Volume 48, Issue 2, July 2019, Page 321-325.

The grounding or motivating intuitions behind internalism and externalism seem to be fundamentally at odds. If there is ever to be a viable or satisfying solution to the problem, it must satisfy the grounding intuitions behind both sides of the debate. Duncan Pritchard claims his theory of epistemological disjunctivism (ED) does just this, arguing that it could be the holy grail we have all been waiting for. However, I believe the holy grail is already out there in the form of (...) the theory that knowledge is a mental state (KMS). In this article, I defend the idea the KMS is far better able to satisfy the internalist and externalist intuitions than ED. (shrink)

In this paper I aim to defend the claim that we are a priori entitled to accept that a speaker is being sincere, unless there are positive reasons not to. I look initially at the trust approach to testimony, which claims affective trust plays an epistemic role in our coming to believe that a speaker is being sincere. My claim is that this view is mistaken, and yet has something important to say in recognising the essential difference between testimony and (...) other forms of evidence. This difference is intentionality. It is my view that in exploring the real intentions behind assertions we can discover why it is that we have an a priori entitlement to accept that a speaker is being sincere. If we recognise that intending to communicate is intending to transfer belief, then we must recognise that intending to communicate entails sincerity. A hearer is entitled to accept that an assertion which is explicitly offered as communication is in fact sincere. (shrink)

The intuition that knowledge is more valuable than true belief generates the value problem in epistemology. The aim in this paper is to focus on the intuitive notion of knowledge itself, in the context of the value problem, and to attempt to bring out just what it is that we intuitively judge to be valuable. It seems to me that the value problem brings to the fore certain commitments we have to the intuitive notion of knowledge, which, if we take (...) seriously, reveal that we actually think of knowledge as an irreducible factive mental state. (shrink)

Whilst much has been said about the implications of predictive processing for our scientific understanding of cognition, there has been comparatively little discussion of how this new paradigm fits with our everyday understanding of the mind, i.e. folk psychology. This paper aims to assess the relationship between folk psychology and predictive processing, which will first require making a distinction between two ways of understanding folk psychology: as propositional attitude psychology and as a broader folk psychological discourse. It will be argued (...) that folk psychology in this broader sense is compatible with predictive processing, despite the fact that there is an apparent incompatibility between predictive processing and a literalist interpretation of propositional attitude psychology. The distinction between these two kinds of folk psychology allows us to accept that our scientific usage of folk concepts requires revision, whilst rejecting the suggestion that we should eliminate folk psychology entirely. (shrink)

Three experiments investigated response times for remember and know responses in recognition memory. RTs to remember responses were faster than RTs to know responses, regardless of whether the remember–know decision was preceded by an old/new decision or was made without a preceding old/new decision . The finding of faster RTs for R responses was also found when remember–know decisions were made retrospectively. These findings are inconsistent with dual-process models of recognition memory, which predict that recollection is slower and more effortful (...) than familiarity. Word frequency did not influence RTs, but remember responses were faster for words than for nonwords. We argue that the difference in RTs to remember and know responses reflects the time taken to make old/new decisions on the basis of the type of information activated at test. (shrink)

Mechanistic explanation involves the attribution of functions to both mechanisms and their component parts, and function attribution plays a central role in the individuation of mechanisms. Our aim in this paper is to investigate the impact of a perspectival view of function attribution for the broader mechanist project, and specifically for realism about mechanistic hierarchies. We argue that, contrary to the claims of function perspectivalists such as Craver, one cannot endorse both function perspectivalism and mechanistic hierarchy realism: if functions are (...) perspectival, then so are the levels of a mechanistic hierarchy. We illustrate this argument with an example from recent neuroscience, where the mechanism responsible for the phenomenon of ephaptic coupling cross-cuts the more familiar mechanism for synaptic firing. Finally, we consider what kind of structure there is left to be realist about for the function perspectivalist. (shrink)

Imagine a future in which a country’s government is thinking about whether to pursue human enhancement. There are several ways that humans might be enhanced, among them physical aids, pharmaceutical interventions, and genetic modification. In this imagined scenario...

