This study reveals how human attitudes to the long-term effects of their actions are crucially bound up with their ideas of personal identity. This collection of essays contrasts eastern and western philosophies of concern for the future, and offers some suggestions for their possible reconciliation.

There is a growing consensus in Britain on the importance of character, and on the belief that the virtues that contribute to good character are part of the solution to many of the challenges facing modern society. Parents, teachers and schools understand the need to teach basic moral virtues to pupils, such as honesty, self-control, fairness, and respect, while fostering behaviour associated with such virtues today. However, until recently, the materials required to help deliver this ambition have been missing in (...) Britain. The Knightly Virtues Programme, devised by the Jubilee Centre for Character and Virtues, aims to help solve this challenge. The programme, designed for 9 to 11 year olds, draws on selected classic stories to help teach moral character in schools. This approach has proved to be popular with children and teachers, with more than 5,000 pupils from one hundred schools having participated in the programme so far. Fifty-five of these schools and 3,272 pupils were directly involved in different stages of the research. Based at the University of Birmingham, the Jubilee Centre houses leading academics dedicated to researching the various ways in which good character, which underpins the building blocks of society, can be developed. Recent research from the Centre has shown that the qualities that make up character can be learnt and taught, and suggests that we need a new emphasis on their importance in schools and in professional education. This report from the Centre into the use of classic literature within schools sets out the ways in which the Knightly Virtues Programme is able to develop the virtue literacy of school pupils, and the extent to which an understanding and awareness of good moral character can make positive changes to behaviour. The impact of the programme has been tested using several rigorous research methods, detailed in this report alongside their findings, which provide substantial empirical evidence for the effectiveness of using stories to develop virtue literacy. (shrink)

The aim of the My Character project was to develop a better understanding of how interventions designed to develop character might enhance moral formation and futuremindedness in young people. Futuremindedness can be defined as an individual’s capacity to set goals and make plans to achieve them. Establishing goals requires considerable moral reflection, and the achievement of worthwhile aims requires character traits such as courage and the capacity to delay gratification. The research team developed two new educational interventions – a website (...) and a hard-copy journal – with the specific aim of developing future-mindedness. After development, the website and journal were piloted over a one-year period by over 1,000 11–14 year olds in six schools across England. Various research methods, including group interviews and case studies, were implemented to assess impact. In addition, a pilot RCT was conducted to assess the feasibility of using experimental methods to measure character. The main findings from the research are that: - Students benefit from opportunities in school to think about future-mindedness; this can be successfully taught through character education. - Harnessing new technology, such as the Internet, offers exciting opportunities for character education. - It is beneficial to investigate the impact of new character education resources in order to bring greater clarity about ‘what works’. The most useful approach is a mixed methods one that allows for triangulation of evidence. - It is possible to run RCTs and other experimental research in schools to assess developmental projects of this kind, but applying the method in schools and creating suitable outcome measures present challenges for researchers. - A positive indicator of the success is that five out of the six pilot schools have embedded My Character into their curriculum. In addition, many new schools, both in Britain and internationally, have started to use the website and / or journal. This report describes the research, analyses the impact of My Character and concludes with recommendations for policy makers, practitioners and researchers embarking on similar projects. These recommendations include: i) advocating that schools create space in the curriculum to teach future-mindedness through character education; ii) enhancing traditional character education teaching methods with opportunities brought by Internet technologies; iii) evaluating character education interventions using triangulated evidence drawn from a mixture of research methods. (shrink)

BackgroundStructured, systematic methods to formulate consensus recommendations, such as the Delphi process or nominal group technique, among others, provide the opportunity to harness the knowledge of experts to support clinical decision making in areas of uncertainty. They are widely used in biomedical research, in particular where disease characteristics or resource limitations mean that high-quality evidence generation is difficult. However, poor reporting of methods used to reach a consensus – for example, not clearly explaining the definition of consensus, or not stating (...) how consensus group panellists were selected – can potentially undermine confidence in this type of research and hinder reproducibility. Our objective is therefore to systematically develop a reporting guideline to help the biomedical research and clinical practice community describe the methods or techniques used to reach consensus in a complete, transparent, and consistent manner.MethodsThe ACCORD project will take place in five stages and follow the EQUATOR Network guidance for the development of reporting guidelines. In Stage 1, a multidisciplinary Steering Committee has been established to lead and coordinate the guideline development process. In Stage 2, a systematic literature review will identify evidence on the quality of the reporting of consensus methodology, to obtain potential items for a reporting checklist. In Stage 3, Delphi methodology will be used to reach consensus regarding the checklist items, first among the Steering Committee, and then among a broader Delphi panel comprising participants with a range of expertise, including patient representatives. In Stage 4, the reporting guideline will be finalised in a consensus meeting, along with the production of an Explanation and Elaboration document. In Stage 5, we plan to publish the reporting guideline and E&E document in open-access journals, supported by presentations at appropriate events. Dissemination of the reporting guideline, including a website linked to social media channels, is crucial for the document to be implemented in practice.DiscussionThe ACCORD reporting guideline will provide a set of minimum items that should be reported about methods used to achieve consensus, including approaches ranging from simple unstructured opinion gatherings to highly structured processes. (shrink)

