Since antiquity, philosophers have investigated how change works. If a thing moves from one state to another, when exactly does it start to be in its new state, and when does it cease to be in its former one? In the late Middle Ages, the "problem of the instant of change" was subject to considerable debate and gave rise to sophisticated theories; it became popular and controversial again in the second half of the twentieth century. The studies (...) collected here constitute the first attempt at tackling the different aspects of an issue that, until now have been the object of seminal but isolated forays. They do so in through a historical perspective, offering both the medieval and the contemporary viewpoints. (shrink)

This anthology concerns limit-decision problems, chiefly as treated in the fourteenth-century Latin West. A central problem taken up concerns the instant of change: in a change from ø to not-ø such that before instant t there is ø and after t not-ø, at t is there ø, or not-ø, or neither, or both? For medieval thinkers, the answer often depended on what kind of item was at issue. They standardly distinguished permanent items, the whole of which (...) exists simultaneously, from successive items, whose parts are non-simultaneous, and gave different type or type answers in the two cases.The papers in... (shrink)

Ockham’s approach to the problem of the instant of change as it is found in the Summa logicae i, chapter 5, and ii, chapter 19, is usually described as “purely logical,” narrowing the treatment of “begins” and “ceases” to simplistic cases. The aim of this paper is to complement our knowledge of Ockham’s position on the problem of the instant of change by analysing the treatment of the problem he gives in his questions on the Physics (...) 98-101. In these passages, Ockham adopts a “physical approach” in order to deal with problems related to the continuity of alteration and the production of the form of the mix from elementary qualities. To solve these problems, he is compelled to give up one of the most important claims at the basis of the logical approach that he adopted in the Summa logicae, namely that the distinction between permanent and successive entities is not relevant in the assignment of truth-conditions to propositions containing the aspectual verbs “beginning” and “ceasing.”. (shrink)

Instantaneous changes may well be thought to give rise to contradiction. If one endorses an explosive logic, where contradictions entail everything, this is entirely unacceptable. However, if one deploys a paraconsistent logic, which keeps contradictions under control, one may give perfectly coherent and precise models of such changes. In In Contradiction the author showed how and he explored the philosophical implications of the model. Here, the author revisits the issue in the light of a recent critique by Greg Littmann.

Most people in the United States agree they want some income inequality but debate exactly how much is fair. High‐status people generally prefer more inequality than low‐status individuals. Here we examine how much preferences for inequality are (or are not) driven by self‐interest. Past work has generally investigated this idea in two ways: The first is by stratifying preferences by income, and the second is by randomly assigning financial status within lab‐constructed scenarios. In this paper, we develop a method that (...) combines both experimental control and the social experience of inequality—a simulated society experiment. Across two experiments (N = 138, observations = 690), participants voted on the distribution of rewards—first behind a veil of ignorance, and then when they were randomly assigned a status within a game of chance. Status varied repeatedly across five rounds, allowing us to measure dynamic preferences. Under the veil of ignorance, people preferred inequality favoring the top status. When the veil of ignorance disappeared, self‐interest immediately influenced inequality preferences. Those who randomly landed in top positions were satisfied with the status quo established under the veil of ignorance, whereas those who randomly landed in bottom positions wanted more equality. Yet these preferences were not stable; decisions about the optimal level of inequality changed according to changes in social status. Our results also showed that, when inequality grows in a society, preferences regarding inequality become polarized by social status. Individuals in low‐status positions, particularly, tend to demand more equality. (shrink)

If something changes from being in one state to being in another state, when exactly does it change? And what’s going on at that time? These questions are often discussed under the heading of the ‘moment’ or ‘instant’ of change. In this paper, I will investigate a view on which there is an intrinsically distinguished, atomic time at which something changes, and at that time it is metaphysically indeterminate what is the case. The background metaphysical picture is (...) situationalism, a theory on which reality is composed of irreducibly conflicting parts. These conflicting parts give rise to unsettledness in reality as a whole, and also at the point of change. I propose this view as a competitor for existing accounts of the time of change, and spell out a few reasons in its favour. (shrink)

When do things change? When do things have some characteristics? I try to answer these questions by looking at different solutions Plato and Aristotle presented in their works. The famous analysis of change from the second half of Plato’s Parmenides claims that change happens outside of time, at an “instant”. On the contrary, Aristotle in the Physics explicitly argues that all change occurs only in time. However, both Plato and Aristotle also provide other analyses of (...) change. How to deal with this variety of explanations and tensions between them? In this paper, I argue that if we differentiate between several kinds of change, most of Plato’s and Aristotle’s analyses provide a thorough insight into the nature of change. For processes such as locomotion, change occurs exclusively within time. For changes where both the initial and final states occur only in time, such as a transition from motion to rest, change takes place in the ‘now’. However, for changes where both the initial and final states occur in both time and in the ‘now’ – for example, a qualitative change from being white to not being white – change does not occur in time nor in the ‘now’, but instead happens instantaneously. (shrink)

Hugh of Novocastro, Landolfo Caracciolo, John Baconthorpe, and some other medieval authors argued that there are real contradictions in nature. The background of this early fourteenth-century theory was the Aristotelian question of how to determine the instant of change between p and ~p. The argument was that these are simultaneously true at the temporal instant of change if it is an instant of changing. The author’s aim is to discuss the background of this view in (...) Henry of Ghent’s theory of instantaneous change from potentiality to actuality at that very instant. (shrink)

