Fixpoint semantics are provided for ambiguity blocking and propagating variants of Nute's defeasible logic. The semantics are based upon the well-founded semantics for logic programs. It is shown that the logics are sound with respect to their counterpart semantics and complete for locally finite theories. Unlike some other nonmonotonic reasoning formalisms such as Reiter's default logic, the two defeasible logics are directly skeptical and so reject floating conclusions. For defeasible theories with transitive priorities on defeasible rules, the logics are (...) shown to satisfy versions of Cut and Cautious Monotony. For theories with either conflict sets closed under strict rules or strict rules closed under transposition, a form of Consistency Preservation is shown to hold. The differences between the two logics and other variants of defeasible logic—specifically those presented by Billington, Antoniou, Governatori, and Maher—are discussed. (shrink)

Le Prophète - que la bénédiction et le salut de Dieu soient sur lui - a dit : " La recherche du licite est une obligation pour tout musulman ". C'est là une obligation d'entre les obligations, la plus difficile à comprendre et à mettre en pratique. C'est ce qui explique la quasi-disparition de la science du licite et de sa mise en application. La difficulté à la saisir est la cause de sa disparition car les ignorants pensent que le (...) licite est perdu et qu'il ne reste de sain que l'eau douce et l'herbe qui pousse dans les terres en friche tout le reste ayant été souillé par des mains malignes et corrompu par de mauvaises pratiques. Ce prétexte de l'herbe justifierait le recours à l'illicite. Ils ont totalement rejeté ce principe de la religion et ne peuvent différencier les choses. Hélas! Le licite est clair et l'illicite aussi, et, entre les deux, se situe l'ambigu. Ces trois cas demeurent liés, quelle que soit la situation. Et puisque cette hérésie s'est répandue dans la religion et que ses méfaits se sont propagés parmi les gens, il est un devoir d'en dévoiler la corruption en amenant, par une argumentation rigoureuse, à la faculté de distinguer entre le licite et l'illicite pour atteindre une clarté que nul obstacle ne pourra voiler. (shrink)

The beginning of the new realm in philosophical research, which is the oral history of phiosophy, is followed by the consequential set of serious ethical issues. The purpose of this article is to identify moral orientations a historian of philosophy can rely on in oral communication with respondents. The starting point of the analysis is the ethical standards of interviews developed by the Oral History Society. An example to test these standards based on the principle of maximum tolerance is the (...) case of Martin Heidegger. Considering the ambiguity of some outstanding philosophical figures, the main task of the article is to find the line between propagation of the dangerous views of the philosopher and objective philosophical analysis. As a guide to the ethics of interviewing philosophers, I propose the approach suggested by Alain Badieu and Barbara Cassin regarding Heidegger. They claim that a great philosopher can simultaneously be a Nazi and an anti-Semite. I outlined the general feature of interaction with ambiguous personalities in a philosophical interview: (1) the interviewer should not make extreme judgments in advance; (2) We have no right to remove some ambiguous philosophers from discourse, and communication with them is a personal matter of the interviewer. But philosophical community should produce the criteria for exact distinction between the sphere of ethically unacceptable and realm of uncertain. (shrink)

The current status of localization and related concepts, especially localized statevectors and position operators, within Lorentz-invariant Quantum Theory (LIQT) is ambiguous and controversial.1 Ever since the early work of Newton & Wigner (1949), and the subsequent extensions of their work, particularly by Hegerfeldt (1974, 1985), it has seemed impossible to identify localized statevectors or position operators in LIQT that were not counterintuitive—strange—in one way or another; the most striking strange property being the superluminal propagation of the localized states. The (...) ambiguous and controversial status of these concepts arises from the varied reactions that workers have to the strange properties. Some regard them, particularly the superluminal propagation, as utterly unacceptable, and conclude that no precise concepts of localized statevectors and position operators exist in LIQT (Wigner 1973, p. 325-327; 1983, pp. 310-313; Malament 1996). Others downplay the whole issue, on the grounds that current theoretical and experimental practice has no need of sharply formulated concepts of localization, localized states etc. (Birrell & Davies 1984, pp. 48-59; Haag 1992, p. 34). Still others, including ourselves, believe that the superluminal propagation does not lead to causal contradictions, and is not in conflict with available empirical data: so that it should not be ruled out. We also believe that the other strange properties are merely unfamiliar novelties of LIQT which we must simply learn to accept. (Like the superluminal propagation, they do not lead to causal contradictions, nor conflict with available data.) So in this paper, we aim to help remove the ambiguous and controversial status of localization concepts in LIQT. Overall, our strategy will be to assess a number of localization concepts, and thereby clarify the often complex relationships among them. (shrink)