This volume is concerned with the concept of rationality and the interrelations between rationality, belief and desire in the explanation and evaluation of human action. The book is conceived and structured to represent some of the most important general differences of approach to these problems, and also to connect them with problems about the relation of individual to social behaviour which are of central interest to historians, social theorists and economists as well as to philosophers. The essays have all been (...) commissioned for this volume and have not appeared elsewhere. The idea for the book arose from the meetings of philosophers and social scientists sponsored by the Thyssen Foundation, and is therefore a continuation of the informal series begun by C. Hookway and P. Pettit Action and Interpretation. (shrink)

This paper argues that professionals who make boundary-related decisions should be guided by relationship-based practice. In our roles as service users and professionals, drawing from our lived experiences of professional relationships, we argue we need to move away from distance-based practice. This includes understanding the boundary stories and narratives that exist for all of us – including the people we support, other professionals, as well as the organisations and systems within which we work. When we are dealing with professional boundary (...) issues, we should centre relationship-building skills that are central to many other aspects of our work. Skills that foster relationships at all levels – between professionals, service users, and services – need to be revalued. Our final recommendation is to create, develop, and foster safer spaces within and outside of organisations, as well as inter-professionally, for the discussion and exploration of boundary-related issues and practice. We are interested in hearing from those with experiences of being marginalised by boundaries so that they can inform a reshaping of our collective ideas around boundary related practices. To foster relationship-based practices in organisations, we have outlined several recommendations here; however, we recognize that these do not go far enough, and that collective action is needed to inform systemic change. (shrink)

Recent advances in wireless data transmission technology have the potential to revolutionize clinical neuroscience. Today sensing-capable electrical stimulators, known as “bidirectional devices”, are used to acquire chronic brain activity from humans in natural environments. However, with wireless transmission come potential failures in data transmission, and not all available devices correctly account for missing data or provide precise timing for when data losses occur. Our inability to precisely reconstruct time-domain neural signals makes it difficult to apply subsequent neural signal processing techniques (...) and analyses. Here, our goal was to accurately reconstruct time-domain neural signals impacted by data loss during wireless transmission. Towards this end, we developed a method termed Periodic Estimation of Lost Packets. PELP leverages the highly periodic nature of stimulation artifacts to precisely determine when data losses occur. Using simulated stimulation waveforms added to human EEG data, we show that PELP is robust to a range of stimulation waveforms and noise characteristics. Then, we applied PELP to local field potential recordings collected using an implantable, bidirectional DBS platform operating at various telemetry bandwidths. By effectively accounting for the timing of missing data, PELP enables the analysis of neural time series data collected via wireless transmission—a prerequisite for better understanding the brain-behavior relationships underlying neurological and psychiatric disorders. (shrink)

"We often find that the state of not-knowing can be a precursor to moments of rich discovery which possess a dynamic, transformative power that exceeds any prior expectation." From the Introduction In daily life, when we see, hear or touch something that we don't recognise, we are instantly at our most alert. In that condition of 'not-knowing' we are in a state of alive, lithe awareness: asking questions, inviting input, open to learning, looking for significance and meaning... These essays, most (...) by practising psychotherapists, some of them Buddhists, take as their starting point the idea that not-knowing is fundamental to conscious reflection and the desire to know must always arise in the first instance from the self-awareness of not-knowing. Read in any order, on waking, before sleeping or when in doubt... they will be of interest to anyone who has ever sat in either chair in a psychotherapist's or counsellor's room - as well as anyone troubled or intrigued by what it takes to live comfortably and well in a condition of not knowing all (or even any) of the answers. (shrink)

We say that a theory T satisfies arithmetic-is-recursive if any X′-computable model of T has an X-computable copy; that is, the models of T satisfy a sort of jump inversion. We give an example of a...

