Text porovnává přesvědčovací strategie využité ve velmi podobných politicky angažovaných videoklipech The Great Schlep a Přemluv bábu. Ukazuje, že přestože se klip Přemluv bábu od své americké předlohy zásadně neliší v obecné struktuře, deklarovaném cíli či motivické výbavě, v jiných persvazivně významných ohledech se původnímu klipu vzdaluje. Rozdíly jsou patrné zejména v odlišné konstrukci publika, v jiném situování mluvčích a v topickém výběru vyjádřeném jinými stylistickými prostředky.

Thought experiments are frequently vague and obscure hypothetical scenarios that are difficult to assess. The paper proposes a simple model of thought experiments. In the first part, I introduce two contemporary frameworks for thought experiment analysis: an experimentalist approach that relies on similarities between real and thought experiment, and a reasonist approach focusing on the answers provided by thought experimenting. Further, I articulate a minimalist approach in which thought experiment is considered strictly as doxastic mechanism based on imagination. I introduce (...) the basic analytical tool that allows us to differentiate an experimental core from an attached argumentation. The last section is reserved for discussion. I address several possible questions concerning adequacy of minimalistic definition and analysis. (shrink)

The paper is a contribution to the debate on the epistemological status of thought experiments. I deal with the epistemological uniqueness of experiments in the sense of their irreducibility to other sources of justification. In particular, I criticize an influential argument for the irreducibility of thought experiments to general arguments. First, I introduce the radical empiricist theory of eliminativism, which considers thought experiments to be rhetorically modified arguments, uninteresting from the epistemological point of view. Second, I present objections to the (...) theory, focusing on the critique of eliminativism by Tamar Szabó Gendler based on the reconstruction of famous Galileo's Pisa experiment. I show that her reconstruction is simplistic and that more elaborate reconstruction is needed for an appropriate assessment of the epistemic power of general argument. I propose such a reconstruction and demonstrate that general version of Pisa experiment is epistemically equal to the particular one. Thus, from an epistemological perspective, Galileo's thought experiment is reducible to a straightforward argument without particular premises. (shrink)

Epistemological optimists about thought experiments hold that imagination could be under certain conditions source of epistemic justification. Their claim is usually based on one of three dominant conceptions about epistemic value of thought experiments. Apriorism states that imagination may serve as unique a priori source of new synthetic knowledge about the actual world. I argue against this view and show that apriorism is either too weak, or too strong or too vague. Psychologism is viable, yet not fully clear conception about (...) new meta-knowledge obtained by thought experimenting. I compare some interpretations of this position and present reasons for favorizing one of them. Conceptualism considers thought experiments as instruments for cleaning our conceptual systems. I argue that this position is in fact not about epistemic value of thought experiments, but about one specific usage of experimental result. (shrink)

The text focuses on Lem’s rejection of the Chinese Room, a prominent challenge to the sufficiency of the Turing test. After outlining Lem’s relationship to the Turing test, it offers an exposition of two of Lem’s thought experiments, the Gramophone and the Jigsaw, whose critique is directly related to the critique of the Chinese Room. The text shows that Lem’s key argument is to point out the computational naivety of the machines that feature in these experiments. The text concludes by (...) presenting some of Lem’s views on the nature of machine consciousness. (shrink)

[Functionalism, Zombies and the Absence of a Mental Dictionary].

In the review of 100 myšlenkových experimentů ve filozofii (2013) Jakub Mácha raises several questions concerning our approach to thought experiment analysis. We address all of his remarks; particularly, we answer three questions: Which type of imagination do we use in our definition of thought experiments? How is the cognitive aim of thought experiments related to their cognitive value? Is the analysis of Plato’s Cave proposed in our book appropriate?

