Although the type‐I interferon (IFN‐I) response is considered vertebrate‐specific, recent findings about the Intracellular Pathogen Response (IPR) in nematode Caenorhabditis elegans indicate that there are similarities between these two transcriptional immunological programs. The IPR is induced during infection with natural intracellular fungal and viral pathogens of the intestine and promotes resistance against these pathogens. Similarly, the IFN‐I response is induced by viruses and other intracellular pathogens and promotes resistance against infection. Whether the IPR and the IFN‐I response evolved in a (...) divergent or convergent manner is an unanswered and exciting question, which could be addressed by further studies of immunity against intracellular pathogens in C. elegans and other simple host organisms. Here we highlight similar roles played by RIG‐I‐like receptors, purine metabolism enzymes, proteotoxic stressors, and transcription factors to induce the IPR and IFN‐I response, as well as the similar consequences of these defense programs on organismal development. (shrink)

The role of gene expression in evolutionary adaptation has been a subject of debate for over 40 years.cis‐regulation of transcription has been proposed to be the primary source of morphological novelty in evolution, though this is based on only a handful of examples. Recently the first genome‐wide studies of gene expression adaptation have been published, giving us an initial global view of this process. Systematic studies such as these will allow a number of key questions currently facing the field of (...) gene expression evolution to be addressed. (shrink)

This note responds to an interpretation of Mohist Canon and Explanation B 671 published by John Makeham some years ago. Makeham’s interpretation makes significant contributions to our understanding of this passage, especially in calling attention to problems with two influential previous interpretations, those of A. C. Graham and Chad Hansen.3 Yet his reading presents difficulties of its own, which I will attempt to rectify here.

Do non‐symmetric relations apply to the objects they relate in an order? According to the standard view of relations, the difference between aRb and bRa obtaining, where R is non‐symmetric, corresponds to a difference in the order in which the non‐symmetric relation R applies to a and b. Recently Kit Fine has challenged the standard view in his important paper ‘Neutral Relations’ arguing that non‐symmetric relations are neutral, lacking direction or order. In this paper I argue that Fine cannot account (...) for the application of non‐symmetric relations to their relata; so far from being neutral, these relations are inherently directional. (shrink)

The Mohist Canons are a set of brief statements on a variety of philosophical and other topics by anonymous members of the Mohist school , an influential philosophical, social, and religious movement of China's Warring States period (479-221 B.C.). [1] Written and compiled most likely between the late 4th and mid 3rd century B.C., the Canons are often referred to as the “later Mohist” or “Neo-Mohist” canons, since they seem chronologically later than the bulk of the Mohist writings, most of (...) which are probably from the mid-5th to the late 4th century. The.. (shrink)

Each world faith tradition has its own distinctive relationship with science, and the science-religion dialogue benefits from a greater awareness of what this relationship is. In this book, members of the International Society for Science and Religion (ISSR) offer international and multi-faith perspectives on how new discoveries in science are met with insights regarding spiritual realities.The essays reflect the conviction that “religion and science each proceed best when they’re pursued in dialogue with each other, and also that our fragmented and (...) divided world would benefit more from a stronger dialogue between science and religion.” In Part One, George F. R. Ellis, John C. Polkinghorne, and Holmes Rolston III, each a Templeton Prize winner, discuss their views on why the science and religion dialogue matters. They are joined in Part Two by distinguished theologians Fraser Watts and Philip Clayton, who place the dialogue in an international context; John Polkinghorne’s inaugural address to the ISSR in 2002 is also included. In Part Three, five members of the ISSR look at the distinctive relationships of their faiths to science: •Carl Feit on Judaism •Munawar Anees on Islam •B.V. Subbarayappa on Hinduism •Trinh Xuan Thuan on Buddhism •Heup Young Kim on Asian Christianity George Ellis, the recently elected second president of ISSR, summarizes the contributions of his colleagues. Ronald Cole-Turner then concludes the book with a discussion of the future of the science and religion dialogue. (shrink)

The “School of Names” ming jia ) is the traditional Chinese label for a diverse group of Warring States (479-221 B.C.) thinkers who shared an interest in language, disputation, and metaphysics. They were notorious for logic-chopping, purportedly idle conceptual puzzles, and paradoxes such as “Today go to Yue but arrive yesterday” and “A white horse is not a horse.” Because reflection on language in ancient China centered on “names”.