This chapter draws an analogy between computing mechanisms and autopoietic systems, focusing on the non-representational status of both kinds of system (computational and autopoietic). It will be argued that the role played by input and output components in a computing mechanism closely resembles the relationship between an autopoietic system and its environment, and in this sense differs from the classical understanding of inputs and outputs. The analogy helps to make sense of why we should think of computing mechanisms as non-representational, (...) and might also facilitate reconciliation between computational and autopoietic/enactive approaches to the study of cognition. (shrink)

A common complaint among those involved in teaching the educational foundations is the reluctance of many trainee teachers to engage in issues of educational theory. This is particularly apparent with those trainees who are more concerned with managing classrooms of children than grappling with what are often abstract and difficult ideas. This paper considers the current use of educational stories as a pedagogical strategy in teacher training, and a story that has been used in this way is presented. It is (...) argued that teachers of the educational foundations disciplines can, via stories, appeal to the opposing tensions and schemata in students’ own minds, and this engagement can be enhanced when students are confronted with broader educational debates, perspectives and proposals. Stories provide abstract concepts with a necessary tension, they suggest a way of entering the theoretical via the concrete and they show students the personal relevance of certain debates, which may have previously appeared remote and obscure. The end result is that students are challenged to make decisions about matters of fundamental importance such as the kinds of teachers they will be and about the ethical commitment they will make to teaching. (shrink)

To the Socratic injunction ‘Know Thyself’ one wonders how to respond. Presumably Socrates is asking us to attempt a project at which we are supposed to have some chance of success and this leads one to ask ‘ Can I know myself?’ One is led to ask it, but the question can seem rhetorical. Many would reply that of course one can do this because there is nothing easier for me to know than my own self. I do, therefore I (...) can. I know it simply by being myself. Not only this, one might regard knowledge of oneself as unavoidable so that the answer to the question ‘Can I know myself?’ is ‘Yes’ and the answer to the question ‘Can I avoid knowing myself?’ is ‘No’. Now if we cannot avoid knowing ourselves, if Socrates is asking us to do somethingwhich we inevitably do anyway, then he has certainly earned his reputation for irony. (shrink)

IntroductionIn prior studies conducted in the United States, parents’ gender-differentiated encouragement of science predicted children’s later science motivation. Most of this research has focused on older children or teens and only looked at the impact of mothers. However, accumulating evidence suggests that gender-differentiated encouragement of science interest may begin in early childhood. Moreover, fathers may be more likely than mothers to treat sons and daughters differently in science-learning contexts.MethodsWe examined 50 United States families with both a mother and a father (...) and either a daughter or a son. On separate visits, each parent reads two books with their child. One was about life science and the other was about physical science. We coded parents’ science-related talk during these interactions.Results and ConclusionIn contrast to our predictions, parents used higher proportions of science talk with daughters than sons, including higher average rates of overall science talk and specific types of science talk. Moreover, most of the child gender effects occurred while reading the physical science books. Book topic and parent gender moderated some additional patterns. Book reading is discussed as a potential context for mitigating socialization experiences that traditionally disfavor girls’ interest in physical science. (shrink)

Discover the power of loving your (Im)perfect self in an (Im)perfect world. This book dares you to experience the liberation, healing, and empowerment that come when you make a spiritual practice out of learning to love yourself. The Self-Love Superpower shares specific, hands-on action steps designed to support your journey from paralyzing self-criticism to expansive self-adoration. But this journey is a spiral and it is not without its challenges. This book is here to offer you support, personal stories, and encouragement (...) as you create a kindness alarm, conduct a self-care audit, engage in a centering and balancing meditation, heal relationship dynamics, and so much more. Each chapter contains accessible exercises, meditations, rituals, self-care practices, and journaling prompts so you can integrate the information in a experiential way, exploring themes such as: Energetic hygiene, grounding and clearing, body positivity, shielding your energy, boundaries, shadow work, clearing clutter, intuitive eating, chakras, stepping into your truth, feng shui. Whether you want to develop greater respect and belief in yourself, connect with your intuition, or regain a sense of excitement and enthusiasm for the things you care about, this guide provides the empowering boost you need to help you get there. -- back cover. (shrink)

In this essay, I focus on the controversy over privacy regarding Google Street View, a website created in the fall of 2008. I also discuss privacy and its role in technology, enumerating several ways in which privacy policy in these situations should be changed for the better.