An oracle A is low-for-speed if it is unable to speed up the computation of a set which is already computable: if a decidable language can be decided in time $t(n)$ using A as an oracle, then it can be decided without an oracle in time $p(t(n))$ for some polynomial p. The existence of a set which is low-for-speed was first shown by Bayer and Slaman who constructed a non-computable computably enumerable set which is low-for-speed. In this paper we answer (...) a question previously raised by Bienvenu and Downey, who asked whether there is a minimal degree which is low-for-speed. The standard method of constructing a set of minimal degree via forcing is incompatible with making the set low-for-speed; but we are able to use an interesting new combination of forcing and full approximation to construct a set which is both of minimal degree and low-for-speed. (shrink)

We explore the better known paradoxes of Zeno including modern variants based on infinite processes, from the point of view of standard, classical analysis, from which there is still much to learn (especially concerning the paradox of division), and then from the viewpoints of non-standard and non-classical analysis (the logic of the latter being intuitionist).The standard, classical or Cantorian notion of the continuum, modeled on the real number line, is well known, as is the definition of motion as the time (...) derivative of distance (we are not concerned with position and motion in more than one dimension, since Zeno wasn't). The real number line consists of its points, the distance between distinct points being positive and finite. The standard, classical derivative relies on the classical notion of limit, which does not use infinitesimals. (shrink)

PREFATORY NOTE T may be well at the outset to say clearly what is the aim of the present volume. The title is Ancient Art and Ritual, but the reader will ...

Infection by a temperate phage can lead to death of the bacterial cell, but sometimes these phages integrate into the bacterial chromosome, offering the potential for a more long-lasting relationship to be established. Here we define three major ecological and evolutionary benefits of temperate phage for bacteria: as agents of horizontal gene transfer, as sources of genetic variation for evolutionary innovation, and as weapons of bacterial competition. We suggest that a coevolutionary perspective is required to understand the roles of temperate (...) phages in bacterial populations. The dual personality of temperate phages – as infectious lytic phages or prophages integrated within the bacterial genome – creates a complex interaction with bacterial hosts. Although potentially lethal, prophages confer a multitude of benefits for the host, suggesting the potential for both conflict and collaboration which must be viewed from a coevolutionary perspective that considers both host and phage fitness interests. (shrink)

There is an argument that government cannot be good for individuals because it causes them to act through fear of punishment, hence for nonmoral reasons. The obvious responses of accepting the conclusion (anarchism) and denying the premiss about moral motivation (utilitarianism) are first considered. Then the strategy of accepting the premiss but denying the conclusion is pursued at greater length. Some arguments of T. H. Green and B. Bosanquet which attempt to do this are considered before an independent resolution is (...) proposed. (shrink)

Interested persons upon learning of the title of the present book, ask what it is all about. I customarily give them a few minutes of explanation, only to be greeted at the end by a perfectly blank stare. I wish a candid camera could have witnessed all these performances. Put end to end they would make for an hour of the most hilarious entertainment. ... Evidently the problem has about it an elusiveness which puts it beyond the reach of most, (...) and the plain man can hardly be blamed for failing to come to grips with it. But what of the professional philosopher? I find myself scandalized by the complete ignorance of most with respect to the very concrete entity of their own nervous systems, and of the Mind/Brain problem along with it. In God's name, how can you approach the great questions of the Cosmos, of the nature of Being and Reality if you haven't first formed a clear idea of what's inside and what's outside, and what part your own Brain plays in supporting your ruminations? (shrink)

An annotated list of online resources for religious studies and philosophy of religion. This was an internal departmental document from the late 1990s. It should never have gone into the public domain. Please don't waste time with it. I am trying to have it removed.

Two general features of metameric patterning in Drosophilaare considered: (1) maintenance of a constant number of metameres (segments or parasegments) in the face of variation in length of the embryo; (2) expression of pattern by on‐off switchings of particular genes, with only three or four rows of cells to each element of pattern. For each of these features, the general strategic question is raised: could reaction‐diffusion theory account for this? In both cases, it is answered affirmatively. For the second feature, (...) this review contains some hitherto unpublished computer simulations by one of us (K. Y. T.), illustrating that a reaction‐diffusion mechanism can be transformed into a patterned switching mechanism by nothing more than compartmenting of the diffusion region. For the scale of three compartments to one pattern repeat unit (representing three rows of cells to a segment) the switching pattern predicted by computation is two‐off to one‐on. This resembles the pattern of expression of the engrailed gene, posteriorly localized in each segment. (shrink)

The paper uses thompson clark's theory of the relation of perceptual parts and wholes to illuminate certain aspects of our knowledge of other minds. The thesis is that the traditional problem can be usefully broken down into two parts--One of which calls for a better understanding of the logic of perceptual concepts; the other, For a closer look at what happens when we try to take the epistemological skeptic seriously.