Audiozáznam přednášky proslovené ve Filozofické jednotě na Katedře filozofie dne 26. března 2012.V přednášce se pokouším o velmi základní rozlišení tří funkcí, jež mohou myšlenkové experimenty plnit. Nejprve nabízím liberální definici myšlenkového experimentu, podle níž nejde nutně o výjimečné, nereálné, teoreticky zajímavé, bizarní, imaginární scénáře, nýbrž o celkem běžné představování si situace s kognitivním cílem. Snažím se ukázat, že navzdory své šíři je tato definice přiměřeným zachycením všech podstatných vlastností útvarů, jež intuitivně mezi myšlenkové experimenty počítáme. Stručně se poté věnuji (...) prvnímu významu myšlenkových experimentů: imaginární příklady jsou názornou pomůckou při posilování již získaných přesvědčení. Jejich první význam je didaktický. Druhý možný význam myšlenkových experimentů je předmětem vyhraněných diskusí zejména v posledním dvacetiletí: imaginární příklady jsou zdrojem zdůvodnění. Jejich druhý význam je tedy epistemický. Zatímco je však první, didaktický význam zcela nekontroverzní, epistemický význam myšlenkových experimentů je předmětem mnoha odmítnutí. Myšlenkové experimenty jsou tak často odkázány pouze do role názorných pomůcek bez další hodnoty. Snažím se ukázat, že existuje ještě třetí význam myšlenkových experimentů, význam dialektický. Vhodně použitý myšlenkový experiment může v kritické diskusi sloužit jako „přenašeč důkazního břemene”, tj. dokáže vyvolat argumentační tlak na protistranu. Imaginární scénář může za jistých okolností fungovat jako legitimní argument, aniž bychom však nutně museli předpokládat silný epistemický význam myšlenkových experimentů. Myšlenkové experimenty tak mohou být víc než jen líbivé ornamenty, zároveň ale nejsme zavázáni k obhajobě problematické epistemické teze.klíčová slova: myšlenkový experiment, epistemologie, důkazní břemeno. (shrink)

Descriptions of bodies within the literature of the enactive approach to cognitive science exhibit an interesting dialectical tension. On the one hand, a body is considered to be a unity which instantiates an identity, forming an intrinsic basis for value. On the other, a living body is in a reciprocally defining relationship with the environment, and is therefore immersed and entangled with, rather than distinct from, its environment. In this paper I examine this tension, and its implications for the enactive (...) approach, particularly the enactive conceptions of life and bodies. Following the lead of others, I argue that enactive cognitive science can benefit from a deeper reading and integration with extant work on the complexity and multiplicity of the living body within feminist philosophy and feminist science studies. (shrink)

Can we see the expressiveness of other people's gestures, hear the intentions in their voice, see the emotions in their posture? Traditional theories of social cognition still say we cannot because intentions and emotions for them are hidden away inside and we do not have direct access to them. Enactive theories still have no idea because they have so far mainly focused on perception of our physical world. We surmise, however, that the latter hold promise since, in trying to understand (...) cognition, enactive theory focuses on the embodied engagements of a cognizer with his world. In this paper, we attempt an answer for the question What is social perception in an enactive account? In enaction, perception is conceived as a skill, crucially involving action, an ability to work successfully within the set of regularities, or contingencies that characterize a given domain. If this is the case, then social perception should be a social skill. Having thus transformed the question of what social perception is into that of what social skill is, we examine the concept of social contingencies and the manner in which social skills structure—both constrain and empower— social interaction. Some of the implications of our account for how social and physical perception differ, the role of embodiment in social interaction and the distinction between our approach and other social contingency theories are also addressed. (shrink)

Clinical Ethics Consultations are an important tool for physicians in solving difficult cases. They are extremely common in North America and to a lesser extent also present in Europe. However, there is little data on this practice in Poland. We present results of a survey of 521 physicians practising in Poland concerning their opinion on CECs and related practices. We analysed the data looking at such issues as CECs’ perceived availability, use of CECs, and perceived usefulness of such support. Physicians (...) in our study generally encounter hard ethics cases, even—surprisingly—those who do not work in hospitals. Most physicians have no CEC access, and those that do still do not employ CECs. However, physicians perceive this form of support as useful—even more so among actual users of CECs. We compared these findings with similar studies from other European countries and the North America. We point out peculiarities of our results as compared to those in other countries, with some possible explanations. We hope the results may encourage regulatory debate on the need to formally introduce CECs into the Polish healthcare system. (shrink)

Bell’s theorem cannot be proved if complementary measurements have to be represented by random variables which cannot be added or multiplied. One such case occurs if their domains are not identical. The case more directly related to the Einstein–Rosen–Podolsky argument occurs if there exists an ‘element of reality’ but nevertheless addition of complementary results is impossible because they are represented by elements from different arithmetics. A naive mixing of arithmetics leads to contradictions at a much more elementary level than the (...) Clauser–Horne–Shimony–Holt inequality. (shrink)