While we agree in broad strokes with the characterisation of rationalization as a “useful fiction,” we think that Fiery Cushman's claim remains ambiguous in two crucial respects: the reality of beliefs and desires, that is, the fictional status of folk-psychological entities and the degree to which they should be understood as useful. Our aim is to clarify both points and explicate the rationale of rationalization.

It is generally acknowledged by proponents of ‘new mechanism’ that mechanistic explanation involves adopting a perspective, but there is less agreement on how we should understand this perspective-taking or what its implications are for practising science. This paper examines the perspectival nature of mechanistic explanation through the lens of the ‘mechanistic stance’, which falls somewhere between Dennett’s more familiar physical and design stance. We argue this approach implies three distinct and significant ways in which mechanistic explanation can be interpreted as (...) perspectival: ‘phenomenon perspectivism’, ‘pattern perspectivism’ and ‘hierarchy perspectivism’. We evaluate the strength of the perspective-dependency implied by each of these, and along the way, discuss their significance for wider debates within the new mechanism literature, such as the nature of function attribution and an ontic vs epistemic understanding of explanation. (shrink)

The advent of novel assisted reproductive technologies has considerably expanded our sphere of control over our reproduction, and consequently, the scope of ethical debate surrounding reproductive choice. The widespread availability of genetic selection, in particular, raises questions regarding what reproductive choice does and should entail. Preimplantation genetic diagnosis for genetic selection builds on in vitro fertilization. It forces us to confront questions of whether a moral right to reproductive choice extends not only to the decisions whether to have children and (...) how many to have, but also what type of children to have. Traditionally, reproductive choice has been grounded in negative... (shrink)

Individualist ethical analyses in the enhancement debate have often prioritised or only considered the interests and concerns of parents and the future child. The collectivist critique of the human enhancement debate argues that rather than pure individualism, a focus on collectivist, or group-level ethical considerations is needed for balanced ethical analysis of specific enhancement interventions. Here, I defend this argument for the insufficiency of pure individualism. However, existing collectivist analyses tend to take a negative approach that hinders them from adequately (...) contributing to balanced ethical analysis, and often leads to a prohibitive stance. I argue this is due to two common problems with collectivist analyses: inappropriate acceptance of individualist assumptions, and failure to appropriately weigh individual vs collective ethical considerations. To further develop the collectivist critique in the enhancement debate, I suggest we may look to collectivism in public health ethics, which avoids these problems. (shrink)

As we combat the COVID-19 pandemic, both the prescription of antimicrobials and the use of biocidal agents have increased in many countries. Although these measures can be expected to benefit existing people by, to some extent, mitigating the pandemic's effects, they may threaten long-term well-being of existing and future people, where they contribute to the problem of antimicrobial resistance (AMR). A trade-off dilemma thus presents itself: combat COVID-19 using these measures, or stop using them in order to protect against AMR. (...) Currently, I argue, we are choosing to continue with these measures, and thus to prioritize combatting COVID-19, without adequate ethical reflection on the AMR-associated costs of these measures. I discuss the magnitude of the possible costs and benefits involved in making the trade-off in favour of COVID-19, and their distribution. I highlight two salient aspects of distribution that can help determine whether combatting COVID-19 whilst exacerbating AMR produces justly distributed costs and benefits: distribution between current and future populations, and distribution between existing geographical populations. Adopting this account, I argue that based on the magnitude and distribution of costs and benefits of combatting COVID-19, we have good reason to rethink this trade-off, and instead consider prioritizing protecting current and future people against AMR, but jettisoning measures against COVID-19 that also exacerbate AMR. (shrink)

As we combat the COVID-19 pandemic, both the prescription of antimicrobials and the use of biocidal agents have increased in many countries. Although these measures can be expected to benefit existing people by, to some extent, mitigating the pandemic's effects, they may threaten long-term well-being of existing and future people, where they contribute to the problem of antimicrobial resistance (AMR). A trade-off dilemma thus presents itself: combat COVID-19 using these measures, or stop using them in order to protect against AMR. (...) Currently, I argue, we are choosing to continue with these measures, and thus to prioritize combatting COVID-19, without adequate ethical reflection on the AMR-associated costs of these measures. I discuss the magnitude of the possible costs and benefits involved in making the trade-off in favour of COVID-19, and their distribution. I highlight two salient aspects of distribution that can help determine whether combatting COVID-19 whilst exacerbating AMR produces justly distributed costs and benefits: distribution between current and future populations, and distribution between existing geographical populations. Adopting this account, I argue that based on the magnitude and distribution of costs and benefits of combatting COVID-19, we have good reason to rethink this trade-off, and instead consider prioritizing protecting current and future people against AMR, but jettisoning measures against COVID-19 that also exacerbate AMR. (shrink)

