We introduce a logic BI in which a multiplicative (or linear) and an additive (or intuitionistic) implication live side-by-side. The propositional version of BI arises from an analysis of the proof-theoretic relationship between conjunction and implication; it can be viewed as a merging of intuitionistic logic and multiplicative intuitionistic linear logic. The naturality of BI can be seen categorically: models of propositional BI's proofs are given by bicartesian doubly closed categories, i.e., categories which freely combine the semantics of propositional intuitionistic (...) logic and propositional multiplicative intuitionistic linear logic. The predicate version of BI includes, in addition to standard additive quantifiers, multiplicative (or intensional) quantifiers ∀ new and ∃ new which arise from observing restrictions on structural rules on the level of terms as well as propositions. We discuss computational interpretations, based on sharing, at both the propositional and predicate levels. (shrink)

One might poetically muse that computers have the essence both of logic and machines. Through the case of the history of Separation Logic, we explore how this assertion is more than idle poetry. Separation Logic works because it merges the software engineer’s conceptual model of a program’s manipulation of computer memory with the logical model that interprets what sentences in the logic are true, and because it has a proof theory which aids in the crucial problem of scaling the reasoning (...) task. Scalability is a central problem, and some would even say the central problem, in appli- cations of logic in computer science. Separation Logic is an interesting case because of its widespread success in verification tools. For these two senses of model—the engineering/conceptual and the logical—to merge in a genuine sense, each must maintain their norms of use from their home disciplines. When this occurs, both the logic and engineering benefit greatly. Seeking this intersection of two different senses of model provides a strategy for how computer scientists and logicians may be successful. Furthermore, the history of Separation Logic for analysing programs provides a novel case for philosophers of science of how software engineers and computer scientists develop models and the components of such models. We provide three contributions: an exploration of the extent of models merging that is necessary for success in computer science; an introduction to the technical details of Separation Logic, which can be used for reasoning about other exhaustible resources; and an introduction to the problems, process, and results of computer scientists for those outside the field. (shrink)

Hayek argued that the central question of economics is the coordination problem: How does the spontaneous interaction of many purposeful individuals, each having dispersed bits of subjective knowledge, generate an order in which the actors' subjective data are coordinated in a way that enables them to dovetail their plans and activities successfully? In attempting to solve this problem, Hayek outlined an approach to economic theorizing that takes seriously the limited, subjective nature of human knowledge. Despite purporting to have appropriated Hayek's (...) thought by acknowledging the information-transmitting role of prices, mainstream economists have missed Hayek's point. The predominant tool of formal economics—equilibrium analysis—begins by assuming the data held by actors to have been pre-reconciled, and so evades the problem to be solved. Even the more advanced tools for modeling knowledge in economic analysis, such as the economics of information, assume away either the subjectivism of knowledge and expectations (rendering the coordination of beliefs and plans a trivial matter) or the frictions and “imperfections” of reality (rendering the coordination problem indeterminate). (shrink)

This book is a collection of secondary essays on America's most important philosophic thinkers—statesmen, judges, writers, educators, and activists—from the colonial period to the present. Each essay is a comprehensive introduction to the thought of a noted American on the fundamental meaning of the American regime.

Adults and infants display a robust ability to perceive the unity of a center-occluded object when the visible ends of the object undergo common motion (e.g. Kellman, P.J., Spelke, E.S., 1983. Perception of partly occluded objects in infancy. Cognitive Psychology 15, 483±524). Ecologically oriented accounts of this ability focus on the primacy of motion in the perception of segregated objects, but Gestalt theory suggests a broader possibility: observers may perceive object unity by detecting patterns of synchronous change, of which common (...) motion is a special case. We investigated this possibility with observations of adults and 4-month-old infants. Participants viewed a center-occluded object whose visible surfaces were either misaligned or aligned, stationary or moving, and unchanging or synchronously changing in color or bright- ness in various temporal patterns (e.g. ¯ashing). Both alignment and common motion con- tributed to adults' perception of object unity, but synchronous color changes did not. For infants, motion was an important determinant of object unity, but other synchronous changes and edge alignment were not. When a stationary object with aligned edges underwent syn- chronous changes in color or brightness, infants showed high levels of attention to the object, but their perception of its unity appeared to be indeterminate. An inherent preference for fast over slow ¯ash rates, and a novelty preference elicited by a change in rate, both indicated that infants detected the synchronous changes, although they failed to use them as information for object unity. These ®ndings favor ecologically oriented accounts of object perception in which surface motion plays a privileged role. Ó 1999 Elsevier Science B.V. All rights reserved. (shrink)

