Results for ' octagon'

37 found
Order:
  1.  5
    El octagon medieval de oposición y equivalencia: tres aplicaciones / The Medieval Octagon of Opposition and Equivalence: Three Applications.Juan M. Campos Benítez - 2010 - Revista Española de Filosofía Medieval 17:129.
    I describe an octagon of opposition and equivalence developed by fourteenth-century logicians, in particular by Jean Buridan in his Summulae de dialectica. This «square» of opposition displays complex logical relations, one of which is not found in the traditional square of opposition. The octagon allows expression of three kinds of sentences: quantified modal sentences, oblique sentences, and sentences with quantified predicates. The octagon shows that medieval logicians were working with a logic of relations, an identity logic, and (...)
    No categories
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  2.  7
    Medieval Octagons and the Disparatae Sentences.Juan Manuel Campos Benítez - 2018 - Revista Española de Filosofía Medieval 25:143-155.
    In this paper the medieval octagons of opposition and equivalence are described and analized. One of them, the octagon for quantified predicates, is the simplest one and offers the pattern for the other two, the octagon for predicate with modal qualification and the octagon for quantified genitive and nominative sentences. Thus, the first is the princeps analogum for the other two, whose structure is more complex. Then we describe an internal square inside the octagon, the square (...)
    No categories
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  3.  26
    The octagon of opposition.Edward A. Hacker - 1975 - Notre Dame Journal of Formal Logic 16 (3):352-353.
  4. Another Side of Categorical Propositions: The Keynes–Johnson Octagon of Oppositions.Amirouche Moktefi & Fabien Schang - 2023 - History and Philosophy of Logic 44 (4):459-475.
    The aim of this paper is to make sense of the Keynes–Johnson octagon of oppositions. We will discuss Keynes' logical theory, and examine how his view is reflected on this octagon. Then we will show how this structure is to be handled by means of a semantics of partition, thus computing logical relations between matching formulas with a semantic method that combines model theory and Boolean algebra.
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark   2 citations  
  5.  43
    The Modal Octagon and John Buridan's Modal Ontology.Spencer Johnston - 2016 - In Jean-Yves Béziau & Gianfranco Basti (eds.), The Square of Opposition: A Cornerstone of Thought. Basel, Switzerland: Birkhäuser. pp. 35-52.
    In this paper we will argue that the ontology implicit in John Buridan’s modal octagon commits him to a form of contingentism. In particular, we will argue that Buridan is committed to denying the validity of the Barcan and converse Barcan formulae.
    Direct download  
     
    Export citation  
     
    Bookmark   1 citation  
  6. El octagon medieval de oposición y equivalencia: tres aplicaciones.Juan Manuel Campos Benítez - 2010 - Revista Española de Filosofía Medieval 17:129-142.
    En el presente artículo describo un octágono de oposición y equivalencia desarrollado por lógicos del siglo XIV, especialmente por Jean Buridan en su Summulae de dialectica. Dicho �cuadro� de oposición ofrece relaciones lógicas muy complejas, alguna de las cuales no está presente en el cuadrado tradicional de oposición. El octágono nos servirá para expresar tres tipos de oraciones: oraciones modales cuantificadas, oraciones oblicuas y oraciones con cuantificación explícita del predicado. El octágono muestra que la lógica medieval del siglo XIV ofrece (...)
     
    Export citation  
     
    Bookmark  
  7.  5
    The Lost Octagons of the Pantheon: Images and Evidence.Carolyn Yerkes - 2014 - Journal of the Warburg and Courtauld Institutes 77 (1):115-143.
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  8.  48
    John Buridan’s Theory of Consequence and His Octagons of Opposition.Stephen Read - 2012 - In Jean-Yves Béziau & Dale Jacquette (eds.), Around and Beyond the Square of Opposition. Springer Verlag. pp. 93--110.
    One of the manuscripts of Buridan’s Summulae contains three figures, each in the form of an octagon. At each node of each octagon there are nine propositions. Buridan uses the figures to illustrate his doctrine of the syllogism, revising Aristotle's theory of the modal syllogism and adding theories of syllogisms with propositions containing oblique terms (such as ‘man’s donkey’) and with ‘propositions of non-normal construction’ (where the predicate precedes the copula). O-propositions of non-normal construction (i.e., ‘Some S (some) (...)
    Direct download  
     