If nations could overcome the mutual fear and distrust whose sombre shadow is now thrown over the world, and could meet with confidence and good will to settle their possible differences, they would easily be able to establish a lasting peace.in an age of empire, hospitality is, in many ways, politically subversive—challenging dominant and prolific racist rhetoric, anti-immigrant fervor, increasing nationalism, and more. Mutual fear and distrust are now commonplace. In what follows, I explore which practices of hospitality can be (...) resistant toward that fear and distrust, and I use a pragmatist-feminist lens to consider hospitality's potential for producing political action and creating new realities.The language of... (shrink)

This paper argues that journalists’ discursive actions in an outbreak context manifest in identifiable rhetorical motifs, which in turn influence the delivery of biomedical information by the media in such a context. Via a critical approach grounded in rhetorical theory, I identified three distinct rhetorical motifs influencing the reportage of health information in the early days of the H1N1 outbreak. A public-health motif was exhibited in texts featuring a particular health official and offering the statements of such an official as (...) a mechanism of reassurance. A concealment-of-information motif was exhibited in texts emphasizing the importance of the transparency of health officials, and in texts demonstrating ambivalence about information provided by socially-sanctioned sources. Finally, in texts mythologizing the outbreak to the exclusion of other functions of the text, I identified a pandemic motif. Each motif differs in the conclusions it offers to audiences seeking to gauge relative levels of risk, and to receive information about protective behaviours. I suggest that one means of interpreting the manifestation of distinct rhetorical motifs in the context of a high-risk health threat is the certainty that this context alters moral responsibilities, consequently influencing the manifestation of narrative role. (shrink)

The free energy principle, an influential framework in computational neuroscience and theoretical neurobiology, starts from the assumption that living systems ensure adaptive exchanges with their environment by minimizing the objective function of variational free energy. Following this premise, it claims to deliver a promising integration of the life sciences. In recent work, Markov blankets, one of the central constructs of the free energy principle, have been applied to resolve debates central to philosophy (such as demarcating the boundaries of the mind). (...) The aim of this paper is twofold. First, we trace the development of Markov blankets starting from their standard application in Bayesian networks, via variational inference, to their use in the literature on active inference. We then identify a persistent confusion in the literature between the formal use of Markov blankets as an epistemic tool for Bayesian inference, and their novel metaphysical use in the free energy framework to demarcate the physical boundary between an agent and its environment. Consequently, we propose to distinguish between “Pearl blankets” to refer to the original epistemic use of Markov blankets and “Friston blankets” to refer to the new metaphysical construct. Second, we use this distinction to critically assess claims resting on the application of Markov blankets to philosophical problems. We suggest that this literature would do well in differentiating between two different research programmes: “inference with a model” and “inference within a model.” Only the latter is capable of doing metaphysical work with Markov blankets, but requires additional philosophical premises and cannot be justified by an appeal to the success of the mathematical framework alone. (shrink)

This paper demonstrates the ontological status of virtue as an instance of love within the cosmology of St. Maximus the Confessor. It shows that we may posit the real existence of a “virtue” in so far as we understand it to have its basis in, and to be an instance of love. Since God is love and the virtues are logoi, it becomes possible and beneficial to parallel the relationship between love and the virtues with Maximus’ exposition of the Logos (...) and the logoi. In particular, Vladimir Cvetković’s interpretation of the circle and radii analogy will be utilized. It will be shown that when one practices a virtue, one is practicing and participating in love, and, by extension, partaking in God. Within the context of Maximus’ cosmology, this means that practicing virtue and love is the ultimate purpose of humanity in its journey to gather all creation to communion with God. This paper is primarily an exposition of primary sources from St. Maximus, but discussion of the ontology of virtue is made with a view to bringing it into dialogue with modern theories of virtue ethics. This paper arises in part as a response to the August 2013 papers by Andrew Louth and Paul M. Blowers on the need for increased scholarship on Maximus and virtue ethics. (shrink)