The fields of quantum biology and physics are now starting to unite to solve the mysteries associated with the field of evolutionary biology. One such question is the origination and propagation of consciousness which has always been ambiguous and in order to understand this concept, many theories have been proposed by several philosophers and scientists. This review paper agrees with the idea, that evolution is not a random process but hypothesizes, that its succession was managed by the expanding level (...) of consciousness due to cell division and cell differentiation. Several theories propose that the cytoskeleton and its proteins are promoters for consciousness in the brain, which propagates by means of super-conductance. A better correlation of cytoskeletal evolution and consciousness could help solve the enigma of the origination, propagation and existence of consciousness. This review is a compilation of theories, evidences and scientific studies which intends to bring an association between propagation of consciousness and the evolution of the cytoskeleton and its proteins. (shrink)

Jeremy Bentham's, hitherto known as, has recently appeared in definitive form in The Collected Works of Jeremy Bentham. The essay contains what is arguably the most influential critique of natural rights, and by extension human rights, ever written. Bentham's fundamental argument was that natural rights lacked any ontological basis, except to the extent that they reflected the personal desires of those propagating them. Moreover, by purporting to have a basis in nature, the language of natural rights gave a veneer of (...) respectability to what, in the case of the French Revolutionaries at least, were at bottom violent and selfish passions. Yet that having been said, Bentham had no objection to the notion of a right which expressed a moral claim founded on the principle of utility. However, the phrase better captured what was at stake, and avoided all the ambiguities otherwise associated with the word. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Journal of the History of Philosophy 38.4 (2000) 529-548 [Access article in PDF] Shaftesbury's Two Accounts of the Reason to be Virtuous Michael B. Gill College of Charleston 1. Anthony Ashley Cooper, the third Earl of Shaftesbury (1671-1713), was the founder of the moral sense school, or the first British philosopher to develop the position that moral distinctions originate in sentiment and not in reason alone. Shaftesbury thus struck (...) the initial blow in the battle waged by sentimentalists such as Hutcheson and Hume against rationalists such as Cudworth and Clarke.Such is a common view of Shaftesbury's place in the history of moral philosophy.1 But while this common view is accurate in a very general sense, it also oversimplifies in a manner that threatens to misrepresent the development of modern ethical theory and obscure what is most interesting about Shaftesbury.2 The view suggests, in particular, that the most important distinction in early modern British moral philosophy was between sentimentalism and rationalism. There was, however, a distinction ontologically deeper than [End Page 529] that, which explains how Shaftesbury, even while developing his moral sense theory, could at times be much closer to his rationalist predecessors Cudworth and Clarke than to his sentimentalist followers Hutcheson and Hume.In this paper I will elucidate this deeper ontological distinction by examining two different accounts that Shaftesbury gives of the reason to be virtuous. Both of Shaftesbury's accounts are in a sense sentimentalist, but only the second of them constitutes a sharp break from his rationalist predecessors. Shaftesbury himself does not seem fully aware of the radical implications of his second account, but the implications are there nonetheless. And by exposing them we will gain a view not only of a crucial ambiguity in Shaftesbury's thought but also of a central faultline in the history of British moral philosophy. We will also come to see that while Shaftesbury does pave the way for a new ontology of morals, he does so more by accident than by design.3 2. Shaftesbury believes that to be virtuous is to have a benevolent character or a deep non-derivative commitment to promote the "publick Interest."4 He also believes that a person who has a benevolent character will always be happier than a person who does not, and that this constitutes a sufficient reason for each of us to "embrace" virtue (Inquiry 48).5 But of course some will deny that the benevolent person is always happiest and so Shaftesbury sets out to prove that there exists between benevolence and happiness a natural and necessary connection.How does Shaftesbury establish the connection between benevolence and happiness? In two different ways.6 The first way of establishing the connection [End Page 530] can be called the teleological account, and the second way can be called the mental enjoyment account. Let us first examine the teleological account.The initial claim of Shaftesbury's teleological account of the reason to embrace virtue is that benevolence is what is most natural for humans, or their proper end or telos.7 As he puts it just after explaining "whatVirtueis," It has been already shewn, that in the Passions and Affections of particular Creatures, there is a constant relation to the Interest of a Species, or common Nature. This has been demonstrated in the case of natural Affection, parental Kindness, Zeal for Posterity, Concern for the Propagation and Nurture of the Young, Love of Fellowship and Company, Compassion, mutual Succour, and the rest of this kind. Nor will any-one deny that this Affection of a Creature towards the Good of the Species or common Nature, is as proper and natural to him, as it is to any Organ, Part or Member of an Animal-Body, or mere Vegetable, to work in its known Course, and regular way of Growth. 'Tis not more natural for the Stomach to digest, the Lungs to breathe, the Glands to separate juices, or other Intrails to perform their several Offices; however they may by particular Impediments... (shrink)