Introduction: Although deep brain stimulation often improves levodopa-responsive gait symptoms, robust therapies for gait dysfunction from Parkinson's disease remain a major unmet need. Walking speed could represent a simple, integrated tool to assess DBS efficacy but is often not examined systematically or quantitatively during DBS programming. Here we investigate the reliability and functional significance of changes in gait by directional DBS in the subthalamic nucleus.Methods: Nineteen patients underwent unilateral subthalamic nucleus DBS surgery with an eight-contact directional lead in the most (...) severely affected hemisphere. They arrived off dopaminergic medications >12 h preoperatively and for device activation 1 month after surgery. We measured a comfortable walking speed using an instrumented walkway with DBS off and at each of 10 stimulation configurations at the midpoint of the therapeutic window. Repeated measures of ANOVA contrasted preoperative vs. maximum and minimum walking speeds across DBS configurations during device activation. Intraclass correlation coefficients examined walking speed reliability across the four trials within each DBS configuration. We also investigated whether changes in walking speed related to modification of step length vs. cadence with a one-sample t-test.Results: Mean comfortable walking speed improved significantly with DBS on vs. both DBS off and minimum speeds with DBS on. Pairwise comparisons showed no significant difference between DBS off and minimum comfortable walking speed with DBS on. Intraclass correlations were ≥0.949 within each condition. Changes in comfortable walk speed were conferred primarily by changes in step length.Conclusion: Acute assessment of walking speed is a reliable, clinically meaningful measure of gait function during DBS activation. Directional and circular unilateral subthalamic DBS in appropriate configurations elicit acute and clinically significant improvements in gait dysfunction related to PD. Next-generation directional DBS technologies have significant potential to enhance gait by individually tailoring stimulation parameters to optimize efficacy. (shrink)

In CQ 55 , 22–5, E. Harrison noticed that hiatus between verses in the trimeters of dialogue was much less frequent in tragedy when the sense ran on from one verse to the next, than when there was a pause in sense at verse-end. He observed that Aeschylus' Prometheus differed from the other plays of Aeschylus in this respect, the proportion of run-over hiatus to end-stopped hiatus being much higher, and more like that of comedy; that Sophocles had remarkably (...) few verses with run-over hiatus in the Trachiniae and Antigone , much less than Aeschylus in proportion to the number of non-stop trimeters in the play, though Oedipus Tyrannus had much the largest number in Sophocles , and no continuous chronological development was discernible; that in Euripides there was a general progression from relative strictness to relative freedom in the run-over hiatus allowed, though individual plays did not conform closely to this pattern; that in general comedy was freer than tragedy. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:141. ON HARRISON'S INTERPRETATION OF TREATISE III ii 1 In Treatise III ii 1, Hume is concerned to argue that justice is an artificial virtue, not a natural one. Commenting on this Section, Jonathan Harrison has pointed out that, on his reading and interpretation, Hume's argument runs into many difficulties. I shall argue in this paper that a more sympathetic reading of Hume will show that his (...) argument is a whole lot more plausible than Harrison takes it to be. Harrison raises many separate points, but instead of taking up these points one by one, I shall concentrate on one that seems to be most serious, and to lie at the heart of his criticism. The point is as follows. Hume's argument, designed to prove that justice is an artificial virtue as opposed to natural, proves too much: '(It) proves that justice is not a virtue at all' (HTJ 6). According to Harrison, Hume's first premise is [1] That actions are not duties unless there is in the mind of man a motive which normally prompts him to perform them, and the second premise is [2] That there is in the mind of man no motive which normally prompts him to perform just actions ( ibid. ) Harrison goes on to argue that we can derive from these two premises the 'embarrassing conclusion' that 'it cannot be a duty to perform just actions,' or that 'justice is not a virtue at all.' If Hume did indeed assert [1] and [2], the embarrassing conclusion would seem to follow. I shall argue that there is more than meets the eye as regards [1], and that Hume does not assert [2], 142. It would appear that in attributing [1] to Hume, Harrison has the following passage in mind: (It) may be establish'd as an undoubted maxim, that no action can be virtuous, or morally good, unless there be in human nature some motive to produce it, distinct from the sense of its morality (T 479). As I interpret this passage, the main point of the maxim is that the virtuousness of an action resides not in the sense of the morality of the action, as this is clearly circular, but in some other motive. This maxim does imply [1] above provided that we take Harrison's 'actions are not duties' to mean 'actions are not virtuous,' and his 'motive' to mean 'motive other than a sense of duty or morality.' In general, however, Harrison's way of rendering the passage above is quite unsatisfactory because it obscures what Hume means by 'duty' and what for Hume renders an action virtuous. To clarify matters, we need to look more closely at Hume's maxim. The first thing to note is that, while it is not clear what Harrison means by 'motive, ' Hume clearly uses the term 'motive' to mean 'passion.' Hume talks about 'the motives that produced' actions (T 477, my emphasis). Given Hume's psychology of actions, it is obvious that Hume is talking about the passions that produced actions. The sense of morality or duty, or the moral sentiment, is itself a passion which is capable of producing actions, and can do so 'without any other motive' (T 479). However, what Hume stresses in the passage above is that it is not the sense of duty that gives an action a good moral character, but some other motive, or passion. Hume is saying that the sense of duty is a derivative passion: an action has to 143, be established as virtuous in the first place for there to be a sense of duty concerning that action, or a sense of its morality; and it has to be so established by some other motive of which the sense of duty can be said to be derivative. Hume spells this out explicitly when he talks about humane actions. Thus, it is the humanity that 'bestows a merit on the actions' (T 478), not a regard to this merit, or a sense of duty concerning the actions, which is 'deriv'd from the antecedent principle of humanity' ( ibid., my emphasis). Now a sense of duty or obligation has to be distinguished from... (shrink)

