Approximately one in six top economic research papers draws an explicitly causal conclusion. But what do economists mean when they conclude that A 'causes' B? Does 'cause' say that we can influence B by intervening on A, or is it only a label for the correlation of variables? Do quantitative analyses of observational data followed by such causal inferences constitute sufficient grounds for guiding economic policymaking? The Philosophy of Causality in Economics addresses these questions by analyzing the meaning of causal (...) claims made by economists and the philosophical presuppositions underlying the research methods used. The book considers five key causal approaches: the regularity approach, probabilistic theories, counterfactual theories, mechanisms, and interventions and manipulability. Each chapter opens with a summary of literature on the relevant approach and discusses its reception amongst economists. The text details case studies, and goes on to examine papers which have adopted the approach in order to highlight the methods of causal inference used in contemporary economics. It analyses the meaning of the causal claim put forward, and finally reconstructs the philosophical presuppositions accepted implicitly by economists. The strengths and limitations of each method of causal inference are also considered in the context of using the results as evidence for policymaking. This book is essential reading to those interested in literature on the philosophy of economics, as well as the philosophy of causality and economic methodology in general. (shrink)

A survey of the main approaches in a mind study -oriented part of Artificial Intelligence is made focusing on controversial issues and extreme hypotheses. Various meanings of terms: "intelligence" and "artificial intelligence" are discussed. Limitations for constructing intelligent systems resulting from the lack of formalized models of cognitive activity are shown. The approaches surveyed are then recapitulated in the light of these limitations.

It is consistent that for every function there is an uncountable set and two continuous functions such that f {f0, f1} for every A2,α≠β.

The results of econometric modeling are fragile in the sense that minor changes in estimation techniques or sample can lead to statistical models that support inconsistent causal hypotheses. The fragility of econometric results undermines making conclusive inferences from the empirical literature. I argue that the program of evidential pluralism, which originated in the context of medicine and encapsulates to the normative reading of the Russo-Williamson Thesis that causal claims need the support of both difference-making and mechanistic evidence, offers a ground (...) for resolving empirical disagreements. I analyze a recent econometric controversy regarding the tax elasticity of cigarette consumption and smoking intensity. Both studies apply plausible estimation techniques but report inconsistent results. I show that mechanistic evidence allows for discriminating econometric models representing genuine causal relations from accidental dependencies in data. Furthermore, I discuss the differences between biological and social mechanisms and mechanistic evidence across the disciplines. I show that economists mainly rely on mathematical models to represent possible mechanisms. Still, claiming the actuality of the represented mechanisms requires establishing that crucial assumptions of these models are descriptively adequate. I exemplify my approach to assessing the quality of mechanistic evidence in economics with an analysis of two models of rational addiction. (shrink)

Based on case studies prepared at the Harvard Business School, the article analyses the content of university courses on business history. Its aim is to answer the question whether or not business history courses are used for discussing the problems of CSR or moral dilemmas behind strategic decisions made by managers. The article argues that the chance of enhancing the understanding of social problems on the part of the managers and shaping their responsiveness to them, created by the presence of (...) courses on history in the academic curriculum, remains, to a large extent, unrealised. Teaching materials are still influenced by the Chandlerian paradigm and thus focus on changes in organisational structures and strategies of large multinational companies. They pay little attention to the social environment of business, rarely pose questions on the motivations of human actions or value hierarchies and avoid discussions on the social consequences of management decisions. (shrink)

As a middle path between classical theism and pantheism, the panentheistic turn in the twentieth century has been described as a "quiet revolution." Today, in fact, many theologians hold that the world is "in" God (who, at the same time, is more than the world). Panentheism has been especially influential in the dialogue between theology and the natural sciences. Many have seen panentheism as compatible with emergentism, and thus have brought the two together in developing models of divine action that (...) do not abrogate the regularities of processes of the natural world. In Divine Action and Emergence, Mariusz Tabaczek argues that, as inspiring and intriguing as emergentist panentheism is, it requires deeper examination. He begins by looking at the wonder of emergence (which calls into question the overly reductionist attitude in natural science) and by reflecting philosophically on emergence theory in light of classical and new Aristotelianism. Moving in a theological direction, Tabaczek then offers a critical evaluation of emergentist panentheism and a constructive proposal for how to reinterpret the idea of divine action as inspired by the theory of emergence with reference to the classical Aristotelian-Thomistic understanding of God's action in the universe. Through a unique interdisciplinary approach that puts theology and the natural sciences into a dialogue through philosophy, Divine Action and Emergence offers a comprehensive evaluation of panentheism. It then puts forward an original reinterpretation of emergence theory, thus setting forth a constructive proposal for reinterpreting the concept of divine action that is currently espoused by emergence theory. It will appeal to scholars of theology and philosophy, those who work in the area of theology and science, those interested in emergence theory or panentheism, and finally those who are interested in the dialogue between the classical Aristotelian-Thomistic tradition and contemporary philosophy and theology. (shrink)