In this essay, I first set out the principles of change, paying particular attention to the need for a support for all changes and to the need for prime matter. I then discuss the nature of time, arguing that time is not actually composed of durationless instants but that instants can be understood as limits to an infinite process of potential division. I then give a definition of instants in terms of intervals and propose a way of modeling them. (...) In the next section I bring together the two previous sections by explaining change as an instantaneous process that does not involve actual instants. In the final section I draw out a larger metaphysical moral that emphasizes the role of potentiality and sees the potentiality in change and the potentiality in time as but different aspects of the same radical potentiality in nature. (shrink)

When we think of Sartre's proposal for a theory of alterity in Being and Nothingness, our attention often turns to his famous and original analysis of “the look of the other”. The moment when Sartre presents this analysis in his work is characterised by the author's effort to escape from the problem of solipsism, and the development of a “phenomenology of the look” is presented as a decisive response to the problem. However, Sartre's critics have shown how problematic this response (...) is, insofar as it favours the “being-seeing” - a dimension acquired through a metamorphosis that the look of the other is capable of provoking in the subject - as what would guarantee an effective relationship of otherness. In this work, I try to return to these criticisms in order to highlight their limits, and then change the focus, bringing to the fore the "backstage" of the look that directs us towards a way out of solipsism. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Images >> Quan Zhou Wu and Linaje’s GenealogyJulia Haeyoon Chang (bio) Click for larger view View full resolutionQuan Zhou WuENJOY (Linaje 2024)Art and design by Quan Zhou WuDigital infrastructure by Marco Fratini[End Page 5] Click for larger view View full resolutionQuan Zhou WuUNA DE ELLAS (Linaje 2024)Art and design by Quan ZhouWu Digital infrastructure by Marco Fratini[End Page 6] Click for larger view View full resolutionQuan Zhou WuMEMORIAS RETORCIDAS(Linaje (...) 2024)Art and design by Quan Zhou WuDigital infrastructure by Marco Fratini[End Page 30] Click for larger view View full resolutionQuan Zhou Wu,NEGATIVOS (Linaje 2024)Art and design by Quan Zhou WuDigital infrastructure by Marco Fratini[End Page 31] Click for larger view View full resolutionQuan Zhou WuELLAS Y YO (Linaje 2024)Art and design by Quan Zhou WuDigital infrastructure by Marco Fratini[End Page 49] Click for larger view View full resolutionQuan Zhou Wu,STATEMENT (Linaje 2024)Art and design by Quan Zhou WuDigital infrastructure by Marco Fratini[End Page 74] Click for larger view View full resolutionQuan Zhou WuLAS ARTISTAS QUE NO FUIMOS (Linaje 2024)Art and design by Quan Zhou WuDigital infrastructure by Marco Fratini[End Page 75]Quan Zhou Wu’s followers will surely be struck—as I was—by the multisensory digital exhibit “Linaje” (“Lineage”), which was published in 2024 and departs, perhaps unexpectedly, from the artist’s previous well-established oeuvre. Before delving into the work in question, it may be fruitful first to have a glimpse at the artist’s iconic aesthetic. In 2015, and at the age of twenty-seven, Wu, a self-taught artist, debuted her first graphic memoir, Gazpacho Agridulce. The book commences with her parents’ newfound life in Spain after leaving Qingtian, a province of Zhejiang, China, to run a restaurant in Algeciras, a municipality of Cadiz. The opening pages of Gazpacho pack a punch, depicting Wu’s dramatic and untimely birth in a taxicab en route to the hospital.Gazpacho’s publication initiated a crucial sea change in the predominantly white Spanish publishing world, which would soon after be rocked by a boom of racialized1 authors penning anti-racist memoirs and other works of non-fiction.2 Gazpacho would also eventually become the first of the author’s trilogy of graphic memoirs, which was completed by the sequels Andaluchinas por el mundo (2017) and the most recent La agridolce vita (2023).Wu’s narratives capture the familial, identarian, and social conflicts that erupt from cultural disloyalties and racism—direct consequences of migration. She and her sisters, for example, loathe their family’s rigid Chinese and Christian mores and long for the cultural markers of an ordinary Spanish childhood, structured of course by U.S. global consumer culture, e.g. Barbie, Pizza Hut, and McDonald’s.An illustrator, cartoonist, and podcaster, Wu’s talent as a storyteller lies in her complex use of humor. With great care for her subject and her reader, Wu deploys humor to tend to the uncouth, raw, and ugly parts of life. In so doing, the author invites us to laugh and ultimately reckon with our own discomfort as we with sit with the heaviness of racism, sexism, and post-migration melancholy—using humor as a salve.At her best, Wu serves irreverence, rawness, and wit. To be immersed in her books is to rub up against the rough-hewn emotions that bring her characters to life. The vibrancy of her palette and the whimsy of her pen strokes are inviting, animated, and deceptively light-hearted. In an instant, lines and pigment rearrange into abstractions dense with affect. Fiery hollowed eyes, a gaping mouth, and flushed skin burn through the frame—making the volcanic rage of a migrant mother immediately palpable. It’s so emotive, it practically singes your skin. Click for larger view View full resolutionFigure 1.Cover of Wu’s first graphic memoir Gazpacho agridulce: Una autobiografía china-andaluza[End Page 102] Click for larger view View full resolutionFigure 2.Excerpt from Gazpacho agridulce (courtesy of the artist)[End Page 103]While... (shrink)

