Ecologists are challenged by the need to bridge and synthesize different approaches and theories to obtain a coherent understanding of ecosystems in a changing world. Both food web theory and regime shift theory shine light on mechanisms that confer stability to ecosystems, but from different angles. Empirical food web models are developed to analyze how equilibria in real multi-trophic ecosystems are shaped by species interactions, and often include linear functional response terms for simple estimation of interaction strengths from observations. Models (...) of regime shifts focus on qualitative changes of equilibrium points in a slowly changing environment, and typically include non-linear functional response terms. Currently, it is unclear how the stability of an empirical food web model, expressed as the rate of system recovery after a small perturbation, relates to the vulnerability of the ecosystem to collapse. Here, we conduct structural sensitivity analyses of classical consumer-resource models in equilibrium along an environmental gradient. Specifically, we change non-proportional interaction terms into proportional ones, while maintaining the equilibrium biomass densities and material flux rates, to analyze how alternative model formulations shape the stability properties of the equilibria. The results reveal no consistent relationship between the stability of the original models and the proportionalized versions, even though they describe the same biomass values and material flows. We use these findings to critically discuss whether stability analysis of observed equilibria by empirical food web models can provide insight into regime shift dynamics, and highlight the challenge of bridging alternative modelling approaches in ecology and beyond. (shrink)

This contribution is a gentle introduction to so-called dynamic epistemic logics, that can describe how agents change their knowledge and beliefs. We start with a concise introduction to epistemic logic, through the example of one, two and finally three players holding cards; and, mainly for the purpose of motivating the dynamics, we also very summarily introduce the concepts of general and common knowledge. We then pay ample attention to the logic of public announcements, wherein agents change their knowledge as the (...) result of public announcements. One crucial topic in that setting is that of unsuccessful updates: formulas that become false when announced. The Moore-sentences that were already extensively discussed at the conception of epistemic logic in Hintikka’s ‘Knowledge and Belief’ give rise to such unsuccessful updates. After that, we present a few examples of more complex epistemic updates. Our closing observations are on recent developments that link the ‘standard’ topic of belief revision, as in ‘On the Logic of Theory Change: partial meet contraction and revision functions’, by Alchourron et al. , to the dynamic epistemic logics introduced here. (shrink)

_De regimine Christiano_, produced at the height of the great conflict of 1296-1303 between Pope Boniface VIII and Philip the Fair of France, is a detailed and rigorous defence of the papacy’s claim to supremacy even in temporal matters.

The dynamics of single populations up to ecosystems, are often described by one or a set of non-linear ordinary differential equations. In this paper we review the use of bifurcation theory to analyse these non-linear dynamical systems. Bifurcation analysis gives regimes in the parameter space with quantitatively different asymptotic dynamic behaviour of the system. In small-scale systems the underlying models for the populations and their interaction are simple Lotka-Volterra models or more elaborated models with more biological detail. The latter ones (...) are more difficult to analyse, especially when the number of populations is large. Therefore for large-scale systems the Lotka-Volterra equations are still popular despite the limited realism. Various approaches are discussed in which the different time-scale of ecological and evolutionary biological processes are considered together. (shrink)

We introduce a graphical framework for Bayesian inference that is sufficiently general to accommodate not just the standard case but also recent proposals for a theory of quantum Bayesian inference wherein one considers density operators rather than probability distributions as representative of degrees of belief. The diagrammatic framework is stated in the graphical language of symmetric monoidal categories and of compact structures and Frobenius structures therein, in which Bayesian inversion boils down to transposition with respect to an appropriate compact structure. (...) We characterize classical Bayesian inference in terms of a graphical property and demonstrate that our approach eliminates some purely conventional elements that appear in common representations thereof, such as whether degrees of belief are represented by probabilities or entropie quantities. We also introduce a quantum-like calculus wherein the Frobenius structure is noncommutative and show that it can accommodate Leifer's calculus of 'conditional density operators'. The notion of conditional independence is also generalized to our graphical setting and we make some preliminary connections to the theory of Bayesian networks. Finally, we demonstrate how to construct a graphical Bayesian calculus within any dagger compact category. (shrink)