The current strategy of searching for an effective treatment for COVID-19 relies mainly on repurposing existing therapies developed to target other diseases. Conflicting results have emerged in regard to the efficacy of several tested compounds but later results were negative. The number of conducted and ongoing trials and the urgent need for a treatment pose the risk that false-positive results will be incorrectly interpreted as evidence for treatments’ efficacy and a ground for drug approval. Our purpose is twofold. First, we (...) show that the number of drug-repurposing trials can explain the false-positive results. Second, we assess the evidence for treatments’ efficacy from the perspective of evidential pluralism and argue that considering mechanistic evidence is particularly needed in cases when the evidence from clinical trials is conflicting or of low quality. Our analysis is an application of the program of Evidence Based Medicine Plus to the drug repurposing trials for COVID. Our study shows that if decision-makers applied EBM+, authorizing the use of ineffective treatments would be less likely. We analyze the example of trials assessing the efficacy of hydroxychloroquine as a treatment for COVID-19 and mechanistic evidence in favor of and against its therapeutic power to draw a lesson for decision-makers and drug agencies on how excessive hypothesis testing can lead to spurious findings and how studying negative mechanistic evidence can be helpful in discriminating genuine from spurious results. (shrink)

In his recent paper in the Journal of Economic Methodology, Tobias Henschen puts forth a manipulationist definition of macroeconomic causality that strives for adequacy. As the notion of ‘adequacy’...

A considerable group of contemporary philosophers and theologians—including those engaged in the science-theology dialogue, such as Barbour, Clayton, Davies, and Peacocke—supports panentheism, i.e., a theistic position which assumes that the world is in God, who is yet greater than everything he created. They see it as a balanced middle ground between the positions of classical theism and pantheism. In this article, I offer a presentation and a critical evaluation of the most fundamental principles of panentheism from the point of view (...) of classical theism. First, I list six main species of panentheism and the motivations of those who support it. In the second part, I analyze the three main difficulties concerning its ontological and theological principles, i.e., (1) the meaning of the preposition ‘in’ (_en_) in ‘pan_en_theism’; (2) the accuracy of panentheistic definition of divine immanence, and (3) the question of whether panentheism is successful in protecting God’s transcendence. I conclude that panentheism fails as a Christian theistic position. Nevertheless, it might still be valuable and play an important role in addressing the cognitive drama of the modern human beings, often seduced by secular (scientific) or spiritual naturalism, or pantheism. (shrink)

Awareness of mortality is one of the key aspects of human existence. Death goes beyond the boundary of knowledge, mortality. However, it is actually experienced by man as something inevitable. Death is a fact – the end of life, and the experience of mortality is one of the borderline situations. In the essay, the author puts forward the thesis that the experience of mortality has a significant impact on the human understanding of values. Attitudes towards death be it fear, resignation, (...) indifference, fascination, mourning, sadness, despair after the loss of a loved one, or the desire for death, indicate the wealth of the world of value of axiological experience. The attitude of the person towards death, in some sense, is a test of our humanity, the principal value to which we refer most often. The author of the essay adopts the position of axiological relationalism, it implies that values are independent of the subject, they form a network of relational connections, but they are in a significant way connected with culture. The study of these connections: 1) with the world of people, 2) world of things, 3) internal relations that take place between values, allows us to get to know the complex structure of the world of values. In the article, the author analyzes in what sense mortality influences human understanding of values. (shrink)

A compelling approach among works on temporality, phenomenology, and the ecologies of the new sound worlds, Enacting Musical Time argues that musical time is itself the site of the interaction between musical sounds and a situated, embodied listener, created by the moving bodies of participants engaged in musical activities.