Alain Badiou and Slavoj Žižek together have emerged as two of Europe’s most significant living philosophers. In a shared spirit of resistance to global capitalism, both are committed to bringing philosophical reflection to bear upon present-day political circumstances. These thinkers are especially interested in asking what consequences the supposed twentieth-century demise of communism entails for leftist political theory in the early twenty-first century. _ Badiou, Žižek, and Political Transformations_ examines Badiouian and Žižekian depictions of change, particularly as deployed at (...) the intersection of philosophy and politics. The book details the origins of Badiou’s concept of the event and Žižek’s concept of the act as related theoretical visions of revolutionary happenings, delineating a number of difficulties arising from these similar concepts. Johnston finds that Badiou and Žižek tend to favor models of transformation that risk discouraging in advance precisely the efforts at changing the world of today that these uncompromising leftists so ardently desire. _Badiou, Žižek, and Political Transformations_ will surely join Johnston’s _Žižek’s Ontology _as an instant classic in its field. (shrink)

When an event occurs which involves a change from a state ϕ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\phi $$\end{document} to a state not-ϕ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\phi $$\end{document}, when does the change occur? This is known in the philosophical literature as the problem of the moment of change. I discuss a puzzle based on this problem raised by Sextus Empiricus in Against the Physicists. I compare two lines of solution, (...) one provided by Hans Kamp’s work on the logic of change and the other inspired by Aristotle’s claim that change cannot happen at an instant. I end with a discussion of these solutions vis-à-vis the account of cessation implicatures proposed by Altshuler and Schwarzschild. (shrink)

ObjectiveTo investigate the instant impact of hemodialysis on the cerebral morphological measurements of patients with end-stage renal disease.Materials and methodsTwenty-five patients undergoing maintenance HD and twenty-eight age-, sex-, and education-matched healthy control were included. The HD group and HC group had 3D high-resolution structural magnetic resonance imaging scans twice and once, respectively. Both groups underwent neuropsychologic tests. The morphological measurements of structural MRI were measured using CAT12 and these measures were compared among three groups. The relationship between morphological measures (...) and clinical parameters and neuropsychological tests were investigated through multiple regression analysis.ResultsCompared to the HC group, the cortical thickness before HD significantly decreased in the bilateral temporal lobe and significantly decreased in the left superior temporal gyrus after HD. The cortical thickness significantly increased in the bilateral temporal lobe, frontal lobe and occipital lobe after HD compared to before HD. The sulcus depth in the bilateral insula, frontal lobe, and parietal lobe after HD significantly increased compared to before HD. No significant differences in sulcus depth between HD and HC were detected. After HD, the cortical thickness of the right parsopercularis was positively correlated with the number connection test-A. Cortical thickness in multiple regions were positively correlated with blood flow velocity and cortical thickness in the left parahippocampal gyrus was negatively correlated with ultrafiltration volume. Patients showed better performance in the digit symbol test and line tracing test after HD compared to before HD, but there were no significant differences in the comparison of neuropsychologic tests between patients and HC.ConclusionThe instant morphological changes were captured during a single hemodialysis in HD patients. There was an association between these instant changes in the brain and clinical parameters and neuropsychologic tests. This work implied the instant impact of a single hemodialysis impact on the brain in HD patients. (shrink)

A “conceptual spaces” approach is used to formalize Aristotle’s main intuitions about time and change, and other ideas about temporal points of view. That approach has been used in earlier studies about points of view. Properties of entities are represented by locations in multidimensional conceptual spaces; and concepts of entities are identified with subsets or regions of conceptual spaces. The dimensions of the spaces, called “determinables”, are qualities in a very general sense. A temporal element is introduced by adding (...) a time variable to state functions that map entities into conceptual spaces. That way, states may have some permanency or stability around time instances. Following Aristotle’s intuitions, changes and events will not be necessarily instant phenomena, instead they could be processual and interval dependent. Change is defined relatively to the interval during which the change is taking place. Time intervals themselves are taken to represent points of view. To have a point of view is to look at the world as it is in the selected interval. Many important concepts are relativized to intervals, for instance change, events, identity, ontology, potentiality, etc. The definition of points of view as intervals allows to compare points of view in relation to all these concepts. The conceptual space approach has an immediate semantic and structural character, but it is tempting to develop also logics to describe them. A formal language is introduced to show how this could be done. (shrink)

In Quodlibet XV q.13, Henry of Ghent considers whether the Virgin Mary was immaculately conceived. He argues that she was not, but rather possessed sin only at the first instant of her existence. Because Henry’s defense of this position involves an elaborate discussion of motion and mutation, his discussion marks an important contribution to medieval discussions of Aristotelian natural philosophy. In fact, a number of scholars have identified Henry’s discussion as the source of an unusual fourteenth-century theory of (...) class='Hi'>change referred to as “quasi-Aristotelianism” (so-called because the account purports to be Aristotelian but is not). My aim in the paper is two-fold: first, to show that Henry's position is not quasi-Aristotelian in the sense that scholars have supposed; second, to show that, even so, his discussion in q. 13 does involve a novel interpretation of Aristotle’s account of instantaneous change. (shrink)

In Quodlibet XV q.13, Henry of Ghent considers whether the Virgin Mary was immaculately conceived. He argues that she was not, but rather possessed sin only at the first instant of her existence. Because Henry’s defense of this position involves an elaborate discussion of motion and mutation, his discussion marks an important contribution to medieval discussions of Aristotelian natural philosophy. In fact, a number of scholars have identified Henry’s discussion as the source of an unusual fourteenth-century theory of (...) class='Hi'>change referred to as “quasi-Aristotelianism” . My aim in the paper is two-fold: first, to show that Henry's position is not quasi-Aristotelian in the sense that scholars have supposed; second, to show that, even so, his discussion in q. 13 does involve a novel interpretation of Aristotle’s account of instantaneous change. (shrink)