Newtonian physics is based on Newtonian calculus applied to Newtonian dynamics. New paradigms such as ‘modified Newtonian dynamics’ change the dynamics, but do not alter the calculus. However, calculus is dependent on arithmetic, that is the ways we add and multiply numbers. For example, in special relativity we add and subtract velocities by means of addition β1⊕β2=tanh+tanh-1)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\beta _1\oplus \beta _2=\tanh \big +\tanh ^{-1}\big )$$\end{document}, although multiplication β1⊙β2=tanh·tanh-1)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} (...) \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\beta _1\odot \beta _2=\tanh \big \cdot \tanh ^{-1}\big )$$\end{document}, and division β1⊘β2=tanh/tanh-1)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\beta _1\oslash \beta _2=\tanh \big /\tanh ^{-1}\big )$$\end{document} do not seem to appear in the literature. The map fX=tanh-1\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$f_{\mathbb{X}}=\tanh ^{-1}$$\end{document} defines an isomorphism of the arithmetic in X=\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\mathbb{X}}=$$\end{document} with the standard one in R\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\mathbb{R}}$$\end{document}. The new arithmetic is projective and non-Diophantine in the sense of Burgin, 1977), while ultrarelativistic velocities are super-large in the sense of Kolmogorov, 1961). Velocity of light plays a role of non-Diophantine infinity. The new arithmetic allows us to define the corresponding derivative and integral, and thus a new calculus which is non-Newtonian in the sense of Grossman and Katz. Treating the above example as a paradigm, we ask what can be said about the set X\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\mathbb{X}}$$\end{document} of ‘real numbers’, and the isomorphism fX:X→R\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$f_{{\mathbb{X}}}:{\mathbb{X}}\rightarrow {\mathbb{R}}$$\end{document}, if we assume the standard form of Newtonian mechanics and general relativity but demand agreement with astrophysical observations. It turns out that the observable accelerated expansion of the Universe can be reconstructed with zero cosmological constant if fX≈0.8sinh/\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$f_{\mathbb{X}}\approx 0.8\sinh /$$\end{document}. The resulting non-Newtonian model is exactly equivalent to the standard Newtonian one with ΩΛ=0.7\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Omega _\Lambda =0.7$$\end{document}, ΩM=0.3\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Omega _M=0.3$$\end{document}. Asymptotically flat rotation curves are obtained if ‘zero’, the neutral element 0X\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$0_{{\mathbb{X}}}$$\end{document} of addition, is nonzero from the point of view of the standard arithmetic of R\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\mathbb{R}}$$\end{document}. This implies fX-1=0X>0\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$f^{-1}_{{\mathbb{X}}}=0_{{\mathbb{X}}}>0$$\end{document}. The opposition Diophantine versus non-Diophantine, or Newtonian versus non-Newtonian, is an arithmetic analogue of Euclidean versus non-Euclidean in geometry. We do not yet know if the proposed generalization ultimately removes any need of dark matter, but it will certainly change estimates of its parameters. Physics of the dark universe seems to be both geometry and arithmetic. (shrink)

W artykule tym rozważana jest kwestia zmienności Boga, której „pochodną” – biorąc pod uwagę stwierdzenie Arystotelesa, że „substratem” czasu jest ruch – jest tytułowy problem czasowości Boga. Aby uwyraźnić i uchwycić wiążące się z tymi zagadnieniami trudności i dylematy, odwołano się do teologii chrześcijańskiej, a w szczególności do problematyki stworzenia, objawienia, a także – co się z tym wiąże – wcielenia oraz zbawienia. Wyprowadzono wniosek, że należy przyjąć, iż w Bogu realizuje się zupełnie inna niż kauzalna zasada ruchu, stąd też (...) i struktura Jego zmienności musi być radykalnie odmienna. Ten domniemany rodzaj Boskiej czasowości można nazwać czasem absolutnym i uznać, że przypomina on coś, co z naszej ludzkiej perspektywy da się za Heglem określić teraźniejszą obecnością. (shrink)

Artykuł podejmuje polemikę z obiegowym rozumieniem tolerancji. Autor podkreśla znaczenie podziału na tolerancję jako postawę i na dyskursy o tolerancji. Następnie, w nawiązaniu i częściowo w dyskusji z koncepcją tolerancji zaproponowaną przez Iję Lazari Pawłowską, przedstawione jest rozróżnienie trzech odmian tolerancji, a także rozróżnienie odpowiednich trzech odmian nietolerancji. Rozważane są również niektóre paradoksy związane z tolerancją oraz ze zwalczaniem nietolerancji.