Over the last ten years, „Theory U″, written by C.O. Scharmer in 2007, has earned broad international recognition. However, critical reviews of its grounding in social sciences and philosophy have been rare. After a brief introduction to Theory U this article examines its methodic approach in the context of its references to the universal history of Toynbee, and epistemological sources in the works of Nietzsche, Capra, Varela, Husserl, and Steiner. The investigation of Theory U’s historical and philosophical grounding comes to (...) the conclusion that it is evidently falling short of adequately capturing real world complexity and does not match widely accepted academic standards. Despite its evident deficiencies, Theory U deserves the merit of uniquely embracing non conventional schools of thought beyond the mainstream literature on leadership theories. (shrink)

After encountering this book, you will never look at the tiniest sliver of your own backyard or neighborhood park the same way; instead, you will be stunned by the unexpected variety of species found in an area so small.

Reviews : Clare O'Farrell, Foucault—Historian or Philosopher? ; James W. Bernauer, Michel Foucault's Force of Flight: Toward an Ethics for Thought ; Paul Rabinow, French Modern: Norms and Forms of the Social Environment ; Jonathon Crary, Techniques of the Observer: On Vision and Modernity in the Nineteenth Century.

Otto Neurath (1882-1945) was a highly unorthodox thinker both in philosophy and economics. The contributions to this sparkling new book conclude that Neurath touched on many of the most critical problems of economic theory during its formative years as a modern discipline. His economics provide insights into the foundational problems of modern economics and should encourage contemporary economic theorists to critically reflect their own hidden presumptions.

Philosophy and Kafka is a collection of original essays interrogating the relationship of literature and philosophy. The essays either discuss specific philosophical commentaries on Kafka’s work, consider the possible relevance of certain philosophical outlooks for examining Kafka’s writings, or examine Kafka’s writings in terms of a specific philosophical theme, such as communication and subjectivity, language and meaning, knowledge and truth, the human/animal divide, justice, and freedom.

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

Em "Teoria da vanguarda", de Peter Bürger, o choque é compreendido como o artifício intencional dos movimentos de vanguarda contra a autonomia do esteticismo modernista, a fim de devolver a arte à práxis vital. Adotando uma perspectiva distinta, o choque, para Adorno, expõe antes a crise da experiência da formalização do tempo decorrente da incongruência entre as forças produtivas e as relações de produção na sociedade industrial, sendo que dois caminhos artísticos distintos derivam da inflexão histórica da crise da (...) experiência. Em Schoenberg, na esteira do que Bürger classificaria como esteticismo, o choque seria amortizado pela expansão da linguagem musical, mediante seu registro. Em Stravinsky, o procedimento mecânico de golpes rítmicos e de montagem, em consonância com a profusão de vivências do choque, surge como elemento regressivo. Os choques não seriam dispositivos críticos, mas sismogramas de reações às mudanças da consciência subjetiva do tempo na modernidade. O artigo procura enfatizar as premissas conflitantes entre Bürger e Adorno quanto à posição do conceito de choque, assim como as críticas de Bürger ao modernismo adorniano. In Peter Bürger's "Theory of the avant-garde", the concept of shock is rendered as an intentional avant-garde procedure against the institutionalization of art, i.e., against the autonomous criteria of modernist aestheticism, with the purpose of bringing art back to everyday life and vital praxis. From a quite different materialistic perspective, the concept of shock, in Adorno's musical writings, exposes the crisis of experience (Erfahrung) of the dissociation of time within two major streams of modern music, namely Schoenberg's school and Stravinsky's. This paper aims to point out the conflicting assumptions and consequences between Adorno and Bürger regarding their respective theoretical grasps on the concept of shock, as well as the critique to Adorno's musical modernism that Bürger addresses in this book. (shrink)