The central concern of this book is to demonstrate how Puritanism was a theme which ran through all Green's biography and political philosophy. It thereby reveals how Green’s connections with Evangelicalism and his known affinities with religious dissent came from his way of conceiving Puritanism. In Green’s eyes, its anti-formalist viewpoint made Puritanism the most suitable tool for avoiding the drawbacks of democracy. The key objective of the book is to illustrate how the philosophy elaborated by Green aimed to encapsulate (...) the best of Puritanism whilst eschewing the dangerous abstractions of both Puritan philosophy and German idealism. It follows that Green’s conception of positive and negative freedom, and his vision of political obligation, stemmed from his effort to revive the Puritan heritage rather than from an ambiguous flirtation with idealism. The book purports to show how the influence of Puritanism in Green’s political thought is an element which can help to integrate the literature in the area, contributing to a better comprehension of a philosopher who, despite being unanimously considered as the founder of the so-called Oxford idealist school, had a very difficult and sometimes obscure connection with idealism. It has been widely argued that Green’s relationship with idealism seemed to be infected by a religious germ which, because it was unrelated to German idealism, gave it a bad taste. This study aims to encourage further investigation into the nature and propagation of that germ in the British idealist School. (shrink)

This article explores the complex position of British women missionaries under the Raj at a time of rising Indian nationalism in the 1920s, 1930s and 1940s. By 1920, 311 unmarried female recruits were serving the two leading Anglican societies in India – the high-Church Society for the Propagation of the Gospel and the evangelical Church Missionary Society – as opposed to 270 men. Although they transgressed imperial norms of ‘pukka’ female behaviour, these single women had numerous ties to the (...) British regime. Missionary and imperial ideals of service intertwined, and mission institutions frequently enjoyed imperial patronage. Sometimes, as at the Criminal Tribes Settlement in Hubli, women missionaries were even employed in direct government service. Using letters and reports, this article examines women missionaries’ negotiation of their complicated status, traversing the gap between the ruling race and its awakening subjects. It highlights their reticence with regards to all-India nationalist politics and their concentration on immediate, local affairs, arguing that such apoliticism and parochialism were consequences of their distinctive, gendered position within mission and imperial hierarchies. Their responses to nationalism and Independence were also conditioned by their Christianity, in particular their ultimate aim to ‘Indianize’ the Mission, promoting swaraj – not necessarily for India as a nation – but for the indigenous Indian Church. After Independence, this ongoing work, and the ambiguities of women missionaries’ connections to Empire, legitimated their continued presence in the subcontinent. (shrink)

In this essay, I indicate how social-science approaches can throw light on predictive genetic testing (PGT) in various societal contexts. In the first section, I discuss definitions of various forms of PGT, and point out their inherent ambiguity and inappropriateness when taken out of an ideal–typical context. In section two, I argue further that an ethics approach proceeding from the point of view of the abstract individual in a given society should be supplemented by an approach that regards bioethics (...) as inherently ambiguous, contested, changeable and context-dependent. In the last section, I place these bioethical discussions of PGT in the context of Asian communities. Here, a critical view of what constitutes a community and culture proves necessary to understand the role of bioethical debates and the empirical manifestations of PGT in Asian societies. A discussion of the concepts of family and kinship in relation to PGT indicates that any bioethical analysis has to take into account that bioethical values are not just reflections of a cultural community, but embody both bioethical ideals and prevalent political rhetoric which is exhibited, propagated and manipulated by individuals and collectives for a variety of purposes. I end by summarising the contributions that social science could make to the understanding of the bioethics of PGT. (shrink)

A close reading of the poem of Parmenides, with focal attention to the way the proem situates Parmenides' insight in relation to Hesiod and Anaximander and provides the context for the thought of "... is". I identify three pointed ambiguities, in the direction of the journey to the gates of the ways of Night and Day, in the way the gates swing open before the waiting traveler, and in the character of the "chasm" that their opening makes, and I suggest (...) ways in which these ambiguities at once complicate and determine the significance of the thought of "... is" and its implications for the status of the opinions of mortals. (shrink)

The ambiguity theory of “knows” is the view that knows and its cognates have more than one propositional sense—i.e., more than one sense that can properly be used in “knows that” etc. constructions. The ambiguity theory of “know” has received relatively little attention as an account of the truth-conditions for knowledge ascriptions and denials—especially compared to views like classical, moderate invariantism and epistemic contextualism. In this paper, it is argued that the ambiguity theory of knows has an (...) advantage over both classical, moderate invariantism and epistemic contextualism. This advantage is that it is the only one of these views that can account for “diverging knowledge responses without inconsistency” —i.e., cases in which, for the same subject S and proposition p, one and the same speaker says truly “S knows p” but instead could have truly said “S does not know p” and vice versa. This paper argues both for the existence of DRWI scenarios and the ability of the ambiguity theory of knows to best explain their existence. (shrink)

_The Ambiguity of Justice_ consists of a collection of essays that address difficulties and potential contradictions in thinking justice by focussing on Ricoeur's theory of justice and on the major thinkers that were influential for it.