Graham Priest has argued that changes occur at a moment of change in which objects are in a contradictory state, being in both the state changed from and the state changed to. In “Moments of Change,” the current author rejected this model on the grounds that every change would require an infinite number of other changes, and that for similar regress problems, the model is not compatible with the Leibniz Continuity Condition that Priest appeals to in the (...) model’s support. In “Contradiction and the Instant of Change Revisited,” Priest rightly points out in response that any regress can be stopped by allowing that some changes can occur without a moment of change and that there are some exceptions to the lcc in the case of change. It is argued here that while the regress can be stopped by allowing for exceptions to the rules, the more exceptions that must be allowed and the more similar the excepted cases are to cases of supposed contradiction, the less attractive both the contradictory account of change and the lcc should be. Secondly, it is argued that the intuitions that make the contradictory account of change seem appealing are likely to disappear if we adopt an eternalist model of spacetime, which we should do in any case in order to best accommodate the special theory of relativity. In particular, eternalism undermines our intuitions that there must be a moment of change in order for change to occur, that contradictory moments are required to allow for a Laplacian universe, that motion must be intrinsic to an object at a time, and that change obeys the lcc. (shrink)

Since antiquity, philosophers have struggled to describe the instant of change in continuous time in a way that is both consistent with classical logic and also objective rather than arbitrary. A particularly important version of this problem arises, I argue, for substantial change, that is, any case in which a metaphysical substance comes into or goes out of existence. I then offer and defend an analysis of the instant of substantial change in continuous time that (...) is consistent with classical logic and objective rather than arbitrary. My key assumption is that, necessarily, every substance ages at every instant at which it exists, from which I conclude that no substance has a first or a last instant of its existence if time is continuous. I also suggest that my solution offers some support for endurantism about substances. (shrink)

Our model of time is the classical continuum of real numbers, and our model of other measurable quantities that change over time is that of functions defined on real numbers with real numbers as values. This model is not derived from reality or from our experience of it, but imposed on reality; and the fit is very imperfect. In classical mathematics, the value of a function for any real number as argument is independent of its value for any other (...) argument: the analogue is Hume's doctrine that events are loose and separate. This makes continuity in the change of any quantity a contingent law of physica, rather than a conceptual necessity. The article explores alternatives to this classical model. (shrink)

In Kierkegaard’s Instant, David J. Kangas reads Kierkegaard to reveal his radical thinking about temporality. For Kierkegaard, the instant of becoming, in which everything changes in the blink of an eye, eludes recollection and anticipation. It constitutes a beginning always already at work. As Kangas shows, Kierkegaard’s retrieval of the sudden quality of temporality allows him to stage a deep critique of the idealist projects of Fichte, Schelling, and Hegel. By linking Kierkegaard’s thought to the tradition of Meister (...) Eckhart, Kangas formulates the central problem of these early texts and puts them into contemporary light—can thinking hold itself open to the challenges of temporality? (shrink)

This paper will argue that the puzzles about instantaneous velocity, and rates of change more generally, are the result of a failure to recognize an ambiguity in the concept of an instant, and therefore of an instantaneous state. We will conclude that there are two distinct conceptions of a temporal instant: (i) instants conceived as fundamentally distinct zero-duration temporal atoms and (ii) instants conceived as the boundary of, or between,temporally extended durations. Since the concept of classical instantaneous (...) velocity is well- defined only on the second conception of instants, we will conclude that this distinction allows us to avoid the above dilemma. If instantaneous velocity is well-defined then the states of a system at various instants are not logically distinct and thus we cannot generate Zeno’s paradox. However, if we assume that the instants are metaphysically distinct, then instantaneous velocity is not well-defined and thus the second horn of the dilemma about the causal-explanatory role of instantaneous velocity cannot be generated. (shrink)

In his De primo et ultimo instanti, Walter Burley paid careful attention to continuity, assuming that continua included and were limited by indivisibles such as instants, points, ubi, degrees of quality, or mutata esse. In his Tractatus primus, Burley applied the logic of first and last instants to reach novel conclusions about qualities and qualitative change. At the end of his Quaestiones in libros Physicorum Aristotelis, William of Ockham used long passages from Burley’s Tractatus primus, sometimes agreeing with Burley (...) and sometimes disagreeing. How may this interaction between Burley and Ockham be understood within its historical context? (shrink)

The new possibility opened up by recent technology of ever-present, unbroken and potentially instant communication has had a fundamental effect on human relations, presenting us with modes of communication unprecedented in human history. Although there are some good effects, one of the bad effects is the potential for degradation in human relations in respect of the capacity for, and habit of, empathy, understanding and thoughtfulness between individuals, and an undermining of the expectation of reasonable anticipation in relation to others (...) and the consequent relief from the responsibility of having such anticipation. Many technological developments have changed human life. But one that so strongly determines communication, when communication is such a central part of what it means to be a person and to have relations with others, is bound to have far profounder effects than most other technological changes. The significance of new modes of communication is set against the fact that it is very recent and utterly unprecedented in human history, and is not something that could have been taken account of as part of the adaptations of human evolution. (shrink)