Celem pracy jest omówienie rozwoju koncepcji na temat roli logiki formalnej z punktu widzenia filozofii marksistowskiej. Można zaryzykować twierdzenie, że ogólnie biorąc, każdy system filozoficzny "zmusza" wyznawców lub zwolenników do określania pozycji w odniesieniu do innych nauk. Jeśli zaś idzie o stosunek filozofii marksistowskiej do logiki formalnej to w ostatnim półwieczu znaleźć można aż trzy koncepcje na ten temat. I tak, w latach dwudziestych i trzydziestych logika formalna uważana była przez marksistów za teoretyczny wyraz antydialektycznego sposobu myśli burżuazyjnej. Kolejny okres (...) - lata pięćdziesiąte i sześćdziesiąte to okres godzenia logiki formalnej i dialektyki i wreszcie w latach sześćdziesiątych i siedemdziesiątych zdecydowano się na odseparowanie tych dwóch rzeczy. (shrink)

This article reports on a conversation convened by Quentin Skinner at the invitation of the Editors of The Journal of Political Philosophy and held in Cambridge on 13 February 2001.

Peter van Inwagen has long claimed that he doesn’t understand substitutional quantification and that the notion is, in fact, meaningless. Van Inwagen identifies the source of his bewilderment as an inability to understand the proposition expressed by a simple sentence like “,” where “$\Sigma$” is the existential quantifier understood substitutionally. I should think that the proposition expressed by this sentence is the same as that expressed by “.” So what’s the problem? The problem, I suggest, is that van Inwagen (...) takes traditional existential quantification to be ontologically committing and substitutional quantification to be ontologically noncommitting, which requires that the two quantifiers have different meanings—but no different meaning for the substitutional quantifier is forthcoming. What van Inwagen fails to appreciate is that substitutional quantification is directed at a criterion of ontological commitment, namely, W. V. O. Quine’s, which is quite different from van Inwagen’s criterion. Substitutional quantification successfully avoids the commitments Quine’s criterion would engender but has the same commitments as existential quantification given van Inwagen’s criterion. The question, then, is whether the existential quantifier is ontologically committing, as van Inwagen believes. The answer to that question will depend on whether the ordinary language “there is/are,” which is codified by the existential quantifier, is ontologically committing. There are good reasons to doubt that it is. (shrink)

In the following paper, the meaning of philosophy as a specific intellectual activity would be presented on the example of revolutionary thoughts of Peter Tkachov. The paper concerns with the understanding of philosophy, its characteristics and status within the Russian intellectual movement in the second half of the 19th century. The understanding of both, individual and social functions of philosophy in the work of Tkachov revolutionary writing, is introduced. The paper is set within a wider framework of Thachov thoughts (...) and his idea of progress. After connecting these two specific topics of Tkachov, the question is formulated: Who is capable to answer the question of what is progress? While looking for an answer and studying works of Tkachov, a wide spectrum of possible variations is offered. The work is purposely conceptualized with an opened closure to present a concrete problem for further analysis and discussion. (shrink)

For some of the world's great thinkers, including Aristotle, Aquinas, and Hegel, philosophy is a vast system of fixed, capital-T Truth for humankind to discover, explore and comprehend. For others, even among those with philosophies as diverse as William James and Ludwig Wittgenstein, philosophy is simply a tool, or a process for ascertaining individual factual truths specific to a given time and place. It is often said that if you ask any ten philosophers to define their subject, you're likely to (...) get ten different answers. Here, presented for non-specialist readers, is an easy-to-understand survey of ideas put forth by 100 important philosophers, from the pre-Socratics of ancient Greece to the analytic philosophers of the present day. Each thinker is summarized in a single illustrated page, or in many instances, in a two-page spread. Each entry includes the philosopher's birth and death dates, titles of major works, major influences, a capsule biographical sketch, and a brief summary of his or her most important ideas. In addition to philosophers in our own Western tradition, readers will find Chinese sages, including Confucius and Lao-tzu, the Indian Buddhist philosopher Ngrjuna, and thinkers representing other cultures. Just a few of the 100 important thinkers represented in this book are: Plato Aristotle Augustine of Hippo Roger Bacon Thomas Aquinas Thomas Hobbes John Locke Rene Descartes Baruch Spinoza Immanuel Kant G.W.F. Hegel Friedrich Nietzsche William James Ludwig Wittgenstein Martin Heidegger Jean-Paul Sartre Alfred Jules Ayer Willard V.O. Quine Thomas Kuhn Donald Davidson and many othersThe text is enhanced with more than 250 illustrations and a glossary of philosophical terms. (shrink)

W Cambridge 21 grudnia 2013 r. zmarł Peter Thomas Geach – wybitna postać filozofii brytyjskiej i wielki przyjaciel Polski. Imię jego będę tu pisać po polsku, bo wiem, że byłby z tego rad. Znał nasz język i chętnie używał polskiej formy swojego imienia. Był polskim patriotą. Była to postać wielce charakterystyczna...