It is not uncommon in the history of science and philosophy to encounter crucial experiments or crucial objections the truth-value of which we are ignorant, that is, about which we suspend judgment. Should we ignore such objections? Contrary to widespread practice, I show that in and only in some circumstances they should not be ignored, for the epistemically rational doxastic attitude is to suspend judgment also about the hypothesis that the objection targets. In other words, suspension of judgment “propagates” from (...) the crucial objection to the hypothesis. In this paper I study under which conditions this phenomenon occurs, and discuss its significance for the topics of skepticism, scientific realism, and peer disagreement. (shrink)

Macpherson (Nous 40(1):82–117, 2006) argues that the square/regular diamond figure threatens representationalism, construed as the theory which holds that the phenomenal character is explained by the nonconceptual content of experience. Her argument is the claim that representationalism is committed to the thesis that differences in the experience of ambiguous figures, the gestalt switch, should be explained by differences in the NCC of perception of these figures. However, with respect to the square/regular diamond and some other ambiguous figure representationalism fails to (...) offer a unified account of how representational content makes them ambiguous. In this paper, I aim, first, to offer a representationalist account of ambiguous figures and, second, to examine and rebut Macpherson’s arguments. My main point is that in each ambiguous figure Macpherson discusses there are differences in representational content that can explain differences in phenomenal character or content. The representational differences are due to the ways the Cartesian frame of reference in which perceptual content is always cast cuts the figure, underlying different properties of the figure with respect to the axes of the Cartesian frame of reference. (shrink)

Let f be a computable function from finite sequences of 0ʼs and 1ʼs to real numbers. We prove that strong f-randomness implies strong f-randomness relative to a PA-degree. We also prove: if X is strongly f-random and Turing reducible to Y where Y is Martin-Löf random relative to Z, then X is strongly f-random relative to Z. In addition, we prove analogous propagation results for other notions of partial randomness, including non-K-triviality and autocomplexity. We prove that f-randomness relative to (...) a PA-degree implies strong f-randomness, hence f-randomness does not imply f-randomness relative to a PA-degree. (shrink)

Our aim in this article is to attempt to discuss propagating organization of process, a poorly articulated union of matter, energy, work, constraints and that vexed concept, “information”, which unite in far from equilibrium living physical systems. Our hope is to stimulate discussions by philosophers of biology and biologists to further clarify the concepts we discuss here. We place our discussion in the broad context of a “general biology”, properties that might well be found in life anywhere in the cosmos, (...) freed from the specific examples of terrestrial life after 3.8 billion years of evolution. By placing the discussion in this wider, if still hypothetical, context, we also try to place in context some of the extant discussion of information as intimately related to DNA, RNA and protein transcription and translation processes. While characteristic of current terrestrial life, there are no compelling grounds to suppose the same mechanisms would be involved in any life form able to evolve by heritable variation and natural selection. In turn, this allows us to discuss at least briefly, the focus of much of the philosophy of biology on population genetics, which, of course, assumes DNA, RNA, proteins, and other features of terrestrial life. Presumably, evolution by natural selection—and perhaps self-organization—could occur on many worlds via different causal mechanisms. Here we seek a non-reductionist explanation for the synthesis, accumulation, and propagation of information, work, and constraint, which we hope will provide some insight into both the biotic and abiotic universe, in terms of both molecular self reproduction and the basic work energy cycle where work is the constrained release of energy into a few degrees of freedom. The typical requirement for work itself is to construct those very constraints on the release of energy that then constitute further work. Information creation, we argue, arises in two ways: first information as natural selection assembling the very constraints on the release of energy that then constitutes work and the propagation of organization. Second, information in a more extended sense is “semiotic”, that is about the world or internal state of the organism and requires appropriate response. The idea is to combine ideas from biology, physics, and computer science, to formulate explanatory hypotheses on how information can be captured and rendered in the expected physical manifestation, which can then participate in the propagation of the organization of process in the expected biological work cycles to create the diversity in our observable biosphere. Our conclusions, to date, of this enquiry suggest a foundation which views information as the construction of constraints, which, in their physical manifestation, partially underlie the processes of evolution to dynamically determine the fitness of organisms within the context of a biotic universe. (shrink)

This paper considers the question of “atheism” as it arises in Hume’s _Dialogues_. It argues that the concept of “atheism” involves several signficiant ambiguities that are indicative of philosophical and interpretive disagreements of a more substantial nature. It defends the view that Philo’s general sceptical orientation accurately represents Hume’s own “irreligious” and “atheistic” commitments, both in the _Dialogues_ and in his other (“earlier”) writings. While Hume was plainly a “speculative atheist”, his “practical atheism” was targeted more narrowly against “superstition” - (...) as opposed to deism or religion of a more “philosophical” kind. (shrink)