In Democracy and the Claims of Nature, the leading thinkers in the fields of environmental, political, and social theory come together to discuss the tensions and sympathies of democratic ideals and environmental values. The prominent contributors reflect upon where we stand in our understanding of the relationship between democracy and the claims of nature. Democracy and the Claims of Nature bridges the gap between the often competing ideals of the two fields, leading to a greater understanding of each for the (...) other. (shrink)

Hans van Ditmarsch and Barteld Kooi (2008). Semantic results for ontic and epistemic change. In: G. Bonanno, W. van der Hoek and M. Wooldridge (editors). Logic and the Foundations of Game and Decision Theory (LOFT 7). Texts in Logic and Games 3, pp. 87-117, Amsterdam University Press, Amsterdam.

The most important thing to know about this book is that it is mostly not by Rorty. Twenty pages of this small book were transcribed from an audio recording of a public lecture by Rorty including portions of his discussion with the audience, in Turin, Spain, in 2005. A Spanish translation appeared in 2008, followed by this English version in 2011. Jeffrey W. Robbins wrote a foreword, “Richard Rorty: A Philosophical Guide to Talking About Religion,” (vii–xxii). The introduction at the (...) lecture was by Gianni Vattimo (1–5). Rorty’s section is twenty pages long (7–26). By far the largest portion of the book is the conclusion, by G. Elijah Dann, “Philosophy, Religion, and Religious Belief After Rorty” (27–76, including .. (shrink)

One kind of structuralism holds that mathematics is about structures, conceived as a type of abstract entity. Another denies that it is about any distinctively mathematical entities at all—even abstract structures; rather it gives purely general information about what holds of any collection of entities conforming to the axioms of the theory. Of these, pure structuralism is most plausibly taken to enjoy significant advantages over platonism. But in what appears to be its most plausible—modalised—version, even restricted to elementary arithmetic, it (...) requires defence of a very strong possibility claim: that there could be a completed w-sequence of concrete objects. There are very serious epistemological difficulties in the way of providing the requisite defence. (shrink)

The term ur-emotion is proposed to replace basic emotion as a name for the aspects of emotion that underlie perceived similarities of emotion types across cultures and species. The ur- prefix is borrowed from the German on analogy to similar borrowings in textual criticism and musicology. The proposed term ur-emotion is less likely to be interpreted as referring to the entirety of an emotional state than is the term basic emotion. Ur-emotion avoids reductionism by indicating an abstract underlying structure that (...) accounts for similarities between emotions without implying that the differences are unimportant. This article is dedicated to the memory of Bob Solomon, and is framed in terms of his decades-long analysis and critique of the concept of basic emotions. (shrink)

THE PROBLEM OF THE INTERPRETATION OF HAMANN Johann Georg Hamann is an intriguing but poorly known figure in the contemporary intellectual world. Yet this is the man whom Kierkegaard saluted as "Emperor!", whose writings were to have been arranged for publication by none other than Goethe himself, and whom Dilthey numbered among the primordial figures in the rise of modern historical consciousness. There are reasons for the persistence of this general ignorance. Hamann is deep. And, in addition, there is his (...) forbidding style. The readers of Kierkegaard and Dilthey, two other giants who them selves achieved late recognition, have not had to face this kind of imposing obstacle. Not only does Hamann expect his readers to handle themselves in deep water, but to intuit their way between his ideas which bob up like islands with no visible connection between them. Like Kierkegaard too, Hamann has had his troubles with the public. He himself referred to the hope that he would be understood by a "better posterity". In fact only the last few years have seen the printing of some of his more controversial writings, in particular his theories on the nature of human sexuality. (shrink)