Mohism was an ancient Chinese philosophical movement founded in the fifth century B.C.E. by the charismatic artisan Mozi, or "Master Mo." The Mohists advanced a consequentialist ethics that anticipated Western utilitarianism by more than two thousand years and developed fascinating logical, epistemological, and political theories that set the terms of philosophical debate in China for generations. They were the earliest thinkers to outline a just war doctrine and to explain the origin of government from a state of nature. Their epistemology (...) and psychology provide intriguing alternatives to contemporary Western mentalism. The Philosophy of the Mozi is an extensive study of Mohism that immerses readers in the Mohist worldview, situates the movement's rise and decline within Chinese history, and highlights its relevance to modern thought. (shrink)

According to philosophical folklore Ramsey maintained three propositions in his famous 1925 paper “Universals”: (i) there is no subject-predicate distinction; (ii) there is no particular-universal distinction; (iii) there is no particular-universal distinction because there is no subject-predicate distinction. The ‘first generation’ of Ramsey commentators dismissed “Universals” because they held that whereas predicates may be negated, names may not and so there is a subject-predicate distinction after all. The ‘second generation’ of commentators dismissed “Universals because they held that the absence of (...) a merely linguistic distinction between subject and predicate does not provide any kind of reason for doubting that a truly ontological (i.e. non-linguistic) distinction obtains between particulars and universals. But both first and second-generation criticisms miss their marks because Ramsey did not maintain the three identified propositions. The failure of commentators to appreciate the point and purpose of the position Ramsey actually advanced in “Universals” results from (a) failing to consider the range of different arguments advanced there, (b) looking at “Universals” in isolation from Ramsey’s other papers and (c) failing to consider Ramsey’s writings in the context of the views that Russell and Wittgenstein held during the early 1920s. Seen from this wider perspective Ramsey arguments in “Universals” take on an altogether different significance. They not only anticipate important contemporary developments⎯the resurgence of Humeanism and the doctrine that the existence of universals can only be established a posteriori⎯but also point beyond them. (shrink)

Following the experimental discovery of the Higgs boson, physicists explained the discovery to the public by appealing to analogies with condensed matter physics. The historical root of these analogies is the analogies to models of superconductivity that inspired the introduction of spontaneous symmetry breaking into particle physics in the early 1960s. We offer a historical and philosophical analysis of the analogies between the Higgs model of the electroweak interaction and the Ginsburg-Landau and Bardeen-Cooper-Schrieffer models of superconductivity, respectively. The conclusion of (...) our analysis is that both sets of analogies are purely formal in virtue of the fact that they are accompanied by substantial physical disanalogies. In particular, the formal analogies do not map the temporal, causal, or modal structures of SSB in superconductivity to temporal, causal, or modal structures in the Higgs model. These substantial physical disanalogies mean that analogies to models of superconductivity cannot supply the basis for the physical interpretation of EW SSB; however, an appreciation of the contrast between the physical interpretations of SSB in superconductivity and the Higgs model does help to clarify some foundational issues. Unlike SSB in superconductivity, SSB in the Higgs sector of the Standard Model is neither a temporal nor a causal process. We discuss the implications for the `eating' metaphor for mass gain in the Higgs model. Furthermore, the distinction between the phenomenological GL model and the dynamical BCS model does not carry over to EW models, which clarifies the desiderata for so-called `dynamical' models of EW SSB. Finally, the development of the Higgs model is an illuminating case study for philosophers of science because it illustrates how purely formal analogies can play a fruitful heuristic role in physics. (shrink)

There are three different degrees to which we may allow a systematic theory of the world to embrace the idea of relatedness—supposing realism about non-symmetric relations as a background requirement. (First Degree) There are multiple ways in which a non-symmetric relation may apply to the things it relates—for the binary case, aRb ≠ bRa. (Second Degree) Every such relation has a distinct converse—for every R such that aRb there is another relation R* such that bR*a. (Third Degree) Each one of (...) them applies in an order to the things it relates—with regard to the state that results from R's applying to a and b, either R applies to a first and b second, or it applies to b first and a second. Whereas the first degree is near-indubitable, embracing the second or third generates unwholesome consequences. The second degree embodies a commitment to the existence of a superfluity of distinct converses and states to which such relations give rise. The third degree embodies commitment to recherché facts of the matter about how the states that arise from the application of one non-symmetric relation compare to any other. It is argued that accounts that purport to offer an analysis of the first degree generate unwelcome second or third degree consequences. This speaks in favour of our adopting an account of the application of relations that's not an analysis at all, an account that takes the first degree as primitive. (shrink)

