reader can no longer envision as merely a place of “vales and hills” softly covered by “a host of golden daffodils”. El relato que lleva a cabo Chris Stewart acerca de sus experiencias tras adquirir una finca en Andalucía, en un lugar apartado de la sierra lindante con Granada, se aleja de las descripciones bucólicas de paisajes pastorales en los que las desventajas de la vida agrícola quedaban incuestionablemente compensadas por el gozo de la vida en mitad de la naturaleza. Incluso pese a que, tal y como el título de su novela indica, Chris Stewart parece ser un romántico y un optimista de nacimiento, que no se deja vencer por los inconvenientes de una vida sin las comodidades cotidianas de un país del primer mundo en el siglo xxi, su memoria-narrativa se ve inmediatamente equilibrada por su propio testimonio, que proporciona un contrapunto realista al idealizado retrato inicial de la vida en las rústicas Alpujarras. No obstante, como el presente artículo pretende demostrar, es precisamente esta necesaria desmitificación del entorno rural de ciertas zonas de Andalucía lo que resulta crucial para poder establecer una esencial complicidad con el lector, que llega, de este modo, a valorar, e incluso, a sentirse fascinado, por la realidad del contexto agrario, el cual deja ya de percibir meramente como un lugar de «valles y colinas» delicadamente cubierto por «una cohorte de dorados narcisos». (shrink)

I argue that Plato’s use of thought experiments anticipate many of the themes discussed by Thomas S. Kuhn’s classic essay, “A Function for Thought Experiments.” Kuhn’s concern is that thought experiments satisfy the condition of verisimilitude. That is, thought experiments must not be conducted merely to alter the conceptual apparatus of the scientist regarding the phenomenon explored, but rather to alter the scientist’s conceptual apparatus for the sake of altering his actions (i.e., practical rationality). Plato, too, is quite concerned with (...) getting interlocutors to appreciate that theory not be separated from practice, and that theory is necessary for the process of effective decision making. Each of the interlocutors presented in the Republic, Apology and Alcibiades Minor are confrontedwith a thought experiment that is designed to effect how they choose to live. Although the three dialogues I discuss illustrate the Kuhnian admonishment against separating theory form practice, many other dialogues in the Platonic corpus echo Kuhn’s concerns. (shrink)

ABSTRACT This essay will explore the constitution of a transcendental theory of space through an examination of the notion of spatial synthesis in the works of Husserl, Paliard, and Deleuze. First, we shall explore the constitution of the sensorial fields in Husserl’s phenomenology. In Husserlian terms, space is not originally an empty form that can eventually be filled with a certain empirical content. Accordingly, the philosopher claims that spatiality is a consequence of the immanent synthesis of sensations. Then, we will (...) move on to Jacques Paliard’s psychology of perception, where we will find both aesthetic and noetic synthesis as transcendental conditions for the perception of space. Lastly, we will explore Deleuze’s theory of intensive space, specifically the concept of depth developed in a dialogue with Paliard. This comparative analysis shows that purely intensive fields of individuation are a transcendental a priori for the perception of an extensive space. (shrink)

“Para que isso servirá em minha vida?” Ao longo de minha trajetória como professor do ensino secundário, ouvi esta pergunta algumas vezes. É provável que nós professores de filosofia não sejamos um alvo privilegiado dessa pergunta provocadora. Trata-se mesmo de uma questão legítima, ainda mais para nós: latinoamericanos, brasileiros, nordestinos, piauienses. Trata-se de uma pergunta que evoca um certo desespero, uma certa pressa, um tipo de agonia que é bem nossa; como quando dizemos “estou agoniado”. Queremos tudo “pra já”. Parece (...) que jamais nos daremos o direito de viver e aprender algo pelo simples fato de que o saber é bom e merece ser fruído. (shrink)

The Holy Qur’an relates believers’ pure emotions to brotherhood. From the perspective of Islam, it has been also affirmed that two people have the same thoughts and opinions in one centre point of love in brotherhood, so fraternal feelings are not merely limited to kinship and consanguinity. In this line, the Holy Qur’an states that we have come to make you brothers with each other; not a brotherhood from parents, but an Islamic one, which is highly appreciated in the Islamic (...) society. In addition, a believing brother can never be filled when his fellow believer is hungry, and he cannot be clothed while the other is with nothing on. Islam further considers all Muslims as one family and calls everyone brothers and sisters or siblings. The true Muslims of any race and tribe as well as any language and age thus have a deep sense of brotherhood with each other, even if one lives in the Eastern parts of the world and the other in the West. In sum, this article aimed to investigate the role of religious teachings in strengthening believers’ brotherhood in the Islamic society. For this purpose, firstly, the definition of religious brotherhood was provided; secondly, religious brotherhood has been described based on the Holy Qur’an.Contribution: This article helped gain a new insight into the role of Islamic teachings in strengthening religious brotherhood in the Islamic society. Besides, the indicators of religious brotherhood were extracted and then enlightened according to the Ayat (viz. verses) from the Holy Qur’an. (shrink)