In arguing against a supposed ambiguity, philosophers often rely on the zeugma test. In an application of the zeugma test, a supposedly ambiguous expression is placed in a sentence in which several of its supposed meanings are forced together. If the resulting sentence sounds zeugmatic, that is taken as evidence for ambiguity; if it does not sound zeugmatic, that is taken as evidence against ambiguity. The aim of this article is to show that arguments based on the (...) second direction of the test are misguided: ambiguous expressions, and in particular philosophically contested ones, do not reliably lead to zeugmaticity, so an absence of zeugmaticity provides no meaningful evidence for an absence of ambiguity. (shrink)

Elicitation methods in decision-making under risk allow us to infer the utilities of outcomes as well as the probability weights from the observed preferences of an individual. An optimally efficient elicitation method is proposed, which takes the inevitable distortion of preferences by random errors into account and minimizes the effect of such errors on the inferred utility and probability weighting functions. Under mild assumptions, the optimally efficient method for eliciting utilities and probability weights is the following three-stage procedure. First, a (...) probability is elicited whose subjective weight is one half. Second, the utility function is elicited through the midpoint chaining certainty equivalent method using the probability elicited at the first stage. Finally, the probability weighting function is elicited through the probability equivalent method. (shrink)

Freud proposes that in unconscious processing, logical connections are also (heavily) based upon phonological similarities. Repressed concerns, for example, would also be expressed by way of phonologic ambiguity. In order to investigate a possible unconscious influence of phonological similarity, 31 participants were submitted to a tachistoscopic subliminal priming experiment, with prime and target presented at 1ms. In the experimental condition, the prime and one of the 2 targets were phonological reversed forms of each other, though graphemically dissimilar (e.g., “nice” (...) and “sign”); in the control condition the targets were pseudo-randomly attributed to primes to which they don’t belong. The experimental task was to “blindly” pick the choice most similar to the prime. ERPs were measured with a focus on the N320, which is known to react selectively to phonological mismatch in supraliminal visual word presentations. The N320 amplitude-effects at the electrodes on the midline and at the left of the brain significantly predicted the participants’ net behavioral choices more than half a second later, while their subjective experience is one of arbitrariness. Moreover, the social desirability score (SDS) significantly correlates with both the behavioral and the N320 brain responses of the participants. It is proposed that in participants with low SDS the phonological target induces an expected reduction of N320 and this increases their probability to pick this target. In contrast, high defensive participants have a perplexed brain reaction upon the phonological target, with a negatively peaking N320 as compared to control and this leads them to avoid this target more often. Social desirability, which is understood as reflecting defensiveness, might also manifest itself as a defense against the (energy-consuming) ambiguity of language. The specificity of this study is that all of this is happening totally out of awareness and at the level of very elementary linguistic distinctions. (shrink)

How should we make decisions when we do not know the relevant physical probabilities? In these ambiguous situations, we cannot use our knowledge to determine expected utilities or payoffs. The traditional Bayesian answer is that we should create a probability distribution using some mix of subjective intuition and objective constraints. Imprecise Bayesians argue that this approach is inadequate for modelling ambiguity. Instead, they represent doxastic states using credal sets. Generally, insofar as we are more uncertain about the physical probability (...) of an event, there is more divergence in the credal set. Hence, their approach can represent these ambiguities via the extent of the divergence. Imprecise Bayesianism has mostly been advocated for its epistemological features. In this article, we examine its properties for decision-making. We develop a model for comparing standard and Imprecise Bayesianism by testing their performances in a classic decision problem. We find that the representational tools of Imprecise Bayesianism also cause it to underperform in our tests. This issue has been overlooked, because previous research on Imprecise Bayesianism has not utilised agent-based modelling to provide information about its performance in the short-run. Overall, we reveal the Ambiguity Dilemma for Imprecise Bayesianism: To what extent should one value representational power or decision-making performance? (shrink)

Representationalism is the position that the phenomenal character of an experience is either identical with, or supervenes on, the content of that experience. Many representationalists hold that the relevant content of experience is nonconceptual. I propose a counterexample to this form of representationalism that arises from the phenomenon of Gestalt switching, which occurs when viewing ambiguous figures. First, I argue that one does not need to appeal to the conceptual content of experience or to judgements to account for Gestalt switching. (...) I then argue that experiences of certain ambiguous figures are problematic because they have different phenomenal characters but that no difference in the nonconceptual content of these experiences can be identified. I consider three solutions to this problem that have been proposed by both philosophers and psychologists and conclude that none can account for all the ambiguous figures that pose the problem. I conclude that the onus is on representationalists to specify the relevant difference in content or to abandon their position. (shrink)