The present state of ethical theory and practice is disquieting. Objectivism, in all its varieties, is unconvincing, and subjectivism, hedonic or emotive, is intellectually incredible and socially intolerable. No one is ethically content—except the dogmatist and the sceptic, who act willy nilly with the exponents of “might-cum-persuasion makes right.” Can we find a happier middle region between these inhospitable poles? Perhaps the very limitations of human valuation will provide the ground that ethics requires. Let us begin by considering the conditions (...) which must hold if ethical action is to be possible: 1. Only if the agent can provide a justifying reason for his choice of action can he claim to act ethically. For ethical action is a species of purposive action, and to act purposively entails the ability to give justifying reasons for one's choice of action. . Thus ethical action presupposes putatively grounded ethical judgment. 2. Justifying reasons must be acknowledgeable by all competent judges, i.e. by all persons who are acquainted with all relevant knowledge of the nature and consequences of the alternative courses of action, allow as far as possible for congenital, cultural and idiosyncratic bias, are capable of sane and serious reflection, and are able to make survey of their experience and to draw conclusions from it. For the judgment “the action A is ethically preferable to its alternatives B ” entails “A ought to be done” which in turn entails “every competent judge is capable of acknowledging the ground of the judgment ‘A is ethically preferable to B’ and consequently would be able to set himself to perform A as an ethical act, .” We can assure ourselves of this requirement of acknowledgeability by observing that whenever we resolve, and not merely settle, an ethical disagreement, we have achieved not only a factual, predictive, valuational and attitudinal agreement between the disputants, but a joint acknowledgment of the ground of the ethical judgment. Without this, the agreement could not be said to be ethical, whether the judgment be right or wrong or neither, but merely an agreement to disagree, ethically. Unless ethical disagreement is in principle resolvable, ethical judgment is impossible, for we should be unable to claim that our choice ought to be acted upon. (shrink)

In the Western philosophical tradition, the earliest recognized paradoxes are attributed to Zeno of Elea (ca. 490–430 B.C.E.) and to Eubulides of Miletus (fl. 4th century B.C.E.). In the Chinese tradition, the earliest and most well-known paradoxes are ascribed to figures associated with the “School of Names” (ming jia 名家), a diverse group of Warring States (479–221 B.C.E.) thinkers who shared an interest in language, logic, and metaphysics. Their investigations led some of these thinkers to propound puzzling, paradoxical statements such (...) as “Today go to Yue but arrive yesterday,” “White horses are not horses,” and “Mountains and gorges are level.” Such paradoxes seem to have been intended to highlight fundamental features of reality or subtleties in semantic relations between words and things. Why were thinkers who advanced paradoxes categorized as a school of “names”? In ancient China, philosophical inquiry concerning language and logic focused on the use of “names” (ming 名, also terms, labels, or reputation) and their semantic relations to “stuff” (shi 實, also objects, features, events, or situations). Hence for classificatory purposes, second-century B.C.E. Han-dynasty archivists grouped together assorted pre-Han figures whose most prominent ideas seemed to concern the relation between names and stuff—or at least strange, unorthodox uses of names—and dubbed them a school or lineage (jia 家) devoted to the study of names. Unfortunately, both the label and the grouping are misleading. Historically, the school was a retrospective, taxonomical fiction. The figures classified under the “School of Names” never formed a distinct circle, movement, tradition, or line of influence devoted to any particular doctrine, theme, method, or way of life. Their intellectual interests overlapped at most only partly, while also overlapping extensively with those of texts associated with other schools or traditions, such as the Mohist “Dialectics” 墨辯, the Zhuangzi 莊子, the Xunzi 荀子, and the Annals of Lü Buwei 呂氏春秋. What perhaps does set the School of Names apart is that some (though not all) of the figures associated with it apparently delighted in propounding paradoxical or preposterous sayings, while the other texts just mentioned generally (though not exclusively) seek to explain and debunk such utterances. (shrink)