[book blurb:] The world is changing so fast that it's hard to know how to think about what we ought to do. We barely have time to reflect on how scientific advances will affect our lives before they're upon us. New kinds of dilemma are springing up. Can robots be held responsible for their actions? Will artificial intelligence be able to predict criminal activity? Is the future gender-fluid? Should we strive to become post-human? Should we use drugs to improve our (...) intimate relationships — or to reduce crime? Our intuitions about questions like these are often both weak and confused. -/- David Edmonds has put together a philosophical task force to get to grips with these challenges. Twenty-nine philosophers present provocative and engaging pieces about aspects of life today, and life tomorrow — birth and death, health and medicine, brain and body, personal relationships, wrongdoing and justice, the internet, animals, and the environment. The future won't look the same when you've finished this book. (shrink)

In this paper we will demonstrate that a computational system can meet the criteria for autonomy laid down by classical enactivism. The two criteria that we will focus on are operational closure and structural determinism, and we will show that both can be applied to a basic example of a physically instantiated Turing machine. We will also address the question of precariousness, and briefly suggest that a precarious Turing machine could be designed. Our aim in this paper is to challenge (...) the assumption that computational systems are necessarily heteronomous systems, to try and motivate in enactivism a more nuanced and less rigid conception of computational systems, and to demonstrate to computational theorists that they might find some interesting material within the enactivist tradition, despite its historical hostility towards computationalism. (shrink)

There has been much attention devoted in the last decade and especially in the last few years to Maximus the Confessor?s beliefs concerning sexual difference and its removal. The most important text on this topic is Ambiguum 41. There has been mixed reception of this text, with some scholars advocating that Maximus believes that sexual difference was absent from original human nature and will return to such a state in the eschaton; and other scholars believing that this should be read (...) as a metaphorical absence. This article re-evaluates the text in question and argues that the former position should be maintained. It goes some way to bring together current scholarship on the text and to answers questions that arise from the opposing reading. (shrink)

Actions to prepare for and prevent pandemics are a common topic for bioethical analysis. However, little attention has been paid to global catastrophic biological risks more broadly, including pandemics with artificial origins, the creation of agents for biological warfare, and harmful outcomes of human genome editing. What’s more, international policy discussions often focus on economic arguments for state action, ignoring a key potential set of reasons for states to mitigate global catastrophic biological risks: moral reasons. In this paper, I frame (...) the mitigation of such risks as a global public good, and I explore three possible categories of moral reasons that might motivate states to provide this global public good: nationalism, cosmopolitanism, and interstate obligations. Whilst there are strong objections to moral nationalism as a reason for states to act, moral cosmopolitanism may provide a broad reason which is further supplemented for individual states through the elaboration of interstate moral obligations. The obligations I consider are moral leadership, fairness, and reciprocity. Moral reasons for individual states action may more effectively or more appropriately motivate states to mitigate global catastrophic biological risks. (shrink)

ABSTRACT Shagrir and Sprevak explore the apparent necessity of representation for the individuation of digits in computational systems.1 1 I will first offer a response to Sprevak’s argument that does not mention Shagrir’s original formulation, which was more complex. I then extend my initial response to cover Shagrir’s argument, thus demonstrating that it is possible to individuate digits in non-representational computing mechanisms. I also consider the implications that the non-representational individuation of digits would have for the broader theory of computing (...) mechanisms. 1 The Received View: No Computation without Representation 2 Computing Mechanisms and Functional Individuation 3 Against Computational Externalism 4 Implications for the Mechanistic Account. (shrink)

Nipah virus is a priority pathogen that is receiving increasing attention among scientists and in work on epidemic preparedness. Despite this trend, there has been almost no bioethical work examining ethical considerations surrounding the epidemiology, prevention, and treatment of Nipah virus or research that has already begun into animal and human vaccines. In this paper, we advance the case for further work on Nipah virus disease in public health ethics due to the distinct issues it raises concerning communication about the (...) modes of transmission, the burdens of public health surveillance, the recent use of stringent public health measures during epidemics, and social or religious norms intersecting with preventive measures. We also advance the case for further work on Nipah virus disease in research ethics, given ethical issues surrounding potential vaccine trials for a high-fatality disease with sporadic spillover events, the different local contexts where trials may occur, and the potential use of unproven therapeutics during outbreaks. Further bioethics work may help to ensure that research and public health interventions for Nipah virus disease are ethically acceptable and more likely to be effective. (shrink)