We have always been conscious of the wait for life-changing messages, whether it be the time it takes to receive a text message from your love, for a soldier's family to learn news from the front, or for a space probe to deliver data from the far reaches of the solar system. In this book in praise of wait times, award-winning author Jason Farman passionately argues that the delay between call and answer has always been an important part of the (...) message. Traveling backward from our current era of Twitter and texts, Farman shows how societies have worked to eliminate waiting in communication and how they have interpreted those times' meanings. Exploring seven eras and objects of waiting--including pneumatic mail tubes in New York, Elizabethan wax seals, and Aboriginal Australian message sticks--Farman offers a new mindset for waiting. In a rebuttal to the demand for instant communication, Farman makes a powerful case for why good things can come to those who wait. (shrink)

a central thesis of martin heidegger's first reading of a Platonic dialogue, the 1924/25 course on the Sophist, was that, "for the Greeks, being means precisely to be present, to be in the present [Anwesend-sein, Gegenwärtig-sein]."1 Heidegger saw this Greek interpretation of being as leading to Plato's specific interpretation of being as eidos or idea. Heidegger makes this clear in the following passage from another Plato course, the 1931–32 course On the Essence of Truth: "'Idea' is the look [der Anblick] (...) of what something offers itself as being. These looks [Anblicke] are that in which the individual thing presents itself as this or that, that in which it is present and presencing [präsent und anwesend].... (shrink)

I examine the reasons Aristotle presents in Physics VIII 8 for denying a crucial assumption of Zeno’s dichotomy paradox: that every motion is composed of sub-motions. Aristotle claims that a unified motion is divisible into motions only in potentiality (δυνάμει). If it were actually divided at some point, the mobile would need to have arrived at and then have departed from this point, and that would require some interval of rest. Commentators have generally found Aristotle’s reasoning unconvincing. Against David Bostock (...) and Richard Sorabji, inter alia, I argue that Aristotle offers a plausible and internally consistent response to Zeno. I defend Aristotle’s reasoning by using his discussion of what to say about the mobile at boundary instants, transitions between change and rest. There Aristotle articulates what I call the Changes are Open, Rests are Closed Rule: what is true of something at a boundary instant is what is true of it over the time of its rest. By contrast, predications true of something over its period of change are not true of the thing at either of the boundary instants of that change. I argue that this rule issues from Aristotle’s general understanding of change, as laid out in Phys. III. It also fits well with Phys. VI, where Aristotle maintains that there is a first boundary instant included in the time of rest, but not a “first in which the mobile began to change.” I then show how this rule underlies Aristotle’s argument that a continuous motion cannot be composed of actual sub-motions. Aristotle distinguishes potential middles, points passed through en route to a terminus, from actual middles. The Changes are Open, Rests are Closed Rule only applies to actual middles, because only they are boundaries of change that the mobile must arrive at and then depart from. On my reading, Aristotle argues that the instant of arrival, the first instant at which the mobile has come to be at the actual middle, cannot belong to the time of the subsequent motion. If it did, the mobile would already be moving towards the next terminus and thus, per Phys. VI 6, would have already left. But it cannot have moved away from the midpoint at the very same moment it has arrived there. This means that the instant of arrival must be separated from the time of departure by an interval of rest. I show how Aristotle’s reasoning applies generally to rule out any continuous reflexive motion or continuous complex rectilinear motion. On my interpretation, however, the argument does not apply to every change of direction. When, as in the case of projectile motion, multiple movers and their relative powers explain why the mobile changes directions, distinct sub-motions are not involved. Aristotle holds that such motions cannot be continuous, not because they involve intervals of rest, but because they involve multiple causes of motion. My interpretation of the Changes are Open, Rests are Closed Rule allows us to make better sense of Aristotle’s argument than any previous interpretation. (shrink)

Instant messaging is a highly diffused form of communication among younger populations, yet little is known about the emotional experience during IM. The present study aimed to investigate the emotional experience during IM by drawing on the Circumplex Model of Affect and measuring heart rate and electrodermal activity as indicators of arousal in addition to self-reported perceived emotional valence. Using an experimental design, we manipulated message latency and message valence. Based on data collected from 65 young adults, we observed (...) arousal as participants’ electrodermal activity levels increased from the time a fictitious peer started typing a response to the receipt of that response, especially in the delayed condition. Electrodermal activity levels also increased in both the positive and the negative message conditions. No changes were observed for heart rate. Participants’ self-report perceived emotional valence revealed that positive messages were evaluated as more pleasant and the peer as more available, while no difference in the self-report was found for message latency. These findings shed light on the emotional experience during IM by adding valuable insights on the physiological processes underlying the anticipation of social reward, but only during delayed IM exchange that can be observed in Human–Computer-Interaction. (shrink)

Graduate Papers from the 2022 Joint Session. It is often said that Aristotle takes geometrical objects to be absolutely unmovable and unchangeable. However, Greek geometrical practice does appeal to motion and change, and geometers seem to consider their objects apt to be manipulated. In this paper, I examine if and how Aristotle’s philosophy of geometry can account for the geometers’ practices and way of talking. First, I illustrate three different ways in which Greek geometry appeals to change. Second, (...) I examine Aristotle’s ontology of geometrical objects and argue that although the truth-makers of geometrical statements are in fact unmovable because they are properties of sensible objects, geometers ‘separate them in thought’ and treat them as substances apt to be modified. Finally, I examine whether allowing for the possibility of manipulating these semi-fictional geometrical individuals creates problems for the applicability of geometry. I find that it does not, insofar as one accepts that geometry is not meant to track physical change but merely to study the instantaneous geometrical configuration of sensible bodies, and is thus only applicable at the instant. (shrink)