Maughn Rollins Gregory and Meghan Jane Laverty’s Gareth B. Matthews, The Child’s Philosopher explores the Philosophy for Children movement, and the way the work of Gareth B. Matthews carried forward its key components. In this paper, I consider the impact of Matthews’ embeddedness within a Western philosophical tradition, even as he strives mightily to propose a broad-minded approach to P4C. I draw upon the work of Amasa Philip Ndofirepi to explore the tensions and possibilities in reconciling Western and non-Western approaches (...) to P4C. I argue that the social contexts of culture, ethnicity, and nationality can serve to broaden P4C curricula and pedagogy, making it fit for schools in a liberal democratic society. (shrink)

I argue that 'deep' ecology (as exemplified by the work of Arnie Naess) involves three inter-related commitments: (1) to an ethics of nature or axiological anti-humanism in which natural entities, processes or systems can possess intrinsic value independently of human beings; (2) a metaphysical naturalism or anti-humanism in which human beings are themselves conceptualized as natural products; (3) a transformative aspect. Although (3) is sometimes cast in personal or psychological terms, I think the idea can be given a properly philosophical (...) reconstruction along the lines of a kind of Ideologiekritik. I give the examples of Heidegger and Adorno to show how deeply our understanding of nature has been corrupted, and hence the depth of conceptual transformation required correctly to conceive nature. But both these thinkers simultaneously demonstrate a hostility to metaphysical naturalism and therefore have ultimately limited value for deep ecology. I then outline three possible relations of axiological to metaphysical commitments: (a) the abandonment of naturalism about values; (b) a projective or transcendentally idealist account of values; (c) an account of values as themselves lodged within the operation of natural systems. My reconstruction of the Ideologiekritiker shows them belonging to (b). So that if deep ecology is to avoid (a), it must embrace (c). Deleuze is much touted by environmental philosophers as contributing to (c). I argue that this is correct, but that the axiological commitments Deleuze manifests in his account of nature are ultimately quite different from those to which deep ecologists appear sympathetic. (shrink)

Most philosophical discussion of the particle concept that is afforded by quantum field theory has focused on free systems. This paper is devoted to a systematic investigation of whether the particle concept for free systems can be extended to interacting systems. The possible methods of accomplishing this are considered and all are found unsatisfactory. Therefore, an interacting system cannot be interpreted in terms of particles. As a consequence, quantum field theory does not support the inclusion of particles in our ontology. (...) In contrast to much of the recent discussion on the particle concept derived from quantum field theory, this argument does not rely on the assumption that a particulate entity be localizable. (shrink)

It is shown that, if a, b are recursively enumerable degrees such that 0

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It is shown that there are incomparable Σ2 e-degrees a, b such that every e-degree strictly less than a is also less than b.

Further arguments are offered in defence of the position that the variant of quantum field theory (QFT) that should be subject to interpretation and foundational analysis is axiomatic quantum field theory. I argue that the successful application of renormalization group (RG) methods within alternative formulations of QFT illuminates the empirical content of QFT, but not the theoretical content. RG methods corroborate the point of view that QFT is a case of the underdetermination of theory by empirical evidence. I also urge (...) caution in extrapolating interpretive conclusions about QFT from the application of RG methods in other contexts (e.g., condensed matter physics). This paper replies to criticisms advanced by David Wallace, but aims to be self-contained. (shrink)

Essentially we show recent data to shed new light on the thorny controversy of how teeth arose in evolution. Essentially we show (a) how teeth can form equally from any epithelium, be it endoderm, ectoderm or a combination of the two and (b) that the gene expression programs of oral versus pharyngeal teeth are remarkably similar. Classic theories suggest that (i) skin denticles evolved first and odontode‐inductive surface ectoderm merged inside the oral cavity to form teeth (the ‘outside‐in’ hypothesis) or (...) that (ii) patterned odontodes evolved first from endoderm deep inside the pharyngeal cavity (the ‘inside‐out’ hypothesis). We propose a new perspective that views odontodes as structures sharing a deep molecular homology, united by sets of co‐expressed genes defining a competent thickened epithelium and a collaborative neural crest‐derived ectomesenchyme. Simply put, odontodes develop ‘inside and out’, wherever and whenever these co‐expressed gene sets signal to one another. Our perspective complements the classic theories and highlights an agenda for specific experimental manipulations in model and non‐model organisms. (shrink)