Millikan's famous oil drop experiment is scrutinized from the viewpoint of the methodological dicta of the credibility revolution.

Millikan's famous oil drop experiment is scrutinized from the viewpoint of the methodological dicta of the credibility revolution.

This work is designed to answer both sceptical attacks on knowledge and epistemological relativism implied in the sceptic’s position. Rather than following the traditional path of developing a foundations picture along either rationalist or empiricist lines, Harrison turns to the resources of pure reason alone to repel the sceptic’s attacks and to find that about which we can be certain. Since the sceptic’s arguments "have been produced by reason, it is important if reason is going to be considered trustworthy (...) that they can also be answered by reason." Harrison’s thesis is that by reason alone "standards that judgments have to match up to if they are going to be thought of as judgments about the world" can be found. Such standards can be produced by an "inquiry into the essential conditions of our world being a comprehensible world.". (shrink)

A commentary on the arguments whereby Hume endeavored to delimit the role of reason in morality. Harrison’s procedure is largely one of logical analysis: he identifies individual arguments, examines inferences, asks whether there are reasons to believe premises. Throughout, he displays a balanced, appreciative approach, and when obliged to draw attention to Hume’s mistakes, he does so only reluctantly. Over half of the book is taken up in a careful examination of the text which, in terms of clarity and (...) penetration, goes beyond previous studies of Hume’s ethics. Additionally, Harrison offers chapters on Hume’s general epistemology and on the classical is/ought passage. In the latter he declares that Hume quite obviously thought that the derivation of an ought from an is was impossible, and then goes on, in what he labels an independent treatment of the problem, to offer a subtle exploration on the contours of our usage of the language of evaluation and obligation. But perhaps the most valuable contribution of the book is the closing section in which Harrison endeavors to arrive at a depiction of Hume’s alternative to rationalism. He puts forward five distinct interpretations of Hume’s positive moral philosophy, each of which has textual support as well as its own advocates. Harrison finds no grounds for affirming that any one of these interpretations defeats the others. Concluding with the judgment that Hume was confused in expounding his own position, the author notes that "Hume himself would not have approved of a reverence which substituted a superficial acceptance for a thorough grasp and realistic appraisal of his opinions." Despite the opposition which his work may provoke from those who defend some single interpretation of Hume’s moral philosophy, Harrison’s study may be expected to become a standard reference work on Hume’s ethics.—J.T.K. (shrink)