Biological mimicry is regarded by many as a textbook illustration of Darwin’s idea of evolution by random mutation followed by differential selection of reproductively fit specimens, resulting in gradual phenotypic change in a population. In this paper, I argue that some cases of so-called mimicry are probably merely look-a-likes and do not gain an advantage due to their similarity in appearance to something else. In cases where a similar appearance does provide a benefit, I argue that it is possible (...) that these forms of mimicry were created in a single generation. An interpretive response to an appearance as a sign can make a new structure perform drastically differently in an environment. In such cases, Darwin’s natural selection mechanism only helps to explain gradual the spread of these new forms, not the creation of them. I argue that biosemiosis should be regarded as a much more powerful mechanism for affecting evolutionary trajectories than the gradualist view allows. I focus on two cases of butterfly mimicry: the Viceroy (Nymphalidae: Limenitis archippus) and Monarch (Nymphalidae: Danaus plexippus) butterflies, supposed Müllerian mimics, and deadleaf mimic butterflies (Kallima). (shrink)

We study belief change in the branching-time structures introduced in Bonanno (Artif Intell 171:144–160, 2007 ). First, we identify a property of branching-time frames that is equivalent (when the set of states is finite) to AGM-consistency, which is defined as follows. A frame is AGM-consistent if the partial belief revision function associated with an arbitrary state-instant pair and an arbitrary model based on that frame can be extended to a full belief revision function that satisfies the AGM postulates. (...) Second, we provide a set of modal axioms that characterize the class of AGM-consistent frames within the modal logic introduced in Bonanno (Artif Intell 171:144–160, 2007 ). Third, we introduce a generalization of AGM belief revision functions that allows a clear statement of principles of iterated belief revision and discuss iterated revision both semantically and syntactically. (shrink)

Although Fuzzy logic and Fuzzy Mathematics is a widespread subject and there is a vast literature about it, yet the use of Fuzzy issues like Fuzzy sets and Fuzzy numbers was relatively rare in time concept. This could be seen in the Fuzzy time series. In addition, some attempts are done in fuzzing Turing Machines but seemingly there is no need to fuzzy time. Throughout this article, we try to change this picture and show why it is helpful to (...) consider the instants of time as Fuzzy numbers. In physics, though there are revolutionary ideas on the time concept like B theories in contrast to A theory also about central concepts like space, momentum… it is a long time that these concepts are changed, but time is considered classically in all well-known and established physics theories. Seemingly, we stick to the classical time concept in all fields of science and we have a vast inertia to change it. Our goal in this article is to provide some bases why it is rational and reasonable to change and modify this picture. Here, the central point is the modified version of “Unexpected Hanging” paradox as it is described in "Is classical Mathematics appropriate for theory of Computation".This modified version leads us to a contradiction and based on that it is presented there why some problems in Theory of Computation are not solved yet. To resolve the difficulties arising there, we have two choices. Either “choosing” a new type of Logic like “Para-consistent Logic” to tolerate contradiction or changing and improving the time concept and consequently to modify the “Turing Computational Model”. Throughout this paper, we select the second way for benefiting from saving some aspects of Classical Logic. In chapter 2, by applying quantum Mechanics and Schrodinger equation we compute the associated fuzzy number to time. (shrink)

Are past, present and future objective features of reality? What is an instant of time? Could time pass if nothing changed? In this book, the author attempts to show how considerations in the philosophy of logic and language are needed to settle these and other well-known issues. Part I deals with the debate over whether time is 'tensed' or 'tenseless'. Various problems are spelt out for the 'tenseless' view, and it is argued that the issue ends up hinging upon (...) whether a genuinely tenseless language is conceivable. Part II has to do with periods and instants. The semantics of dates and of duration-terms are examined, and the notion of a durationless instant attacked. In Part III, the connections between time, change and causation are discussed. A criterial approach to the meanings of certain key temporal terms is adopted, yielding answers to a number of traditional metaphysical issues about time. (shrink)

Here I develop the idea, which I have presented elsewhere, that time instants are abstract entities existing tenselessly and therefore that events and changes likewise may be said to exist tenselessly in virtue of their place at a certain space-time point.

The paper concerns time, change and contradiction, and is in three parts. The first is an analysis of the problem of the instant of change. It is argued that some changes are such that at the instant of change the system is in both the prior and the posterior state. In particular there are some changes from p being true to p being true where a contradiction is realized. The second part of the paper specifies (...) a formal logic which accommodates this possibility. It is a tense logic based on an underlying paraconsistent prepositional logic, the logic of paradox. (See the author's article of the same name Journal of Philosophical Logic 8 (1979).) Soundness and completeness are established, the latter by the canonical model construction, and extensions of the basic system briefly considered. The final part of the paper discusses Leibniz's principle of continuity: Whatever holds up to the limit holds at the limit. It argues that in the context of physical changes this is a very plausible principle. When it is built into the logic of the previous part, it allows a rigorous proof that change entails contradictions. Finally the relation of this to remarks on dialectics by Hegel and Engels is briefly discussed. (shrink)

The presented study investigates attitude change using a cross-modal evaluative conditioning paradigm. EC is a change in evaluative responses towards initially neutral stimulus due to its repeated pairing with affectively valenced stimulus. A positive scent of instant chocolate was used together with pictures of homeless people to change affective responses towards neutral names. We show that a classic EC effect, i.e. more negative CS evaluations after its pairing with negative images of the homeless, can be eliminated (...) when a competitive US, i.e. a positive chocolate scent, is present in the environment. Additionally, the study demonstrates chocolate scent selectively increased attitude towards homeless as measured by perceived distance to self and a self-report questionnaire. Moreover, this effect was not mediated by mood changes. We argue that scents can be used to change attitudes towards stigmatized groups. (shrink)