The aim of the work is to present the conservative views of the journalist and historian Henryk Lisicki and the role he played in the community with which he collaborated, i.e. the Krakow conservatives called the Stańczyk Circle. The source of the article are monographs, brochures, dissertations, essays and articles published in „Przegląd Polski“ by Lisicki. In order to evaluate to what extent Lisicki’s political thought was original, and to what extent it was in conformity with the Stańczyk Circle, the (...) publications of Walerian Kalinka, Stanisław Tarnowski, Michał Bobczyński, Józef Szujski and Stanisław Koźmian were also used. While working on the topic, the author made use of the works specializing in the history of Polish and Western conservative thought published by Ryszard Ludwikowski, Bogdan Szlachta, Jacek Bartyzel, Józef Szacki and the views expressed by the members of the Stańczyk Circle such as Michał Jaskólski, Wojciech Dutka, Stanisław Filipowicz, Henryk Michalak. When examining the above issues, a comparative method was used, tracing both the similarities and differences in the ideas of Lisicki and his colleagues from the Stańczyk Circle. The main thesis formulated in the work is that although Lisicki did not belong to the group of leaders, his close intellectual ties with Stanisław Koźmian gave him a respected position among Krakow conservatives. The analysis of his works confirmed that he was also capable of original reflections which focused on the attitude of the conservatives to the nineteenth-century democratization processes, the evolution of Western absolute monarchies towards the constitution democracies and the expansion of electoral rights. Hence, it was symptomatic for Lisicki and his community to argue, inter alia, for the necessity of rapprochement with moderate liberals, the aim of which was to weaken the danger coming from the revolted masses which were being under the influence of radicals. (shrink)

In order to achieve a desired effect of tax legal interpretation, its linguistic mechanisms are frequently insufficient. Elements of paralinguistic interpretation are more and more often indispensable. It applies inter alia when domestic tax law regulations must be verified in the light of the EU tax law. However, the study depict interpretative problems regarding the institution of remuneration of excess payments, which is regulated in Polish tax law. Considerations presented in this article confirm that legal interpretation of tax law is (...) a complicated process. It is important to establish correct system connection between the analyzed legal regulations and other provisions, often contained in other legal acts. Moreover, it seems necessary to refer to the purpose-oriented interpretation of the law. Only then a chance for a satisfactory final result of the provision’s legal interpretation can be guaranteed. What is more, such an effect will create an element being a part of a logically composed and arranged unity. (shrink)

The objective of the paper is to present the significance of general rules of tax law resulting from the new draft tax ordinance for the taxpayer’s situation. The aim of this paper is to present a general overview of the newly introduced rules of tax law. This study may be the basis for further studies in the field of subject principles. The analysis covered the rules referring to: support of the taxpayer in fulfilling tax obligations, actions of tax authorities in (...) a way that inspires taxpayer’s trust, equal treatment of taxpayers, presumption of the taxpayer’s honesty, not abandoning the established practice of resolving cases in the same factual and legal state. Within the framework of this paper, research hypotheses concerning the impact of these rules on the legal situation of the taxpayer have been positively verified. These rules will have an impact on the improvement of the taxpayer’s situation, which has to face the complicated legal environment. This environment forms the complex tax law system, as well as the intricate and complicated language used by the legislator in making tax law regulations in Poland. This confirms the need to introduce changes resulting from the new draft tax ordinance. (shrink)

[The paper is in Polish, an English abstract is given only for information.] This article is intended for philosophers and logicians as a short partial introduction to category theory and its peculiar connection with logic. First, we consider CT itself. We give a brief insight into its history, introduce some basic definitions and present examples. In the second part, we focus on categorical topos semantics for propositional logic. We give some properties of logic in toposes, which, in general, is an (...) intuitionistic logic. We next present two families of toposes whose tautologies are identical with those of classical propositional logic. The relatively extensive bibliography is given in order to support further studies. (shrink)