The avocado (Persea americana) is a major crop commodity worldwide. Moreover, avocado, a paleopolyploid, is an evolutionary “outpost” among flowering plants, representing a basal lineage (the magnoliid clade) near the origin of the flowering plants themselves. Following centuries of selective breeding, avocado germplasm has been characterized at the level of microsatellite and RFLP markers. Nonetheless, little is known beyond these general diversity estimates, and much work remains to be done to develop avocado as a major subtropical‐zone crop. Among the goals (...) of avocado improvement are to develop varieties with fruit that will “store” better on the tree, show uniform ripening and have better post‐harvest storage. Avocado transcriptome sequencing, genome mapping and partial genomic sequencing will represent a major step toward the goal of sequencing the entire avocado genome, which is expected to aid in improving avocado varieties and production, as well as understanding the evolution of flowers from non‐flowering seed plants (gymnosperms). Additionally, continued evolutionary and other comparative studies of flower and fruit development in different avocado strains can be accomplished at the gene expression level, including in comparison with avocado relatives, and these should provide important insights into the genetic regulation of fruit development in basal angiosperms. BioEssays 30:386–396, 2008. © 2008 Wiley Periodicals, Inc. (shrink)

The rapid and dynamic nature of digital transformation challenges companies that wish to develop and deploy novel digital technologies. Like other actors faced with this transformation, companies need to find robust ways to ethically guide their innovations and business decisions. Digital ethics has recently featured in a plethora of both practical corporate guidelines and compilations of high-level principles, but there remains a gap concerning the development of sound ethical guidance in specific business contexts. As a multinational science and technology company (...) faced with a broad range of digital ventures and associated ethical challenges, Merck KGaA has laid the foundations for bridging this gap by developing a Code of Digital Ethics (CoDE) tailored for this context. Following a comprehensive analysis of existing digital ethics guidelines, we used a reconstructive social research approach to identify 20 relevant principles and derive a code designed as a multi-purpose tool. Versatility was prioritised by defining non-prescriptive guidelines that are open to different perspectives and thus well-suited for operationalisation for varied business purposes. We also chose a clear nested structure that highlights the relationships between five core and fifteen subsidiary principles as well as the different levels of reference—data and algorithmic systems—to which they apply. The CoDE will serve Merck KGaA and its new Digital Ethics Advisory Panel to guide ethical reflection, evaluation and decision-making across the full spectrum of digital developments encountered and undertaken by the company whilst also offering an opportunity to increase transparency for external partners, and thus trust. (shrink)

ASD VIII, 1 publishes texts by Erasmus related to the Church Fathers: the Vitae of Jerome, John Chrysostom and Origen, the forgery ‘Cyprian’s _De duplici martyrio_, and the prefaces to the Fathers of the Church.

Kärin Nickelsen’s Explaining Photosynthesis: Models of Biochemical Mechanisms, 1840–1960 gives a much needed historical and philosophical account of one of the major research projects in modern plant sciences. This look at the scientific models of photosynthesis expands upon Nickelsen’s previous work with eighteenth century botanical illustration which she viewed as a type of modeling activity. Weaving between active research and the discourses around it, Nickelsen boldly attempts to find some bridge between the history of science and the philosophy of science (...) by identifying heuristic strategies based on her historical representation of photosynthesis research. While philosophically productive and rich in historical content, Nickelsen's text demonstrates, in opposition to its stated intention, that the historian’s goal of avoiding grand narratives may be incompatible with drawing philosophical conclusions based on historical work. (shrink)

We distinguish dynamical and statistical interpretations of evolutionary theory. We argue that only the statistical interpretation preserves the presumed relation between natural selection and drift. On these grounds we claim that the dynamical conception of evolutionary theory as a theory of forces is mistaken. Selection and drift are not forces. Nor do selection and drift explanations appeal to the (sub-population-level) causes of population level change. Instead they explain by appeal to the statistical structure of populations. We briefly discuss the implications (...) of the statistical interpretation of selection for various debates within the philosophy of biologythe `explananda of selection' debate and the `units of selection' debate. (shrink)

Over the past fifteen years there has been a considerable amount of debate concerning what theoretical population dynamic models tell us about the nature of natural selection and drift. On the causal interpretation, these models describe the causes of population change. On the statistical interpretation, the models of population dynamics models specify statistical parameters that explain, predict, and quantify changes in population structure, without identifying the causes of those changes. Selection and drift are part of a statistical description of population (...) change; they are not discrete, apportionable causes. Our objective here is to provide a definitive statement of the statistical position, so as to allay some confusions in the current literature. We outline four commitments that are central to statisticalism. They are: 1. Natural Selection is a higher order effect; 2. Trait fitness is primitive; 3. Modern Synthesis (MS)-models are substrate neutral; 4. MS-selection and drift are model-relative. (shrink)