This work is an introductory textbook for deductive logic being primarily concerned with truth-functional logic, but also containing an introduction to syllogisms with the application of Venn diagrams, an introduction to quantification theory, and a brief discussion of axiom systems. Harrison employs six logical operators in his truth-functional calculus, including both inclusive and exclusive disjunction. The six operators are initially defined by truth tables, but in the natural deduction presentation negation and conjunction are taken as primitive and the other (...) connectives are defined in terms of these two. The conditional and indirect methods of proof are included with the approach being essentially the same as that given in Copi’s Symbolic Logic. Categorical statements and syllogisms are analyzed from both hypothetical and existential viewpoints. The treatment of quantification theory includes two-place predicates and employs the four standard rules for generalization and instantiation. The book contains an abundance of explanations, examples, and exercises. Selected answers, usually for the odd numbered problems, are given in an appendix.—T. G. N. (shrink)

In the 1970s, R.D. MacElroy coined the term ‘extremophile’ to describe microorganisms that thrive under extreme conditions (MacElroy 1974). This hybrid word transliterates to ‘love of extremes’ and has been studied as a straightforward concept for the past 40 years. In this paper, we discuss several ways the term has been understood in the scientific literature, each of which has different consequences for the distribution and importance of extremophiles. They are, briefly, Human-Centric, at the Edge of life’s habitation of Morphospace, (...) by appeal to Statistical Rarity, described by Objective Limits, and at the Limits of Impossibility for metabolic processes. Importantly, these concepts have co-existed, unacknowledged and conflated, for decades. Confusion and equivocation threaten to follow from the wildly varied inclusion or exclusion of organisms as extremophiles depending on the concept used. Under some conceptions, entire kinds of extremophiles become meaningless. Since our understanding of how life works is shaped by what we take to be its extremes, clarifying extremophily is key for many large-scale projects in biology, ecology, biotechnology and astrobiology. In what follows, we proceed as if a noncontroversial account of life is possible and that it is possible to find complex chemistry in the Universe that is similar enough to Life on Earth such that both may be considered instances of ‘life’ (but see Mariscal & Doolittle 2018). We raise, but do not address, the questions of whether the distribution of Life on Earth is representative of what we may find elsewhere in the Universe, whether the same kinds of extremophiles would exist given a replay of the tape of life. Additionally, each of these concepts assumes life based on some sort of biochemistry in this universe, effectively setting aside claims made by some artificial life proponents that their digital organisms are genuine examples of life (Langton 1989, Ray 1995). On the distinction between extremophilic and extremotolerant, we note that all accounts accept the latter as a broader category than the former, since ‘phily’ means love and tolerance is a prerequisite for love under any conception. Indeed, there will be many extremely impoverished environments where tolerance is the only option and thriving is precluded, e.g. Bacillus marismortui was extracted and grown from 250-million-year-old salt crystals in the Permian Salado Formation in an inactive yet persistent state (Vreeland et al., 2000). We also note that extremophily, as a functional category, is potentially applicable at many levels of the biological hierarchy. Extremophily at one level does not necessarily extend to higher and lower levels. For instance, a microorganism in isolation might be quite intolerant to certain environmental conditions yet flourish when subjected to the same conditions as a community or natural biofilm. Alternatively, a protein molecule might be quite stable or active under certain conditions even if the optimal environment for the organism containing it is far more mesophilic. There is an industry of artificially selecting organisms and proteins to adapt to extreme environments (see van den Burg & Eijsink 2002), providing some justification to consider ‘functioning at extremes’ as a worthwhile category of investigation. Finally, we also note certain physico-chemical ranges are rarely considered with respect to extremophily – timespan, size, nutrient availability (Hoehler & Jørgensen 2013), etc. – as well as some biological parameters – abundance, isolation, competition, etc. Perhaps scientific interest must also come into play as to the reason these criteria are not considered relevant. We return to this issue later. In the next section, we give five definitions of extremophily, show their benefits, drawbacks, and unintended yet unavoidable consequences. These arguments are summarized in Table 1 and represented visually in Figures 1 and 2. Given research on polyextremophiles, it seems Figure 2 is a more plausible representation of the state of current knowledge than Figure 1 (Harrison et al. 2013). Life is patchily distributed across various dimensions, which may reflect its contingent history, poor sampling, or (perhaps) fundamental limits. Figure 3 shows the conceptual flowchart for all of these views. In the following section, we take a step back to ask whether we should choose between these definitions and how such a judgment could be made. We argue for a limited pluralism, in which some, but not all, of the concepts are acceptable relative to certain practical and theoretical aims. (shrink)