Can Contemporary Science Inspire Philosophical and Theological Reflection on Causality? The cooperation between natural science, philosophy, and theology in an analysis of the causal structure and co-dependency of entities in the universe seems to be both legitimate and expected. It turns out, however, that in practice it oftentimes raises some tensions, questions and difficulties, leading to the development of alternative and in a sense competitive models of causality and of God’s action in the world. What is more, the attitude of (...) natural sciences since modernity, concentrated on gaining knowledge about natural phenomena to predict and control them, without trying to determine the nature of their ultimate causes, Humean criticism and rejection of the concept of causality as such, and concentration of analytic philosophers on the description of what accompanies phenomena classified as causal, leaving aside the question of the metaphysical status of causes and effects – they all seem to make impossible an interaction and mutual reference of contemporary science, philosophy, and theology in their reflection on the topic of causation. The main goal of this article is to defend the thesis about the possible and actual influence of scientific analysis of cause and effect relationships on the philosophical and theological reflection on causation, not only in the Middle Ages and Modernity, but also in contemporary thought. The presentation of the latest positions in the debate on divine action in the natural world will be followed by an argument in favor of the relevance of the model developed by philosophers and theologians representing the Thomistic school. (shrink)

The methodological nonreductionism of contemporary biology opens an interesting discussion on the level of ontology and the philosophy of nature. The theory of emergence (EM), and downward causation (DC) in particular, bring a new set of arguments challenging not only methodological, but also ontological and causal reductionism. This argumentation provides a crucial philosophical foundation for the science/theology dialogue. However, a closer examination shows that proponents of EM do not present a unified and consistent definition of DC. Moreover, they find it (...) difficult to prove that higher-order properties can be causally significant without violating the causal laws that operate at lower physical levels. They also face the problem of circularity and incoherence in their explanation. In our article we show that these problems can be overcome only if DC is understood in terms of formal rather than physical (efficient) causality. This breakdown of causal monism in science opens a way to the retrieval of the fourfold Aristotelian notion of causality. (shrink)

Making more accurate marketing decisions by managers requires building effective predictive models. Typically, these models specify the probability of customer belonging to a particular category, group or segment. The analytical CRM categories refer to customers interested in starting cooperation with the company, customers who purchase additional products or customers intending to resign from the cooperation. During building predictive models researchers use analytical tools from various disciplines with an emphasis on their best performance. This article attempts to build a hybrid predictive (...) model combining decision trees and cluster analysis. During experiments five different cluster validity indices and eight datasets were used. The performance of models was evaluated by using popular measures such as: accuracy, precision, recall, G-mean, F-measure and lift in the first and in the second decile. The authors tried to find a connection between the number of clusters and models' quality. (shrink)

Artykuł stanowi krytyczne omówienie książki Kevina Duttona zatytułowanej Mądrość psychopatów. Lekcja życia pobrana od świętych, szpiegów i seryjnych morderców. Celem pracy jest przybliżenie zasadniczych tez stawianych przez autora oraz zaproszenie do namysłu nad psychopatią – zarówno jako fenomenem naukowym, jak i egzystencjalnym.

The wound inflicted by the clerical sexual abuse scandal and its cover-up runs so deep that it is sometimes deemed impossible to talk about the church at the beginning of the twenty-first century in a credible way without making at least some reference to this problem. This opinion is seemingly partially shared by current and previous pontiffs, who, on many occasions and in various contexts, have touched upon this issue. In the many interventions in which Benedict XVI and Francis have (...) raised this sad topic, they have apologised on behalf of the leaders of the church for the cases of abuse and for the following cover-up. They have offered words of regret and consolation to victims, their families, the entire church and the world, and have promised to do everything possible to prevent it from happening again. Further, they have attempted to identify the causes of the problem to understand how it could have taken place and the actions required to prevent this tragedy from recurring. Their analyses bear signs of similarities and dissimilarities. The purpose of this article is to ask what the church in Australia, and the church in general, can learn from the two popes' approaches to this problem, not only with regard to handling possible future cases of abuse, but also with regard to the general ways of existing as a church in the twenty-first century. Behind Francis's and Benedict's conclusions lie their own theologies of the church, which are worth exploring since they contain important lessons and signposts for the church at the beginning of the third millennium. (shrink)

The author’s firm belief is that transitional humanity is not yet humanity proper but pre-humanity. He is especially intrigued by the essence and purpose of today’s contradiction between humanity’s immense advancement in micro-electronics, digital technology and social lore and its shocking moral shortcomings, best visible in its stagnant unchangeability—especially regarding the passionate quest for ever-better weaponry. Will our transience turn out to be nothing more but a phase on the road to human perfection, or will it petrify into an “inborn” (...) scar? These are the main questions the author attempts to answer.As a species we are praehomine, pre-humans, a natural phase of ethical and esthetic imperfection. Typical for transitional humanity is the coexistence of progress. Nonetheless transitional humanity also carries the potential necessary to attain Wisdom, Good, Completeness and Perfection. (shrink)