In this third lecture, Quine returns to the mentalistic language accompanying perception and wonders to what extent it is physically defensible and respectable. He explains that even at the level of observation sentences we have a device for ascribing perceptual events. There is a bifurcation between physicalistic and mentalistic talk with basic observation sentences as seen in the difference between ‘It is raining’ and ‘Bob perceives that it is raining’. He explains how the relation of perception between humans and objects (...) can fit his physicalistic framework while remaining very disjointed. What holds its disjointed nature together is a trait of a higher order found in the learning process itself. Each class of perceptual events, be they auditory, visual or otherwise, is a class by which a subject can be taught to name the object in question. (shrink)

In his influential book Truth, Paul Horwich deploys a philosophical method focused on linguistic usage, that is, on the function(s) the concept of truth serves in actual discourse. In doing so Horwich eschews abstract metaphysics, arguing that metaphysical or ontological conceptions of truth rest on basic misconceptions. From this description, one might reasonably expect Horwich's book to have drawn inspiration from, or even embodied philosophical pragmatism of some kind. Unfortunately Horwich relies upon Russell's tired caricature of pragmatism about truth (''p' (...) is true if and only if it is useful to believe p' (Ibid., p. 34, p. 47)), and as a result underestimates the challenge it poses to Minimalism. This paper develops a pragmatist critique of minimalism that focuses on the seemingly central, plausibly constitutive role played by the concept of truth in the speech-act of assertion. The critique suggests that Horwich's Minimalism does not and cannot accomplish its stated goal of explaining all of the facts involving truth. Indeed, the kind of thorough-going deflationism sought by Horwich and others (including pragmatist sympathizer Bob Brandom) is incompatible with an adequate account of assertion, and perhaps other concepts (like belief, judgement and inquiry) as well. (shrink)

If Bob and Joe switched minds, but kept the same bodies, who would be Bob and who would be Joe? If time has no beginnning, how could it have reached now? Conundrums provides a basic, quick introduction to some key problems of philosophy by asking concise questions that evoke classical philosophical problems in a striking manner. It is written in a lively, engaging style and promotes critical thinking skills. This pocketbook is intended for introductory philosophy courses and may be used (...) to generate class discussion or for essay assignments. Topics covered include mind and reality, self and others, God, space and time, and life and death. (shrink)

Bob Hale presents a broadly Fregean approach to metaphysics, according to which ontology and modality are mutually dependent upon one another. He argues that facts about what kinds of things exist depend on facts about what is possible. Modal facts are fundamental, and have their basis in the essences of things--not in meanings or concepts.

In this paper, we present several extensions of epistemic logic with update operators modelling public information change. Next to the well-known public announcement operators, we also study public substitution operators. We prove many of the results regarding expressivity and completeness using so-called reduction axioms. We develop a general method for using reduction axioms and apply it to the logics at hand.

Things and Their Place in Theories Our talk of external things, our very notion of things, is just a conceptual apparatus that helps us to foresee and ...

On the neo-Fregean approach to the foundations of mathematics, elementary arithmetic is analytic in the sense that the addition of a principle wliich may be held to IMJ explanatory of the concept of cardinal number to a suitable second-order logical basis suffices for the derivation of its basic laws. This principle, now commonly called Hume's principle, is an example of a Fregean abstraction principle. In this paper, I assume the correctness of the neo-Fregean position on elementary aritlunetic and seek to (...) explain one way in which it may be extended to encompass the theory of real numbers, introducing the reals, by means of suitable further abstraction principles, as ratios of quantities. (shrink)

Here, Bob Hale and Crispin Wright assemble the key writings that lead to their distinctive neo-Fregean approach to the philosophy of mathematics. In addition to fourteen previously published papers, the volume features a new paper on the Julius Caesar problem; a substantial new introduction mapping out the program and the contributions made to it by the various papers; a section explaining which issues most require further attention; and bibliographies of references and further useful sources. It will be recognized as the (...) most powerful presentation yet of a neo-Fregean program. (shrink)