W artykule autor dowodzi, że argument Singera na rzecz utylitaryzmu jest chybiony i że poprawienie go wymaga wyciągnięcia nauki od Rousseau i Kanta. Autor wskazuje, że podobnie jak u Singera, argument Rousseau na rzecz umowy społecznej zawodzi, ponieważ nie udaje mu się połączyć opartego na interesie własnym punktu wyjścia z wnioskami o uspołecznieniu. Następnie autor dowodzi, że Kant rozwiązał problem Rousseau, przyjmując, że uspołecznienie było właściwe człowiekowi naturalnemu i podając w ten sposób koncepcję natury ludzkiej, w której jest miejsce dla (...) moralności. Singer musi zatem postąpić podobnie, żeby rozwiązać swój problem. Autor dowodzi dalej, że przyjęcie problematycznego punktu wyjścia w postaci założenia o egoizmie ludzi odzwierciedla wpływ ewolucyjnego naturalizmu na obu myślicieli. Błędem byłoby jednak zakładać, że ewolucyjny naturalizm wymaga takiego punktu wyjścia. Singer może więc poprawić swój argument, nie zdradzając jego ducha, ale nie ma gwarancji, że jego wniosek, który stanowi wyraz utylitaryzmu preferencji, nie ucierpi wskutek tych poprawek. (shrink)

Autor przeciwstawia się rozpowszechnionym w literaturze marksistowskiej poglądom, że prawa myślenia są tożsame z myślowym wyrażeniem praw. W związku z tym krytykuje tezę o jedności dialektyki, logiki i teorii poznania. Jego zdaniem specyficzne prawa myślenia istnieją równie obiektywnie jak prawa przyrody i społeczeństwa, regulując procesy myślowe niezależnie od wiedzy o nich. Należy więc wyraźnie odróżniać istnienie obiektywnych praw, zarówno specyficznych dla poszczególnych sfer rzeczywistości, jak też uniwersalnych (do tych należy prawa dialektyki) od powstałego w wyniku poznania ich myślowego wyrazu.

This paper examines the question whether foundational epistemology (“FE”) can be replaced by naturalized epistemology (“NE”). First, it argues that Quine's defense of NE is inadequate since it is only based on arguments showing the impossibility of the logical empiricist version of FE rather than on arguments for the impossibility of FE as such. Second, it proposes that a more promising argument for the impossibility of FE can be found in the Münchhausen-trilemma which aims at showing that ultimate foundations (and, (...) hence, FE) are unattainable. However, Karl-Otto Apel has shown that this trilemma is unconclusive since it uncritically presupposes the premise that all argumentation is deductive in nature. Apel's argument implies that FE is possible if and only if it is possible to devise a non-deductive foundation (“NDF”). It is argued, however, that the possibility of NDF cannot be demonstrated. This leads to a situation called the Multatuli-dilemma: we cannot prove the possibility of ultimate foundations nor can we prove the impossibility of ultimate foundations. This dilemma shows that the discussion about the possibility of FE is pointless. Thus, it suggests that it is legitimate to replace FE by NE. Barry Stroud and Henri Lauener, however, argue that this replacement is not feasible since NE is not capable of refuting scepticism (Stroud) or justifying methodological rules (Lauener). But these objections are shown to be mistaken: First, epistemological scepticism is practically impossible and, hence, does not pose a serious threat to NE. Second, NE is capable of justifying methodological norms if and only if it makes use of so-called internal justifications. Thus, the final conclusion of this paper is that FE can be replaced by NE. (shrink)