It was commonly accepted in Goethe’s time that plants were equipped both to propagate themselves and to play a certain role in the natural economy as a result of God’s beneficent and providential design. Goethe’s identification of sexual propagation as the “summit of nature” in The Metamorphosis of Plants (1790) might suggest that he, too, drew strongly from this theological-metaphysical tradition that had given rise to Christian Wolff’s science of teleology. Goethe, however, portrayed nature as inherently active and propagative, (...) itself improvising into the future by multiple means, with no extrinsically pre-ordained goal or fixed end-point. Rooted in the nature philosophy of his friend and mentor Herder, Goethe’s plants exhibit their own historically and environmentally conditioned drives and directionality in The Metamorphosis of Plants. In this paper I argue that conceiving of nature as active productivity—not merely a passive product—freed Goethe of the need to tie plants’ forms and functions to a divine system of ends, and allowed him to consider possibilities for plants, and for nature, beyond the walls of teleology. (shrink)

A personalized recommender system is broadly accepted as a helpful tool to handle the information overload issue while recommending a related piece of information. This work proposes a hybrid personalized recommender system based on affinity propagation, namely, APHPRS. Affinity propagation is a semisupervised machine learning algorithm used to cluster items based on similarities among them. In our approach, we first calculate the cluster quality and density and then combine their outputs to generate a new ranking score among clusters (...) for the personalized recommendation. In the first phase, user preferences are collected and normalized as items rating matrix. This generated matrix is then clustered offline using affinity propagation and kept in a database for future recommendations. In the second phase, online recommendations are generated by applying the offline model. Negative Euclidian similarity and the quality of clusters are used together to select the best clusters for recommendations. The proposed APHPRS system alleviates problems such as sparsity and cold-start problems. The use of affinity propagation and the hybrid recommendation technique used in the proposed approach helps in improving results against sparsity. Experiments reveal that the proposed APHPRS performs better than most of the existing recommender systems. (shrink)

The aim of this article is to think about a current issue, the discourse of the Brazilian philosophical making, not worked in the content of Being and Nothingness. However, we think it is possible to bring up some of the themes discussed there, as well as Sartre's philosophical writing, to warn us about the pitfalls of this discourse, which is positioned as the opposite and better than the previous one, but which ends up reproducing what he criticizes by remaining in (...) an excluding dualism. Returning to the Sartrean perspective of thinking in terms of ambiguities, avoiding falling into both realism and idealism, balancing presence to oneself with presence to the world, seems us fundamental, even today, for a more complex discussion, which does not fall into false dilemmas. (shrink)

Buildings are frequently described as ambiguous and, indeed, they often involve the ambivalence associated with ambiguous symbols. In this paper, I develop a theory of architectural ambiguity within the framework of a Goodmanian symbol theory. Based upon Israel Scheffler’s study of verbal and pictorial ambiguity, I present a theory of denotational ambiguity of buildings which distinguishes four types of ambiguity: elementary ambiguity, interpretation-ambiguity, multiple meaning and metaphor, which proves to be a special case of (...) multiple meaning. Denotationally ambiguous buildings are exceptions, because buildings usually exemplify rather than denote. I therefore add a theory of exemplificational ambiguity. The crucial distinction between mere multiple exemplification and genuine exemplificational ambiguity leads to two versions of each of the first three types of ambiguity. The resulting extension of Goodman’s symbol theory is of interest beyond architecture. (shrink)

In this short note we show that the so-called Ambiguous Set (2019) is a subclass of the Double Refined Indeterminacy Neutrosophic Set (2017) and is a particular case of the Refined Neutrosophic Set (2013). Also, the Ambiguous Set is similar to the Quadripartitioned Neutrosophic Set (2016), and Belnap’s Four-Valued Logic (1975).

A word, phrase, or sentence is ambiguous if it has more than one meaning. The word 'light', for example, can mean not very heavy or not very dark. Words like 'light', 'note', 'bear' and 'over' are lexically ambiguous. They induce ambiguity in phrases or sentences in which they occur, such as 'light suit' and 'The duchess can't bear children'. However, phrases and sentences can be ambiguous even if none of their constituents is. The phrase 'porcelain egg container' is structurally (...) ambiguous, as is the sentence 'The police shot the rioters with guns'. Ambiguity can have both a lexical and a structural basis, as with sentences like 'I left her behind for you' and 'He saw her duck'. (shrink)

The status of moral testimony has recently been challenged, for both epistemic and non‐epistemic reasons. This paper distinguishes two methods of teaching: transmission, “classic” learning from testimony, that results in second hand knowledge, and propagation which results in first hand knowledge and understanding. Moral propagation avoids most of the epistemic and non‐epistemic problems of transmission. Moreover, moral propagation can develop and refine non‐cognitive attitudes too. Therefore moral testimony should (and normally does) take the form of moral (...) class='Hi'>propagation, not transmission. (shrink)