According to UNESCO guidelines, one of the four forms of bioethics committees in medicine are the Hospital Ethics Committees. The purpose of this study was to evaluate how the above guidelines are implemented in real practice. There were 111 hospitals selected out of 176 Polish clinical hospitals and hospitals accredited by Center of Monitoring Quality in Health System. The study was conducted by the survey method. There were 56 hospitals that responded to the survey. The number of HECs members fluctuated (...) between 3 and 16 members, where usually 5 members were part of the board committee. The composition of the HECs for professions other than physicians was diverse and non-standardized. Only 55 % of HECs had a professional set of standards. 98 % of HECs had specific tasks. 62 % of HECs were asked for their expertise, and 55 % prepared <6.88 % of the opinions were related to interpersonal relations between hospital personnel, patients and their families with emphasis on the interactions between superiors and their inferiors or hospital staff and patients and their families. Only 12 % of the opinions were reported by the respondents as related to ethical dilemmas. In conclusion, few Polish hospitals have HECs, and the structure, services and workload are not always adequate. To ensure a reliable operation of HECs requires the development of relevant legislation, standard operating procedures and well trained members. (shrink)

Enactive and ecological approaches to cognitive science both claim a “mutuality” between agents and their environments – that they have a complementary nature and should be addressed as a single whole system. Despite this apparent agreement, each offers criticisms of the other on precisely this point – enactivists claiming that ecological psychologists over-emphasise the environment, while the complementary criticism, of agent-centred constructivism, is levelled by ecological psychologists at enactivists. In this paper I suggest that underlying the confusion between the two (...) approaches is the complexity of agency, which comes in different forms, at different scales or levels of analysis. Cognitive science has not theorised the relationship between these different forms in a sufficiently disciplined manner, and a task therefore remains of finding a way to map the complex territory of agency. (shrink)

Kuala Lumpur is a diverse city representing many different religions and nationalities. Recent government policy has actively promoted unity and cohesion throughout the city; and the country of Malaysia, with the implementation of a programme called 1Malaysia. In this book, the authors investigate the aims of this programme – predominantly to unify the Malaysian society – and how these objectives resonate in the daily spatial practices of the city’s residents. -/- This book argues that elements of urban infrastructure could work (...) as an essential mediator ‘beyond community’, allowing inclusive social structures to be built, despite cultural and religious tensions existing within the city. It builds on the premise of an empirical study which explores the ways in which different communities use the same spaces, supported through the implementation of a theoretical framework which looks at both Western and Islamic conceptualisations of the notion of community. Through the analysis of Kuala Lumpur, this book contributes towards the creation of more inclusive places in multi-ethnic, multi-cultural and multi-religious communities across the world. (shrink)

Local hidden-variable model of singlet-state correlations discussed in Czachor is shown to be a particular case of an infinite hierarchy of local hidden-variable models based on an infinite hierarchy of calculi. Violation of Bell-type inequalities can be interpreted as a ‘confusion of languages’ problem, a result of mixing different but neighboring levels of the hierarchy. Mixing of non-neighboring levels results in violations beyond the Tsirelson bounds.

This chapter outlines an embodied conception of noise. From an enactive and ecological perspective noise is an inevitable complement to the richness of bodily sensitivities and complex actions. The world around us, the universe, is replete, full of inexhaustible texture available to be explored at every scale at which we are capable, or can become capable, of making distinctions. Drawing on work in ecological psychology I suggest that noise is our experience of that encompassing fullness, and can be encountered in (...) a number of different ways depending on the organisation of our bodies and activities at different scales across a given period. While that fullness can be overwhelming, and create challenges for us to distinguish and coordinate effectively with the particular aspects of the world most relevant to our present concerns - noise can be intrusive and disruptive - I argue that there are significant positive aspects to the phenomenon. Noise is an inherent part of the rich messiness of the world as discussed in recent enactive work, which provides both robustness to developmental processes as well as opportunities for action that support adaptive agency. In a noisy, messy world there are always more options available to explore. (shrink)