In a series of influential articles Jaegwon Kim has developed strong arguments against nonreductive physicalism as a possible solution to the problem of mental causation. One of them is the Supervenience Argument which states that assuming the mental/physical supervenience thesis, the causal closure principle, the exclusion principle with the no-overdetermination requirement and property dualism we obtain the conclusion that mental causation is unintelligible. On the other hand Collin McGinn has argued that a solution to the mind-body problem is forever beyond (...) our reach: we can never understand how the brain produces consciousness and therefore the relation between them must remain mysterious. The main aim of the paper is to demonstrate that Kim's Supervenience Argument corroborates McGinn's pessimistic conclusion (of course, if we do not assume any form of reductive physicalism or epiphenomenalism). Thereby it tries to show that the Supervenience Argument could be treated as a justification of non-constructive naturalism (aka new misterianism): we do not understand mental causation, because we cannot understand how the brain generates consciousness. It also suggest considering possibility that the thesis of causal closure of the physical domain might entail the cognitive closure thesis (the claim that those properties of the brain which are responsible for conscious processes are in principle cognitively closed to us). (shrink)

Mereologcal essentialism is a metaphysical doctrine formulated and defended originally by Roderick M. Chisholm. The main principle of mereological essentialism states, that for any objects x and y - if x is ever a part of y, then y is necessarily such that x is a part of y, i.e. that all parts of y are essential to it (y has them at any time that y exists). The principle may also be put by saying, that every object has the (...) parts that it has necessarily. In the paper the above mentioned doctrine is reconstructed and analysed. Some consequences of the theory in question as well as many variants of it are examined. The main purpose of the text is to provide a critical analysis of mereological essentialism in order to make this radical doctrine more acceptable. (shrink)

This article examines the dynamics that allowed the derogatory term “Ostjuden” to reappear in academic writing in post-Holocaust Germany. This article focuses on the period between 1980’s and 2000’s, complementing earlier studies that focused on the emergence of the term “Ostjuden” and on the complex representations of Eastern European Jews in Imperial and later Weimar Germany. It shows that, despite its well-evidenced discriminatory history, the term “Ostjuden” re-appeared in the scholarly writing in German and has also found its way into (...) German-speaking public history and journalism. This article calls for applying the adjectival term “osteuropäische Juden”, using a term that neither essentializes Eastern European Jews nor presents them in an oversimplified and uniform manner. (shrink)

I consider the problem of existence of virtual objects, mainly their mode of existence, while omitting the issue of the criteria of their existence. I present and analyze the concepts of modes of existence of virtual objects proposed in the literature of the subject, and then I demonstrate my own position on the issue. My position on the existence of virtual objects has certain points coinciding with the already postulated views, but at the same time it differs from them in (...) some basic aspects. In my view virtual objects are “born” in human individual consciousness as the objects of specific creative states of the mind. So initially they are private objects belonging to the individual subjective sphere. However, their final and ready forms emerge in complex processes of objectifying and autonomizing the respective private conscious states and their objects. In these processes the private objects are transformed into objects intersubjectively accessible and existing in the collective cultural sphere. In both their forms, initial and final, virtual objects are non-material entities: first subjective, then objective. The ontic status of virtual objects is very similar to the status of intangible ideas and all the non-material objects created by the human mind. The main difference consists in that virtual objects are expressed by the use computers programmes, while other non-material objects created by human beings are expressed by use of words, pictures, literature and art works, etc. (shrink)