Ambiguous Adventure, one of the most iconic novels in Senegalese history, recounts the plight of a traditional African society in the face of an encroaching western modernity, with its main character, Samba Diallo, as the face of this momentous struggle. The captivating story inspired numerous critiques that address the text from sociological, religious, and philosophical perspectives. Not surprisingly, most of the interpretations are based on the textual connection to Islam, the religion embraced and practiced by the Diallobé community in the (...) novel, and deal with universal topics such as death, identity, colonialism, initiation, tradition, and modernity. Building on the work done before me on Samba’s own search for identity within the Muslim context, I look to pre-Islamic Fulani traditions articulated by Amadou Hampaté Bâ, which better illuminate the process of initiation that leads the human being to transform into a self-realized person. I argue, based on this Fulani metaphysical context, that from the very beginning, Samba Diallo’s journey is initiatic in itself, in the traditional Fulani conception of the term, one that is connected to the sacred dimension. In this sense, the Fulani indigenous traditions anticipate Samba’s journey toward a sacred identity, highlight a clear roadmap to that very process, and, contrary to many critics, lead the initiate to success. (shrink)

Coherent-ambiguity aversion is defined within the smooth-ambiguity model as the combination of choice-ambiguity and value-ambiguity aversion. Five ambiguous decision tasks are analyzed theoretically, where an individual faces two-stage lotteries with binomial, uniform, or unknown second-order probabilities. Theoretical predictions are then tested through a 10-task experiment. In tasks 1–5, risk aversion is elicited through both a portfolio choice method and a BDM mechanism. In tasks 6–10, choice-ambiguity aversion is elicited through the portfolio choice method, while value- (...) class='Hi'>ambiguity aversion comes about through the BDM mechanism. The behavior of over 75 % of classified subjects is in line with the KMM model in all tasks 6–10, independent of their degree of risk aversion. Furthermore, the percentage of coherent-ambiguity-averse subjects is lower in the binomial than in the uniform and in the unknown treatments, with only the latter difference being significant. The most part of coherent-ambiguity-loving subjects show a high risk aversion. (shrink)

BackgroundIn about one in 10,000 cases, a published article is retracted. This very often means that the results it reports are flawed. Several authors have voiced concerns about the presence of retracted research in the memory of science. In particular, a retracted result is propagated by citing it. In the published literature, many instances are given of retracted articles that are cited both before and after their retraction. Even worse is the possibility that these articles in turn are cited in (...) such a way that the retracted result is propagated further.MethodsWe have conducted a case study to find out how a retracted article is cited and whether retracted results are propagated through indirect citations. We have constructed the entire citation network for this case.ResultsWe show that directly citing articles is an important source of propagation of retracted research results. In contrast, in our case study, indirect citations do not contribute to the propagation of the retracted result.ConclusionsWhile admitting the limitations of a study involving a single case, we think there are reasons for the non-contribution of indirect citations that hold beyond our case study. (shrink)

The veil of ignorance argument was used by John C. Harsanyi to defend Utilitarianism and by John Rawls to defend the absolute priority of the worst off. In a recent paper, Lara Buchak revives the veil of ignorance argument, and uses it to defend an intermediate position between Harsanyi's and Rawls' that she calls Relative Prioritarianism. None of these authors explore the implications of allowing that agent's behind the veil are averse to ambiguity. Allowing for aversion to ambiguity---which (...) is both the most commonly observed and a seemingly reasonable attitude to ambiguity---however supports a version of Egalitarianism, whose logical form is quite different from the theories defended by the aforementioned authors. Moreover, it turns out that the veil of ignorance argument neither supports standard Utilitarianism nor Prioritarianism unless we assume that rational people are insensitive to ambiguity. (shrink)

We use probability-matching variations on Ellsberg’s single-urn experiment to assess three questions: (1) How sensitive are ambiguity attitudes to changes from a gain to a loss frame? (2) How sensitive are ambiguity attitudes to making ambiguity easier to recognize? (3) What is the relation between subjects’ consistency of choice and the ambiguity attitudes their choices display? Contrary to most other studies, we find that a switch from a gain to a loss frame does not lead to (...) a switch from ambiguity aversion to ambiguity neutrality and/or ambiguity seeking. We also find that making ambiguity easier to recognize has little effect. Finally, we find that while ambiguity aversion does not depend on consistency, other attitudes do: consistent choosers are much more likely to be ambiguity neutral, while ambiguity seeking is much more frequent among highly inconsistent choosers. (shrink)

The orthodox view of proper names, Millianism, provides a very simple and elegant explanation of the semantic contribution of referential uses of names–names that occur as bare singulars and as the argument of a predicate. However, one problem for Millianism is that it cannot explain the semantic contribution of predicative uses of names. In recent years, an alternative view, so-called the-predicativism, has become increasingly popular. According to the-predicativists, names are uniformly count nouns. This straightforwardly explains why names can be used (...) predicatively, but is prima facie less congenial to an analysis of referential uses. To address this issue, the-predicativists argue that referential names are in fact complex determiner phrases consisting of a covert definite determiner and a count noun—and so, a referential name is a definite description. In this paper, I will argue that despite the appearance of increased theoretical complexity, the view that names are ambiguous between predicative and referential types is in fact superior to the unitary the-predicativist view. However, I will also argue that to see why this ambiguity view is better, we need to give up the standard Millian analysis. Consequently, I will first propose an alternative analysis of referential names that retains the virtues of Millianism, but provides an important explanatory connection to the predicative uses. Once this analysis of names is adopted, the explanation for why names are systematically ambiguous between referential and predicative types is both simple and elegant. Second, I will argue that the-predicativism has the appearance of being simpler than an ambiguity view, but is in fact unable to account for certain key properties of referential names without making ad hoc stipulations. (shrink)