There are increasing pressures for bioethics to emphasise ‘translation’. Against this backdrop, we defend ‘speculative bioethics’. We explore speculation as an important tool and line of bioethical inquiry. Further, we examine the relationship between speculation and translational bioethics and posit that speculation can support translational work. First, speculative research might be conducted as ethical analysis of contemporary issues through a new lens, in which case it supports translational work. Second, speculation might be a first step prior to translational work on (...) a topic. Finally, speculative bioethics might constitute different content altogether, without translational objectives. For each conception of speculative bioethics, important methodological aspects determine whether it constitutes good bioethics research. We conclude that whether speculative bioethics is compatible with translational bioethics—and to what extent—depends on whether it is being employed as tool or content. Applying standards of impact uniformly across bioethics may inappropriately limit speculative bioethics. (shrink)

There are increasing pressures for bioethics research to have translational purposes. Against this backdrop, we argue in defense of speculative bioethics. We explore methods of speculation and their importance. Further, we examine the relationship between speculative bioethics and translational bioethics and posit that they are not dimorphous enterprises, but often support each other. First, speculative research might be conducted as ethical analysis of contemporary issues through a new lens, in which case it is a means of conducting translational work. Second, (...) speculative bioethics research might be a first step prior to translational work on a topic, in which case speculative bioethics is a necessary requirement for later translational work. Finally, speculative bioethics research might be a separate kind of bioethics altogether, in which case it does not have the same objectives of impact and translation as other bioethics work. For each type of work, important methodological aspects determine whether it constitutes good speculative bioethics research. We conclude that speculative bioethics is multipurpose, and whether it should have a translational dimension—and to what extent—depends on the issue. Applying standards of impact and translation as the gold standard across bioethics may inappropriately limit bioethics, particularly on emerging technologies. (shrink)

This paper offers an overview of Grace Lee Boggs's community-based and person-centered philosophy and pedagogy, highlighting how education can foster social responsibility and create democratic habits in students, better equipping them to create radical change within their communities. The essay demonstrates Boggs's commitment to philosophical-activist pedagogy and its alignment with a feminist-pragmatist approach, which emphasizes lived experience, pluralism, complexity, and equality, as well as praxis. The essay then considers how Boggs's philosophical activism can be enacted inside and outside the traditional (...) classroom, concluding by describing an educational and activist project called Narrative 4. (shrink)

This essay invites a recovery of "wildness" as a way for philosophers to respond to the present moment which includes: an ongoing global pandemic, economic uncertainty, increasing cultural division, and a crisis in higher education broadly that persistently threatens the status of philosophy programs. Drawing on the American thinkers John William Miller and John Dewey and elaborating on their own philosophical defenses of liberal education, I propose a turn to wildness and freedom in our pedagogies through active and embodied philosophical (...) pedagogy, including field philosophy. I offer two examples of courses that begin to invite wildness into the process of philosophical inquiry. The aim of this essay is to consider how wildness in teaching and learning and in doing philosophy might make philosophy stay alive. -/- . (shrink)

The aim of this paper is to begin developing a version of Gualtiero Piccinini’s mechanistic account of computation that does not need to appeal to any notion of proper functions. The motivation for doing so is a general concern about the role played by proper functions in Piccinini’s account, which will be evaluated in the first part of the paper. I will then propose a potential alternative approach, where computing mechanisms are understood in terms of Carl Craver’s perspectival account of (...) mechanistic functions. According to this approach, the mechanistic function of ‘performing a computation’ can only be attributed relative to an explanatory perspective, but such attributions are nonetheless constrained by the underlying physical structure of the system in question, thus avoiding unlimited pancomputationalism. If successful, this approach would carry with it fewer controversial assumptions than Piccinini’s original account, which requires a robust understanding of proper functions. Insofar as there are outstanding concerns about the status of proper functions, this approach would therefore be more generally acceptable. (shrink)

In this commentary we suggest that asymmetries in reasoning associated with moral judgment do not necessarily invalidate a theory-theory account of naïve psychological reasoning. The asymmetries may reflect a core knowledge assumption that human nature is prosocial, an assumption that heightens vigilance for antisocial dispositions, which in turn leads to differing assumptions about what is the presumed topic of conversation.