Some Presentists—according to whom everything is present—identify instants of time with propositions of a certain kind. However, the view that times are propositions seems to be at odds with Presentism: if there are times then there are past times, and therefore things that are past; but how could there be things that are past if everything is present? In this paper, we describe the Presentist view that times are propositions ; we set out the argument that Presentism is incompatible with (...) the view that times are propositions ; and then we describe three possible responses to that argument on behalf of Presentists who identify times with propositions. We argue that each of these responses comes with significant costs. Finally, we describe a fourth possible response—according to which times are irreducibly higher-order entities—which appears to avoid the costs of the other three. We also describe and respond to two objections to the higher-order strategy. (shrink)

This article argues for a shift in evolutionary metaphor-from fitness and the elimination of the less fit to fragility and passage through fragile periods of change. Childhood, for example, can be viewed as state of protected weakness, allowing time for more neural development, learning, and play. Similarly, evolutionary change can be released precisely when competitive pressure is relaxed. The fragility of evolution in time extends to several biological domains. The genetic system exhibits a surprising fluidity, whether from mobile (...) genetic elements or hypermutation due to stress. Through gene duplication, organisms build up redundancy, which can more readily diverge into novelty. With endo-symbiosis one organism becomes incorporated into another, merging genomes, membranes, and metabolisms. As a result novel structures and genetic restructuring occur, making for profound evolutionary change. In a sexual life cycle, gametes within a species group fuse and amplify subtle variation. Hybridization, or unions between atypical sexual partners, can cause instant speciation and an instability that leads to more evolution. With development organisms go through rapid morphological change and sensitive transition phases. Importantly, dissociation of developmental modules in both temporal and spatial ways allow for evolutionary novelty to emerge. Several lines of evidence lead to the hypothesis that the organism's inner matrix can respond to stresses and help shape a fluid genome. In a second article, three more biological domains will be examined, in which organisms and environment more obviously interpenetrate: the remarkably plastic neural/behavioral system, novel synergisms between organisms, and the multiple, complex dynamics of ecosystems-all of which help to generate life's outstanding diversity. Last, the protection of fragile human populations will be discussed. (shrink)

There are basically four options to which state the limiting instant in a change from one state to its opposite belongs – only the first, only the second, both or none. This situation is usually referred to as the limit decision problem since all of these options seem troublesome: The first two alleged solutions are asymmetric and thus need something to ground this asymmetry in ; while the last two options leave the realm of classical logic. I argue (...) that including the debate about dispositions enables new options for solutions to the temporal limit decision problem. Metaphysical considerations function as a symmetry-breaker and thus remove the need for a non-classical solution. Dispositions bring about the changes in the world, so they constitute the metaphysical background for the instant of change. In particular, I argue that according to the triadic process account of dispositions, the limiting instant belongs to the second interval and only the second interval. (shrink)

Priest's theory of motion is based on Leibniz's Continuity Condition (LCC), which states that any state that exists at each instant in a continuous set of moments also exists at its temporal limit. If we accept the CCL, a free-falling pen would have to be simultaneously in motion and at rest at the instant of change: the critical moment when it hits the ground, thus passing from the state of motion to that of rest. This seems to (...) be a contradictory state of affairs, which is precisely what Priest claims to be the case. In this article, I discuss the logical possibility of empirically testing whether such a contradictory state of affairs occurs. (shrink)

There are two no-change objections that can be raised against the B-theory of time. One stems from the observation that in a B-theoretic scenario changes of determinations can only be represented by propositions which have eternal truth values. The other derives from the principle that nothing can vary over a period of time if it doesn’t instantiate a state of change at all the instants of time which compose it. Here I argue that both objections apply to all (...) comparative conceptions of change, regardless of whether they take tense seriously or not. It follows that, contrary to what is widely believed, A-theoretic accounts of time are not immune to no-change objections, just in virtue of being realist about tense. A-theorists must either accept the conclusion that time, according to their account, does not flow, or put forward an account of flow that is not comparative. A number of difficulties with both of these options are discussed. (shrink)