We generalize the notion of analytic/Borel equivalence relations, orbit equivalence relations, and Borel reductions between them to their continuous and quantitative counterparts: analytic/Borel pseudometrics, orbit pseudometrics, and Borel reductions between them. We motivate these concepts on examples and we set some basic general theory. We illustrate the new notion of reduction by showing that the Gromov–Hausdorff distance maintains the same complexity if it is defined on the class of all Polish metric spaces, spaces bounded from below, from above, and from (...) both below and above. Then we show that [Formula: see text] is not reducible to equivalences induced by orbit pseudometrics, generalizing the seminal result of Kechris and Louveau. We answer in negative a question of Ben Yaacov, Doucha, Nies, and Tsankov on whether balls in the Gromov–Hausdorff and Kadets distances are Borel. In appendix, we provide new methods using games showing that the distance-zero classes in certain pseudometrics are Borel, extending the results of Ben Yaacov, Doucha, Nies, and Tsankov. There is a complementary paper of the authors where reductions between the most common pseudometrics from functional analysis and metric geometry are provided. (shrink)

The purpose of my dissertation is twofold. First of all, I seek to clarify Lonergan's argument for grounding the act of self-affirmation. This clarification in turn enables me to achieve the second purpose of my dissertation, namely, to strengthen the case for the soundness of the epistemic grounding, transformation, and unification of knowledge that Lonergan proposes in Insight. ;To most readers of Lonergan it is obvious that he finds the ultimate epistemic ground of knowledge in the act of a subject's (...) self-affirmation as a knower. This act has all the properties of a self-validating increment of knowledge, which leads many readers of Lonergan to believe that it should be used as the principle of a universal system of knowledge of a deductive type . This interpretation would lead to difficulties, since a deductive justification would be required for every step of the process of grounding, transforming, and unifying knowledge within a single coherent system. ;In my dissertation, I propose an interpretation that takes the act of self-affirmation as just one of several possible examples upon which the method of critically grounding individual judgments can be based. This method can be used to ground different judgments, including all the judgments that constitute steps in the process of transforming and unifying knowledge. Hence, my interpretation of the act of self-affirmation as just one of several possible examples of a grounded judgment transforms Lonergan's philosophy from what some suppose to be a deductive system into a set of interrelated and undeniable solutions of epistemological problems, a set of solutions that may be used in turn to correct and harmonize metaphysics, the rest ofphilosophy, science, and common sense knowledge. On this interpretation, the problem of the deductive justification of different elements of Lonergan's epistemology becomes irrelevant. This strengthens the case for the soundness of Lonergan's attempt to unify knowledge within a single coherent pattern. (shrink)

Perceptual modalities have been traditionally considered the product of dedicated biological systems producing information for higher cognitive processing. Psychological and neuropsychological evidence is offered which undermines this point of view and an alternative account of modality from the enactive approach to understanding cognition is suggested. Under this view, a perceptual modality is a stable form of perception which is structured not just by the biological sensitivities of the agent, but by their goals and the set of skills or expertise which (...) they are deploying at a given time. Such a view suggests that there is no such thing as an experience that is purely visual, auditory, or otherwise modal and that our attempts to understand consciousness and the mind must be conducted within a framework that provides an account of embodied, goal-directed adaptive coping with the world. (shrink)

The Polish equivalents of Research Ethics Committees are Bioethics Committees (BCs). A questionnaire study has been undertaken to determine their situation. The BC is usually comprised of 13 members. Nine of these are doctors and four are non-doctors. In 2006 BCs assessed an average of 27.3 ± 31.7 (range: 0–131) projects of clinical trials and 71.1 ± 139.8 (range: 0–638) projects of other types of medical research. During one BC meeting an average of 10.3 ± 14.7 (range: 0–71) projects of (...) medical research were assessed (2006). The amendment of Polish laws according with Directive 2001/20/EC caused a percentage increase in BCs which assessed less than 20 projects per year (16% vs. 33% or 42% in 2003 vs. 2005 or 2006 respectively, p < 0,05). The results confirm the usefulness of the current practice of creating BCs by medical universities, medical institutes and regional chambers of physicians and dentists but rationalization of the workload for individual BCs is necessary. (shrink)

According to The Consensus Gentium Argument from the premise: “Everyone believes that God exists” one can conclude that God does exist. In my paper I analyze two ways of defending the claim that somebody’s belief in God is a prima facie reason to believe. Kelly takes the fact of the commonness of the belief in God as a datum to explain and argues that the best explanation has to indicate the truthfulness of the theistic belief. Trinkaus Zagzebski grounds her defence (...) on rationality of epistemic trust in others. In the paper I argue that the second line of reasoning is more promising and I propose its improved version. (shrink)