Wiadomo, że Peter Singer chce być rzecznikiem tego, co racjonalne. Z jego punktu widzenia najistotniejsza jest wiedza przyrodnicza, a za wartościowe zostają uznane tylko te rzeczy, które da się udowodnić. Zgodnie z racjonalistami świat powinien składać się z trzech elementów: wiedzy, technologii i ekonomii. Zatem, jedyna korzyść z wiedzy jest taka, kiedy to daje gotowe osiągnięcia. W tym ujęciu prawda, obiektywna prawda staje się czymś zbędnym. Wiedza i nauka stają się funkcją utylitarnych celów, które człowiek może osiągnąć. Wszystkie wartości (...) i normy, które nie mogą być zredukowane do kryteriów użyteczności, do praktycznych rezultatów są bezwartościowe. Peter Singer twierdzi, że moralnie znacząca jest zdolność do odczuwania bólu i chęć jego unikania. Sprawą najważniejszą jest zdolność do cierpienia i naturalna chęć jego uniknięcia. Singer opowiada się za utylitaryzmem preferencji w etyce. Ogólnie rzecz ujmując, chodzi o to, że ludzie pragną maksymalizować szczęście i unikać takich stanów, jak cierpienie. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:American Philosophy: The Basics by Nancy StanlickPeter [email protected] Stanlick. American Philosophy: The Basics. London: Routledge, 2013. 174 pp with index.In 174 pages American Philosophy: The Basics covers the American philosophical tradition from its European roots to some of its contemporary leanings. The stated goal of the book is to give an overview of American philosophy and “explain what makes American philosophy a national or cultural philosophical tradition.” This (...) is a particularly tall order for such a short book, and it might be understandable if Stan-lick necessarily omits numerous thinkers from the canon. Overall, the book succeeds at giving a quick overview of the history of American philosophy.The text covers a fairly diverse selection of philosophers. Starting from Jonathan Edwards’ Calvinist theology, the book moves through early American social and political thought, and the European enlightenment ideals that underwrite them, as found in revolutionary era thinkers such as Thomas Jefferson, Thomas Paine, and Benjamin [End Page 578] Franklin. The rest of the chapters quickly address New England transcendentalism and classical pragmatism. The book ends with two quick summaries of “recent” developments in American philosophy split between metaphysics, epistemology, and the philosophy of science; and a second section on social, political, and ethical writings. The latter section includes summaries of recent writings on feminist ethics and African American social thought. Although these themes are particularly welcome, the book would have benefited by addressing feminist and African American contributions not just to ethics or social thought, but also to debates in epistemology or the philosophy of science.The author’s intended audience is undergraduates taking an American philosophy course or those wholly uninformed about the American philosophical tradition. Although the book serves as a helpful summary of various views in the American intellectual tradition, it would need to be supplemented by a substantial amount of primary texts to provide enough course material for a semester. The text does not contain enough critical commentary to function as a secondary resource by itself, but could function alongside additional secondary material.This last point is particularly telling about the book’s goals. Stanlick manages to introduce and explain numerous classic philosophical problems throughout the text (e.g., the mind-body problem, the problem of freewill, arguments for God’s existence, etc…) and provides a glossary at the end of the book, but does not do much to explore any of the issues in-depth. In part this is because of the overview nature of the text, but additional explanations, as well as a longer list of secondary sources, would have gone a long way in strengthening the author’s overall approach. This is an interesting, and I think helpful, approach for a lower-level philosophy text: it provides clear exposition of philosophical terminology while never straying from the overall goal of exploring the American philosophical tradition.One initial problem is the author’s narrative commitment to what makes American philosophy uniquely American. Stanlick argues that what is indicative of American philosophy is more of an emphasis on “what we can do with theories, principles, and arguments” than with theoretical or abstract problems. While we may be able to see this emphasis in some of the classical pragmatists and early American intellectuals, I think it’s difficult to claim that such an emphasis is indicative of all American philosophy.Additionally, seemingly major American philosophers are simply absent. Though discussions of Charles Sanders Peirce, William James, John Dewey, and Richard Rorty compose the pragmatism chapter, no mention is made of C.I. Lewis or Sidney Hook. Recent pragmatists, outside of W.V.O Quine and Rorty, are missing from both the pragmatism chapter and later chapters on contemporary developments in American philosophy. It seems reasonable to expect some mention of [End Page 579] Robert Brandom’s analytic pragmatism, the contemporary revival of Peirce’s philosophy, Cheryl Misak’s extensive work on American pragmatism (although one of her edited volumes is mentioned in a “further readings” sections), Susan Haack’s epistemology, or Richard Shusterman’s work on embodiment and pragmatism. Although not American in genesis, 19th Hegelianism (as especially seen in the St. Louis and Ohio Hegelians) does not appear... (shrink)