In 2009 Alexandra Rutherford presented readers with a much-needed post-revisionist interpretation of the the behaviorist movement by elucidating the ways in which social context affected popular acceptance of, and resistance to, the central tenants of B.F. Skinner’s psychological theories. By outlining the ways in which American culture both facilitated and hindered behaviorism success, Rutherford's "Beyond the Box: B.F. Skinnner's technology of behavior from laboratory to life, 1950s-1970s" provides an alternative to strictly intellectual histories of behaviorism by examining how technological approaches (...) to behaviour were employed within a multitude of public forums, and emphasizing the importance of changing American attitudes towards technology, consumer culture and ethics. (shrink)

Nearly four decades after David Raynor attributed to David Hume an allegorical Scots militia pamphlet from the early 1760s popularly known as Sister Peg, there is still no scholarly consensus about whether the author was in fact Hume or his friend Adam Ferguson. Using new evidence that has emerged since the appearance of Raynor’s edition in 1982 – including information about Sister Peg’s publication history, Ferguson’s handwritten corrections and revisions in the Abbotsford copy of the work, a 1767 newspaper article (...) by James Boswell and a copy of a 1775 letter by Sir John Dalrymple that both named Ferguson as the author, two volumes of Ferguson’s correspondence published in 1995, and a recently discovered letter by Ferguson from 1809 – this article seeks to resolve this controversy by establishing that Sister Peg was written by Ferguson, as his fellow militia agitator Alexander Carlyle asserted in his memoirs. In the process, the article refutes Raynor’s arguments about Ferguson’s supposed incapacity for writing a satirical pamphlet like Sister Peg and clarifies the nature of Hume’s views and actions in regard to the Scots militia cause during the Seven Years’ War. The article also throws light on several related issues affecting Hume and Ferguson’s circle. (shrink)

What kind of turn is the turn to ethics? A Right turn? A Left turn? A wrong turn? A U-turn? Ethics is back in literary studies, philosophy, and political theory. Where critiques of universal man and the autonomous human subject had, in recent years, produced a resistance to ethics in many fields of scholarship, today these critiques have generated a crossover among disciplines and led to theories and practices that see and do ethics otherwise. The decentering of the subject, the (...) contributors to this volume suggest, has brought about a recentering of the ethical. The philosophers, political theorists, literary critics and physician whose essays are collected here bring the particularities of their disciplines and training to a vital complex of questions. Many of these authors express concerns that the turn to ethics is a turn away from politics towards moralism. All ultimately conclude, however, that such concerns, rather than leading away from ethics, have helped to reinvigorate the intellectual field in the present moment. Contributors: Judith Butler, Homi K. Bhabha, Lawrence Buell, Nancy Fraser, John Guillory, Beatrice Hanssen, Barbara Johnson, Perri Klass, Chantal Mouffe, Doris Sommer, Rebecca Walkowitz. (shrink)

In ‘The Authorship of Sister Peg', David Raynor relies on circumstantial evidence, unsubstantiated hypotheses, and subjective analysis in an effort to dispute my article ‘Let Margaret Sleep' and claim the authorship of Sister Peg for David Hume. This reply focusses instead on the large body of documentary and testimonial evidence that has surfaced during the past forty years, which overwhelmingly and convincingly supports the attribution of Sister Peg to Adam Ferguson. New documentary evidence includes Ferguson's emendations in Sir Walter Scott's (...) copy of Sister Peg, an 1809 letter from Ferguson to Alexander Fraser Tytler and Tytler's response to it, and information about the early publishing history of the work – as well as a letter by Hume himself about his preoccupation with another project when Sister Peg was written. While no new contemporary testimonials alleging Hume's authorship have been discovered since the publication of Raynor's edition of Sister Peg in 1982, at least nine contemporary testimonials naming Ferguson as the author are now known. This reply refutes Raynor's attempts to discredit the most famous of these testimonials – the account of Ferguson's authorship in the memoirs of Alexander Carlyle – and shows that the others cannot be reduced to Carlyle’s influence. (shrink)

A recent book about Agricola's conquest of Scotland presents a Scottish historian's take on a subject that has been dominated by archaeologists: the whereabouts of Mons Graupius, the scene of Agricola's final battle. Unfortunately, in confidently locating it in Perthshire, author James Fraser builds his case on shaky foundations.