No. 20 in the Marquette series "Mediaecal [[sic]] Philosophical Texts in Translation," this translation is based on J. R. O’Donnell’s edition of the only extant manuscript of the Universal Treatise, and is preceded by a helpful introduction of 28 pp. plus a selected bibliography. An English version of this work should be welcomed by scholars not versed in Latin who are nonetheless interested in Nicholas’ thought, whether because of his highly critical reactions to Aristotle and Averroes or because of certain (...) similarities between his philosophical views and those of Hume. If the latter are primarily to be found in his two extant letters to Bernard of Arezzo, the former constitute the very heart of this work. It should also be noted that the Universal Treatise was originally intended to recall university professors, especially at Paris, to the study of Christianity and ethics. Written c. 1340, its attacks on Aristotle and Averroes were intended to contribute to this purpose. Nevertheless, some of the positions expressed therein were to bring Nicholas himself into conflict with ecclesiastical authority. Not least among these troublesome views from the standpoint of religious orthodoxy was the suggestion that all things are eternal. The situation was further complicated by Nicholas’ contention that not all the views found in the Treatise represent his own convictions. Many are to be taken as probable or more probable. In his attacks on Aristotle and Averroes he does not claim to disprove demonstratively what they held, but only to show that their opinions are less probable than those he advances. Granted that the chief unifying factor in this work is negative, its anti-Aristotelian and anti-Averroistic thrust, yet, as is suggested in the introduction, some kind of positive unifying theme is also at work, Nicholas’ view of the good. Since the universe must always contain the same amount of goodness, everything in it must remain in existence. Therefore the universe consists of unchangeable atoms. From this atomism follows the view that space consists of points and time of instants. Since change in quantity and place cannot produce or destroy real being, Nicholas must therefore hold that quantity is really identical with material substance and that movement is nothing but change in the position of atoms. Moreover, if things are eternal, it is probable that the same holds for the actions of the soul. As eternal such acts remain unchanged and hence do not vary in degree of intensity. They simply pass from person to person. Consequently, the same object cannot be seen clearly and obscurely. Nicholas also suggests that all things are as they appear, granted that such must be accepted not because it has been proved but because this conviction gives pleasure to the mind. Again, he argues that since a cause can produce only one kind of effect, not all things have been produced by God whether as their total or as their partial cause. He then suggests that because God’s power is infinite, no effect can be produced by him naturally. As finite such an effect would not be proportioned to his infinite power. His arguments against any kind of Averroistic theory of one separate intellect for all mankind are both interesting and unusual. In fact he appears to go to the opposite extreme, not only defending individual intellects for individual men but also suggesting that in one and the same soul there are as many intellects as concepts. That Nicholas himself saw some difficulties with this position may be inferred from his admonition that further thought be given to this matter. If the same might be said of other unusual theories advanced in the Treatise, its translators are to be commended for having made it available to English language readers.—J. F. W. (shrink)

In this book, Diana Senechal confronts a culture that has come to depend on instant updates and communication at the expense of solitude. Schools today emphasize rapid group work and fragmented activity, not the thoughtful study of complex subjects. The Internet offers contact with others throughout the day and night; we lose the ability to be apart, even in our minds. Yet solitude plays an essential role in literature, education, democracy, relationships, and matters of conscience. Throughout its analyses and (...) argument, the book calls not for drastic changes but for a subtle shift: an attitude that honors solitude without descending into dogma. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Feminist Studies 44, no. 1. © 2018 by Feminist Studies, Inc. 197 Ashwini Tambe Reckoning with the Silences of #MeToo The past six months have been an important time for US feminism. For women’s studies professors, it’s been heartening to find the world outside our classrooms taking up conversations about sex and power that we’ve been having for decades. In this piece, I will reflect on three questions: What (...) is going on? Why is it happening now? And what forms of feminism have been overlooked in the coverage of the #MeToo movement? I spend the longest time on the third question, because I’m concerned about how #MeToo has advanced a version of public feminism that is, in some ways, out of step with currents in academic feminism. What’s going on? Although feminists have long championed public speak-outs for survivors of sexual violence—whether in Take Back the Night open mics since the 1980s or the workshops also called “MeToo” that Tarana Burke started in Alabama in 2007—the viral force of the hashtag #MeToo in mid-October 2017 took most people by surprise. Within the first twenty-four hours, it had been retweeted half a million times. According to Facebook, nearly 50 percent of US users are friends with someone who posted a message about experiences of assault or harassment. #MeToo was by no means just a US phenomenon: Facebook and Twitter feeds in various parts of the world, notably Sweden, India, and Japan, were rocked for days by this hashtag. Then came the slew of powerful cis-men, largely in the US 198 News and Views media and entertainment industries, who were forced to swiftly resign after allegations of sexual misconduct. This toppling continues and has expanded beyond the media to other industries where reputations matter: politics, music, architecture, and, somewhat belatedly, higher education. In an important way, the ground beneath us has shifted. #MeToo has tilted public sympathy in favor of survivors by changing the default response to belief, rather than suspicion; the hashtag has revealed how widespread sexual coercion is. Why Now? We need to theorize, on a cultural scale, why this movement against sexual harassment and violence in the United States has happened now rather than, say, three years ago, when Bill Cosby was accused by multiple women, or after Roger Ailes, CEO of Fox News, was deposed. #MeToo’s impact may seem sudden, but it is a part of a groundswell in women’s activism since the November 2016 elections. The Women’s March was the largest globally coordinated public gathering in history. The 3-million strong Facebook group Pantsuit Nation saw hundreds of thousands of posts about experiences of misogyny. Unprecedented numbers of women are running for US political office this year. The signature affective note running through this political moment is a fierce rage about the election of Donald Trump. Trump’s impunity, I suggest, serves as a trigger provoking the fury at the heart of #MeToo. There are many reasons to find fault with Trump, but it is distinctly galling that he faced no consequences after acknowledging being a sexual predator. For victims of sexual trauma, it is already painful to watch perpetrators roam free because of how high the burdens of proof are in legal cases. When a person such as Trump is grandly affirmed by an election, it retraumatizes victims. Right after the election, therapists and counseling centers were flooded with patients seeking help with processing past events. The ballast provided by women’s feverish organizing and the instant power of social media has facilitated a collective emboldening. Trump has made the comeuppance of all powerful men feel more urgent. But from the inception of #MeToo, I have also watched its racial and class politics with some wariness: whose pain was being centered, I wondered? A colleague recently asked aloud: is #MeToo a white women’s movement? Another wondered, is this a moral panic? These questions News and Views 199 underline the importance of feminist insights that are overlooked in dominant coverage of the movement. What’s Left Out? Critical race feminism offers important insights when exploring the question of whether this is a white... (shrink)