In this paper I argue for the Atlas-Kempson Thesis that sentences of the form The A is not B are not ambiguous but rather semantically general (Quine), non-specific (Zwicky and Sadock), or vague (G. Lakoff). This observation refutes the 1970 Davidson-Harman hypothesis that underlying structures, as full semantic representations, are logical forms. It undermines the conception of semantical presupposition, removes a support for the existence of truth-value gaps for presuppositional sentences (the remaining arguments for which are viciously circular), and lifts (...) the Russell-Strawson dispute of 1950–1964 from stalemate to a formulation in which a resolution is possible for the first time. Suggestions of Davidson, Montague, Stalnaker, Kaplan and H. P. Grice are shown to be inadequate semantic descriptions of negative, presuppositional sentences. I briefly discuss the radical Pragmatics view of my 1975 publications and suggest that it too fails to do justice to the linguistic data. I speculate that Semantic Representations should be given the form (more or less) of computer programs, describable in Dana Scott's mathematical semantics for programming languages. (shrink)

This textbook offers the first unified treatment of wave propagation in electronic and electromagnetic systems and introduces readers to the essentials of the transfer matrix method, a powerful analytical tool that can be used to model and study an array of problems pertaining to wave propagation in electrons and photons. It is aimed at graduate and advanced undergraduate students in physics, materials science, electrical and computer engineering, and mathematics, and is ideal for researchers in photonic crystals, negative index (...) materials, left-handed materials, plasmonics, nonlinear effects, and optics. Peter Markos and Costas Soukoulis begin by establishing the analogy between wave propagation in electronic systems and electromagnetic media and then show how the transfer matrix can be easily applied to any type of wave propagation, such as electromagnetic, acoustic, and elastic waves. The transfer matrix approach of the tight-binding model allows readers to understand its implementation quickly and all the concepts of solid-state physics are clearly introduced. Markos and Soukoulis then build the discussion of such topics as random systems and localized and delocalized modes around the transfer matrix, bringing remarkable clarity to the subject. Total internal reflection, Brewster angles, evanescent waves, surface waves, and resonant tunneling in left-handed materials are introduced and treated in detail, as are important new developments like photonic crystals, negative index materials, and surface plasmons. Problem sets aid students working through the subject for the first time. (shrink)

An adequate cerebellar theory should explain the timing and geometry of signal propagation in the molecular layer, hence Braitenberg et al.'s explanation of how parallel fibers may act as delay lines is important. The suggestion that these delay lines may generate control signals that dampen undesirable response modes during movements is merely interesting.

Periods of transition are often symbolically associated with death, making the latter the paradigm of liminality. Yet, many volumes on death in the social sciences and humanities do not specifically address liminality. This book investigates these "ultimate ambiguities," assuming they can pose a threat to social relationships because of the disintegrating forces of death, but they are also crucial periods of creativity, change, and emergent aspects of social and religious life. Contributors explore death and liminality from an interdisciplinary perspective and (...) present a global range of historical and contemporary case studies outlining emotional, cognitive, artistic, social, and political implications. (shrink)

In this paper, we investigate non-homogeneous wave equations in fractional space-time domains of space dimension _D_, \(0 and time dimension \(\beta\), \(0. We write the wave equations in terms of potential functions and non-zero source terms. For scalar source terms, the potential functions are also scalar functions, and for vector source terms, the potential functions are vector functions. We derived an expression for the wave to propagate from the source point to the observation point. The study shows that the time (...) for a wave to propagate from the source point to the observation point in a fractional space-time domain could be different from that in an integer order space-time domain. (shrink)

Hooking up is a term commonly used in contemporary American society to refer to sexual activity between two people who are not in a committed romantic relationship. Data show that although many college students are engaging in hookups, there is no consensus on how to define a hookup. The author uses the concept of “strategic ambiguity” to explore the intentionality and usefulness of the vagueness of this term. Specific to hookups, strategic ambiguity is when individuals use the term (...) “hookup” to describe their sexual activities rather than give details about their sexual activities as an impression management strategy to protect their sexual and social identities. Analyzing data gathered through interviews with heterosexual students at a mid-sized public university in the South, this article addresses the normative character and the myriad definitions of hookups; addresses the underlying heterosexist bias in the definitions of hookups; and analyzes how the ambiguity of the term “hookup” serves women and men in different ways and both reinforces and challenges the current gender order, allowing men to conform to and preserve components of hegemonic masculinity and women to conform to and preserve components of emphasized femininity. (shrink)