Russell Goodman examines the curious reemergence of pragmatism in a field dominated in the past decades by phenomenology, logic, positivism, and deconstruction. With contributions from major contemporary and classical thinkers such as Cornel West, Richard Rorty, Nancy Fraser, Charles Sanders Peirce, and Ralph Waldo Emerson Russell has gathered an impressive chorus of philosophical voices that reexamine the origins and complexities of neo-pragmatism. The contributors discuss the relationship between pragmatism and literary theory, phenomenology, existentialism, and the work of Ralph Waldo (...) Emerson. They question the meaning of pragmatics, what it is to be practical, and ask provocative questions such as: what is reading? and whether or not democracy is a precondition for the functioning of intelligence. This work places this reemergent and interesting neo-development in its proper context and will provide readers with a strong sense of the movement's foundations, history, and subtlities. (shrink)

The Past Masters Søren Kierkegaard : Samlede Vårker database is based on the third edition of Kierkegaard's complete works in Danish, and has been edited by Professor Alistair McKinnon of McGill University.

Book Symposium on Andrew Feenberg’s Between Reason and Experience: Essays in Technology and Modernity Content Type Journal Article Pages 203-226 DOI 10.1007/s13347-011-0017-8 Authors Inmaculada de Melo-Martín, Division of Medical Ethics, Weill Cornell Medical College, New York, NY 10065, USA David B. Ingram, Loyola University Chicago, 6525 North Sheridan Road, Chicago, IL 60626, USA Sally Wyatt, e-Humanities Group, Royal Netherlands Academy of Arts and Sciences (KNAW) & Maastricht University, Cruquiusweg 31, 1019 AT Amsterdam, The Netherlands Yoko Arisaka, Forschungsinstitut für Philosophie Hannover, (...) Gerberstrasse 26, 30169 Hannover, Germany Andrew Feenberg, School of Communication, Simon Fraser University at Harbour Centre, 515 West Hastings Street, Vancouver, BC V6B 5K3, Canada Journal Philosophy & Technology Online ISSN 2210-5441 Print ISSN 2210-5433 Journal Volume Volume 24 Journal Issue Volume 24, Number 2. (shrink)

Não é novidade no ambiente acadêmico as reticências da teórica crítica Nancy Fraser para com a teoria da justiça de John Rawls. Mais especificamente, sua desconfiança é que a justiça rawlsiana não seja capaz de capturar devidamente a complexidade das desigualdades sociais nas sociedades contemporâneas: seja porque sua teoria moral (da justiça) é presumidamente descolada de uma teoria social de fundo; seja porque sua teoria moral (da justiça) é considerada reducionista (ou “monista”). Porém, o espírito do presente artigo não (...) é de aprofundar suas diferenças metodológicas, mas sim colocar as bases para se pensar possíveis “semelhanças de família” entre suas concepções de justiça. Afinal, ambas as formulações se apresentam como abordagens “deontológicas”, ou seja, que priorizam o correto (o justo) sobre o bem. Na primeira seção, retorna-se ao célebre debate redistribuição e reconhecimento, onde Fraser apresenta as novas abordagens liberais – com destaque à de Rawls - como as principais representantes do paradigma redistributivo no cenário contemporâneo. Ao mergulhar nessas passagens, é possível revelar precisamente quais os pontos de concordância e discordância de Fraser para com a teoria deontológica de Rawls. Dando continuidade, na segunda seção é explorado sua principal discordância: o presumido “reducionismo” da teoria da justiça rawlsiana à dimensão redistributiva (econômica), aqui chamada de crítica do reducionismo redistributivo. Se essa objeção procede ou não é objeto da terceira e última seção. Nela, é argumentado que mesmo que as preocupações normativas de Fraser (quanto ao problema do reducionismo) sejam válidas, ainda assim, esse problema não se aplica à teoria rawlsiana. Ao contrário, é argumentado que é possível encontrar “semelhanças de família” entre as concepções de Fraser e Rawls: (a) no seu alicerce e compromisso com o pluralismo, (b) na sua investigação e defesa do status igualitário entre as pessoas e, finalmente, (c) na constatação que o ideal normativo da igualdade democrática entre as pessoas (ou paridade de participação) requer dos arranjos institucionais não somente a redistribuição de recursos e bens econômicos, como também elementos de qualidades diferentes. (shrink)