W oparciu o koncepcję Richarda Rorty’ego oraz Hansa-Georga Gadamera poddano analizie hermeneutyczną ideę integracji estetycznej, oraz autokreacji a także omówiono ich znaczenie dla transformacji paradygmatycznej, której efektem jest społeczeństwo ponowoczesne. Przedstawiono relację pomiędzy poznawczą i integrującą funkcją doświadczenia sztuki. Wykorzystując argumentację Stanisława Ignacego Witkiewicza omówiono związki pomiędzy doświadczeniem katastrofy historycznej a możliwością transformacji paradygmatycznej. Przedstawiono powody, dla których integracja estetyczna nie może stać się narzędziem powstrzymującym katastrofę. On experiencing catastrophe, art and postmodern society Basing on the concept by Richard Rorty (...) and Hans George Gadamer a hermeneutic idea of aesthetic integration and self-creation is analysed and their significance for paradigmatic transformation, which results in postmodern society, is discussed. The relation between cognitive and integrating function of experiencing the art is presented. Relations between experiencing historical catastrophes and the opportunity of paradigmatic transformation are discussed with the use of the argumentation of Stanisław Ignacy Witkiewicz. The reasons why aesthetic integration cannot become the tool to stop the catastrophe are presented. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Evolution and Creation—A Response to Michael Chaberek's Critique of Theistic EvolutionMariusz Tabaczek O.P.Translated by Monika Metlerska-ColerickIntroductionMichael Chaberek's critique of my "Afterword" to the Polish edition of Thomistic Evolution: A Catholic Approach to Understanding Evolution in the Light of Faith is essentially focused on three points. First of all, Chaberek questions my thesis supporting the compatibility of evolutionary theory with the Christian faith in creation. Secondly he discounts the possibility (...) of reconciling evolution with the Aristotelian-Thomistic philosophical tradition. Finally he provides arguments undermining the theory of evolution as the best scientific explanation for the diversity of species observable in the world.1 Because I do not undertake an analysis [End Page 255] of strictly biological problems in the "Afterword," in the present response I will concentrate on the first two points only.2 I trust that engaging in a discussion with Chaberek's views in this respect provides an opportunity to broaden and clarify my position regarding the issue which is the subject of our dispute. To begin with, I would like to stress that, in exploring the topic from the perspective of the Aristotelian-Thomistic tradition of philosophy and theology, I am moving in the sphere of possible interpretations and new approaches. Therefore, I do not treat the aforementioned tradition in an inflexible and dogmatic manner.3 [End Page 256]The Definition of CreationI should start my response to Chaberek's critique by invoking the definition of creation as elaborated by Aquinas. After all, it seems that the disagreement referred to in the present article focuses, to a large extent, on the comprehension of the divine act of creation. My views on this matter are not, in my estimation, a significant alteration of the teaching of St. Thomas. Rather, they are an attempt at drawing conclusions from some of his intuitions regarding creation, which appear in various sections of the body of his work.4According to St. Thomas, the word "creation" (creatio) has two crucial and inextricably linked meanings: (I) creation in an active sense (divine action) and (II) creation in a passive sense (receiving divine action). Within the scope of the first meaning, St. Thomas distinguishes between: (Ia) the primary act of creation, defined as bringing the entirety of being into existence out of nothing (ex nihilo), without any prior existing matter, and (Ib) maintaining contingent beings in their existence and essence. The consequence of (Ia) and (Ib) is contingent beings' full dependence on God regarding what they are and the fact that they are (exist), which determines the essence of creation in the passive sense (II).Regarding (Ia), St. Thomas—in a neo-Platonic vein, in support of the claim that nothingness cannot be the object of God's action in the act of creation—states that "we must consider not only the emanation of a particular being from a particular agent, but also the emanation of all being from the universal cause, which is God; and this emanation we designate by the name of creation" (ST I, q 45, a. 1, corp.). It is worth adding here that, according to St. Thomas, the matter, which is the result of the act of creation, is not indefinite, as is assumed by Chaberek when he refers to creation as the bringing out of nothing "of a certain primordial matter of an indefinite form."5 On the contrary, Aquinas states explicitly that "primary matter was not created altogether formless, nor under any one common form, but under [End Page 257] distinct forms" (ST I, q. 66, a. 1, corp., ad 2), enumerating, at this point, the forms of the four elements: earth, water, air, and fire.In reference to (Ib), St. Thomas defines the divine act of maintaining contingent beings in existence and essence (in the fact that they are, as well as in what they are) as conservatio rerum. What is more, even though he emphasizes that "the preservation of things by God is a continuation of that action whereby He gives existence" (ST I, q. 104, a. 1, ad 4), Aquinas does not employ the currently popular concept of continual creation (creatio continua). It seems that... (shrink)

Volume 27, Issue 3, September 2020, Page 266-268.