    Export citation  
     
    Bookmark   8 citations  
  9.  34
    Boolean considerations on John Buridan's octagons of opposition.Lorenz Demey - 2018 - History and Philosophy of Logic 40 (2):116-134.
    This paper studies John Buridan's octagons of opposition for the de re modal propositions and the propositions of unusual construction. Both Buridan himself and the secondary literature have emphasized the strong similarities between these two octagons (as well as a third one, for propositions with oblique terms). In this paper, I argue that the interconnection between both octagons is more subtle than has previously been thought: if we move beyond the Aristotelian relations, and also take Boolean considerations into account, then (...)
    Direct download (7 more)  
     
    Export citation  
     
    Bookmark   5 citations  
  10.  60
    The Medieval Octagon of Opposition for Sentences with Quantified Predicates.Juan Manuel Campos Benítez - 2014 - History and Philosophy of Logic 35 (4):354-368.
    The traditional Square of Opposition consists of four sentence types. Two are universal and two particular; two are affirmative and two negative. Examples, where ‘S’ and ‘P’ designate the subject and the predicate, are: ‘every S is P’, ‘no S is P’, ‘some S is P’ and ‘some S is not P’. Taking the usual sentences of the square of opposition, quantifying over their predicates exhibits non-standard sentence forms. These sentences may be combined into non-standard Squares of Opposition , and (...)
    Direct download (6 more)  
     
    Export citation  
     
    Bookmark   2 citations  
  11.  4
    Aristotelian and Boolean Properties of the Keynes-Johnson Octagon of Opposition.Lorenz Demey & Hans Smessaert - forthcoming - Journal of Philosophical Logic:1-26.
    Around the turn of the 20th century, Keynes and Johnson extended the well-known square of opposition to an octagon of opposition, in order to account for subject negation (e.g., statements like ‘all non-S are P’). The main goal of this paper is to study the logical properties of the Keynes-Johnson (KJ) octagons of opposition. In particular, we will discuss three concrete examples of KJ octagons: the original one for subject-negation, a contemporary one from knowledge representation, and a third one (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  12.  10
    The Philosophy of Mixed Martial Arts: Squaring the Octagons The Philosophy of Mixed Martial Arts: Squaring the Octagons, edited by Holt, Jason and Ramsay, Marc, Routledge: New York, 2022, 180pp., $160 (hardback), $44.05 (ebook), ISBN- 978-0-367-64163-4. [REVIEW]Fabricio Boscolo Del Vecchio & Evandro Barbosa - 2023 - Journal of the Philosophy of Sport 50 (3):454-457.
    The Philosophy of Mixed Martial Arts: Squaring the Octagon, edited by Jason Holt and Mark Ramsay, is part of the Ethics and Sport Routledge book series. It is a general academic text that encompass...
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  13.  18
    The Philosophy of Mixed Martial Arts: Squaring the Octagon.Jason Holt & Marc Ramsay (eds.) - 2021 - Routledge.
    This is the first book to pay MMA the serious philosophical attention it deserves. The book explores topics such as whether MMA qualifies as a martial art, the differences between MMA and the traditional martial arts, the aesthetic dimensions of MMA, the limits of consent and choice in MMA and whether MMA can promote moral virtues.
    No categories
    Direct download  
     
    Export citation  
     
    Bookmark  
  14.  8
    Breakdown of semi-classical conduction theory in approximants of the octagonal tiling.G. Trambly de Laissardière, C. Oguey & D. Mayou - 2011 - Philosophical Magazine 91 (19-21):2778-2786.
    No categories
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   1 citation  
  15.  64
    Why Care beyond the Square? Classical and Extended Shapes of Oppositions in Their Application to „Introspective Disputes“.Sascha Benjamin Fink - 2016 - In Jean-Yves Béziau & Gianfranco Basti (eds.), The Square of Opposition: A Cornerstone of Thought (Studies in Universal Logic). Cham, Switzerland: Birkhäuser. pp. 325-337.
    So called “shapes of opposition”—like the classical square of opposition and its extensions—can be seen as graphical representations of the ways in which types of statements constrain each other in their possible truth values. As such, they can be used as a novel way of analysing the subject matter of disputes. While there have been great refinements and extensions of this logico-topological tool in the last years, the broad range of shapes of opposition are not widely known outside of a (...)
    Direct download  
     