In the 21st century, the screen - the Internet screen, the television screen, the video screen and all sorts of combinations thereof - will be booming in our visual and infotechno culture. Screen-based art, already a prominent and topical part of visual culture in the 1990s, will expand even more. In this volume, digital art - the new media - as well as its connectedness to cinema will be the subject of investigation. The starting point is a two-day symposium organized (...) by the Netherlands Media Art Institute Montevideo/TBA, in collaboration with the _L&B _ series and the Amsterdam School of Cultural Analysis. Issues which emerged during the course of investigation deal with questions such as: How could screen-based art be distinguished from other art forms? Could screen-based art theoretically be understood in one definite model or should one search for various possibilities and/or models? Could screen-based art be canonized? What are the physical and theoretical forms of representation for screen-based art? What are the idiosyncratic concepts geared towards screen-based art? This volume includes various arguments, positions, and statements by artists, curators, philosophers, and theorists. The participants are Marie-Luise Angerer, Annette W. Balkema, René Beekman, Raymond Bellour, Peter Bogers, Joost Bolten, Noël Carroll, Sean Cubitt, Cãlin Dan, Chris Dercon, Honoré d'O, Anne-Marie Duquet, Ken Feingold, Ursula Frohne, hARTware curators, Heiner Holtappels, Aernout Mik, Patricia Pisters, Nicolaus Schafhausen, Jeffrey Shaw, Peter Sloterdijk, Ed S. Tan, Barbara Visser and Siegfried Zielinski. (shrink)

O'Donnell, J. R. Anton Charles Pegis on the occasion of his retirement.--Conlan, W. J. The definition of faith according to a question of MS. Assisi 138: study and edition of text.--Spade, P. V. Five logical tracts by Richard Lavenham.--Maurer, A. Henry of Harclay's disputed question on the plurality of forms.--Brown, V. Giovanni Argiropulo on the agent intellect: an edition of Ms. Magliabecchi V 42.--Synan, E. A. The Exortacio against Peter Abelard's Dialogus inter philosophum, Iudaeum et Christianum.--Fitzgerald, W. Nugae Hyginianae.--Sheehan, (...) M. M. Marriage and family in English conciliar and synodal legislation.--Shook, L. K. Riddles relating to the Anglo-Saxon scriptorium.--Boyle, L. E. The De regno and the two powers.--Colledge, E. A Middle English Christological poem.--Gough, M. R. E. Three forgotten martyrs of Anazarbus in Cilicia.--Häring, N. Chartres and Paris revisited.--Hayes, W. Greek recentiores, (Ps.) Basil, Adversus eunomium, IV-V.--Owens, J. The physical world of Parmenides. (shrink)

This paper examines the possibilities for peripheral localities to achieve upward mobility in the world-system by “hooking on” to larger processes of world-system accumulation. In particular, is it possible for economies that are dependent on foreign investment to receive a flow of investments that is high enough to overcome the negative impacts of a high stock of foreign investment, thus enabling them to cross a threshold and achieve upward mobility in the world-system? An analysis of the recent experience of the (...) southern Irish “Celtic Tiger” economy during 1990-2000 indicates that such an upward movement is possible on the basis of massive foreign investment inflows. On closer examination, however, the Irish-type model appears to be highly deficient, because a high proportion of growth is illusionary and also on grounds of social desirability and lack of generalizability. (shrink)

sat es beatus In the aggressively philosophical poem 23, Catullus attempts to change Furius’ mind about how he perceives his poverty, ‘advice’ which has been identified as either Stoic or Epicurean. Irrespective of the precise school of thought, it is clear that the poet ridicules Furius in eudaimonistic language. The poet of social commentary seeks to define the beatus uir. In fact, the term beatus has rich philosophical resonance and Catullus uses it in several other poems where attitudes to wealth (...) form a significant backdrop to the poet's social posturing. Catullus was no philosopher. He employs the language and ideas of different schools, and, while his work does not reflect a coherent philosophical position, he was writing at a time when public discourse increasingly drew upon philosophical language and topoi. I will examine Catullus’ use of the term beatus in poems 9, 10, 22 and 23 to demonstrate that the poet draws a contrast between its different meanings across these pairs of adjacent poems. I will argue that Catullus contrasts the eudaimonistic and material meanings of the word to show the differences between clear-sighted wisdom and deceptive pleasures, between the good life and a life filled with goods. (shrink)