This chapter first talks about LEGO modal epistemology. Modal epistemology has the two parts. Some of it is the study of how one knows that some things are contingent and others necessary. The other part of modal epistemology concerns how much one know about what is contingent and necessary. The chapter then talks about what went wrong with the imagination‐based story. Whatever the story about how one knows what he/she can build, it had better be one that factors in his/her (...) background knowledge, since that is what makes the imagination useful. With working knowledge of those little pieces, one can make judgments about what can and can not be done with them. Crucially, there are various ways to make those judgments. The chapter further focuses on a segment of the LEGO community that might seem a bit fussy: purists. (shrink)

Neoliberalization is a distinctive economic, political, and social project that promotes profit-oriented, market-mediated accumulation as the primary axis of societalization. This might suggest that neoliberalism promotes the primacy of the economic but, since its extension and reproduction require continuing state support and, indeed, involve what Weber called political capitalism, one might also argue that it entails a primacy of the political. To address this paradox, my article offers a baseline definition of neoliberalism and identifies four ideal-typical historical forms thereof; relates (...) neoliberalism to the world market, geopolitics and global governance; disambiguates the primacy of the economic; and addresses the role of the political in promoting neoliberalism and handling its contradictions and crisis-tendencies. It illustrates this exercise in critical theory from the North Atlantic Financial Crisis and how its management has strengthened the neoliberal project, enabled its main promoters and beneficiaries to escape the need to learn from their mistakes, and even enabled them to further enrich themselves. (shrink)

out a visitation and a thorough assessment of his diocese. His predecessor (or rather his friend Benson, the bishop of Gloucester, who during Edward Chandler's decline had managed Durham's affairs) had kept the deanery records in good ...

There isn’t one conversation about animal ethics. Instead, there are several important ones that are scattered across many disciplines. This volume both surveys the field of animal ethics and draws professional philosophers, graduate students, and undergraduates more deeply into the discussions that are happening outside of philosophy departments. To that end, the volume contains more nonphilosophers than philosophers, explicitly inviting scholars from other fields—such as animal science, ecology, economics, psychology, law, environmental science, and applied biology, among others—to bring their own (...) disciplinary resources to bear on matters that affect animals. -/- The Routledge Handbook of Animal Ethics is composed of 44 chapters, all appearing in print here for the first time, and organized into the following six sections: -/- I. Thinking About Animals -/- II. Animal Agriculture and Hunting -/- III. Animal Research and Genetic Engineering -/- IV. Companion Animals -/- V. Wild Animals: Conservation, Management, and Ethics -/- VI. Animal Activism -/- The chapters are brief, and they have been written in a way that is accessible to serious undergraduate students, regardless of their field of study. The volume covers everything from animal cognition to the state of current fisheries, from genetic modification to intersection animal activism. It is a resource designed for anyone interested in the moral issues that emerge from human interactions with animals. (shrink)

In this wide-ranging interview, Bob Jessop discusses the development of, and many of the main themes in, his work over the last fifty years. He explains how he became interested in realism and Marx...

In this paper I combine the dynamic epistemic logic ofGerbrandy (1999) with the probabilistic logic of Fagin and Halpern (1994). The resultis a new probabilistic dynamic epistemic logic, a logic for reasoning aboutprobability, information, and information change that takes higher orderinformation into account. Probabilistic epistemic models are defined, and away to build them for applications is given. Semantics and a proof systemis presented and a number of examples are discussed, including the MontyHall Dilemma.

Two groups of agents, G1 and G2, face a *moral conflict* if G1 has a moral obligation and G2 has a moral obligation, such that these obligations cannot both be fulfilled. We study moral conflicts using a multi-agent deontic logic devised to represent reasoning about sentences like "In the interest of group F of agents, group G of agents ought to see to it that phi". We provide a formal language and a consequentialist semantics. An illustration of our semantics with (...) an analysis of the Prisoner’s Dilemma follows. Next, necessary and sufficient conditions are given for (1) the possibility that a single group of agents faces a moral conflict, for (2) the possibility that two groups of agents face a moral conflict within a single moral code, and for (3) the possibility that two groups of agents face a moral conflict. (shrink)

"The Symons Medal—one of Canada's most prestigious honours—recognizes an individual who has made an exceptional contribution to Canadian life. The 2020 Symons Medal was awarded to Mr. Bob Rae, P.C., C.C., O.Ont, Q.C. Mr. Rae is the 20th Medallist in this series, following a formidable line of recipients. Hon. Rae's lecture is Learning from The Past, Imagining the Future: Reflections from a Political Life. Throughout the address, published in a bilingual book format, he explores such themes as Canada's improbable origins (...) as a nation; post-war emergence onto the global stage; active membership within the United Nations; and the significance of the ever-evolving Canadian constitution—a "living tree document." Welcoming remarks were made by the Honourable Premier Dennis King, while the official response was delivered by the Honourable Roy Romanow, PC, OC, SOM, QC. Hon. Rae is the 2020 recipient in part for his many years of work on humanitarian issues, most recently the Rohingya Refugee crisis, as well as his time focusing on indigenous issues and his decades of public service and teaching. He has always been deeply involved in the political life of Canada—as MP, former premier of Ontario, and interim leader of the federal Liberal Party. The Symons Medal and Lecture Series is named in honour of Professor Thomas H.B. Symons, a long-time supporter of Confederation Centre and a Board Governor. Held each fall, the medal ceremony and its associated lecture offer a national platform for an eminent Canadian to discuss the nation’s current state, shared histories, and future prospects using themes related to their professional pursuits. The award is presented at Confederation Centre of the Arts—Canada’s living monument to Canadian Confederation—in honour of the meetings of the Fathers of Confederation, who first gathered at Province House National Historic Site in the fall of 1864."--. (shrink)

Taking our inspiration from modal correspondence theory, we present the idea of correspondence analysis for many-valued logics. As a benchmark case, we study truth-functional extensions of the Logic of Paradox (LP). First, we characterize each of the possible truth table entries for unary and binary operators that could be added to LP by an inference scheme. Second, we define a class of natural deduction systems on the basis of these characterizing inference schemes and a natural deduction system for LP. Third, (...) we show that each of the resulting natural deduction systems is sound and complete with respect to its particular semantics. (shrink)

In this collection of closely interrelated essays, Robert Young emphasizes the scope of the nineteenth-century debate on 'man's place in nature' at the same time as he engages with the approaches of scholars who write about it. He is critical of the separation of the writing of history from writing about history, historiography, and of the separation of history from politics and ideology, then or now. Dr Young challenges fellow historians for reimposing the very disciplinary boundaries that the nineteenth-century debate (...) showed were in the service of ideological forces in that culture. Rather, he proposes that the full weight of the contending forces should be made apparent and debated openly so that neither nineteenth-century nor contemporary issues about the role of science in culture should be treated in a narrow perspective. (shrink)

According to a rich tradition in philosophy of action, intentional action requires practical knowledge: someone who acts intentionally knows what they are doing while they are doing it. Piñeros Glasscock argues that an anti-luminosity argument, of the sort developed in Williamson, can be readily adapted to provide a reductio of an epistemic condition on intentional action. This paper undertakes a rescue mission on behalf of an epistemic condition on intentional action. We formulate and defend a version of an epistemic condition (...) that is free from any luminosity commitments. While this version of an epistemic condition escapes reductio, it comes with substantive commitments of its own. In particular, we will see that it forces us to deny the existence of any essentially intentional actions. We go on to argue that this consequence should be embraced. On the resulting picture, intentional action is not luminous. But it still entails practical knowledge. (shrink)