    Export citation  
     
    Bookmark   1 citation  
  16.  49
    Applications of squares of oppositions and their generalizations in philosophical analysis.Jan Woleński - 2008 - Logica Universalis 2 (1):13-29.
    . This papers examines formal properties of logical squares and their generalizations in the form of hexagons and octagons. Then, several applications of these constructions in philosophical analysis are elaborated. They concern contingency (accidentality), possibility, permission, axiological concepts (bonum and malum), the generalized Hume thesis (deontic and epistemic modalities), determinism, truth and consistency (in various senses. It is shown that relations between notions used in various branches of philosophy fall into the same formal scheme.
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark   5 citations  
  17.  18
    Logical Analogies: Interpretations, Oppositions, and Probabilism.Walter Redmond - 2019 - Philosophies 4 (2):13.
    I present two logical systems to show the “analogy of proportionality„ common to several interpretations: modality (necessity and possibility), quantification, truth-functional relations, moral attitudes (deontic logic), states of knowledge (epistemic logic), and states of belief (doxastic logic). To display the two underlying analogical relations, I call upon the originally Scholastic convention, recently put to use again, of using squares, hexagons, and octagons “of opposition„. A combined epistemic–deontic logic happens to be found in the traditional “probabilist„ theory of the “good conscience„, (...)
    No categories
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark  
  18.  38
    Logical Squares for Classical Logic Sentences.Urszula Wybraniec-Skardowska - 2016 - Logica Universalis 10 (2-3):293-312.
    In this paper, with reference to relationships of the traditional square of opposition, we establish all the relations of the square of opposition between complex sentences built from the 16 binary and four unary propositional connectives of the classical propositional calculus. We illustrate them by means of many squares of opposition and, corresponding to them—octagons, hexagons or other geometrical objects.
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark   4 citations  
  19.  44
    A Cube of Opposition for Predicate Logic.Jørgen Fischer Nilsson - 2020 - Logica Universalis 14 (1):103-114.
    The traditional square of opposition is generalized and extended to a cube of opposition covering and conveniently visualizing inter-sentential oppositions in relational syllogistic logic with the usual syllogistic logic sentences obtained as special cases. The cube comes about by considering Frege–Russell’s quantifier predicate logic with one relation comprising categorical syllogistic sentence forms. The relationships to Buridan’s octagon, to Aristotelian modal logic, and to Klein’s 4-group are discussed.GraphicThe photo shows a prototype sculpture for the cube.
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   1 citation  
  20.  29
    De logische geometrie van Johannes Buridanus' modale achthoek.Lorenz Demey & Philipp Steinkrüger - 2017 - Tijdschrift Voor Filosofie 79 (2):217-238.
    In order to elucidate his logical analysis of modal quantified propositions (e.g. ‘all men are necessarily mortal’), the 14th century philosopher John Buridan constructed a modal octagon of oppositions. In the present paper we study this modal octagon from the perspective of contemporary logical geometry. We argue that the modal octagon contains precisely six squares of opposition as subdiagrams, and classify these squares based on their logical properties. On a more abstract level, we show that Buridan’s modal (...)
    Direct download  
     
    Export citation  
     
    Bookmark   1 citation  
  21.  10
    DUMAND: Neutrinos from Beneath the Ocean.John Cramer - unknown
    In this AV column we will have a look at the DUMAND project, a new $10 million detector funded by the US Department of Energy for the detection of ultra-high energy neutrinos. DUMAND stands for Deep Underwater Muon And Neutrino Detector. It is now under construction in Hawaii and will come into operation in 1993-94. It is to be placed almost 3 miles deep on a level stretch of Pacific Ocean bottom about 18 miles west of Keahole Point on the (...)
    No categories
    Direct download  
     
    Export citation  
     
    Bookmark  
  22.  11
    Revisiting the church of Saint Spyridon in Selymbria.Görkem Günay - 2021 - Byzantinische Zeitschrift 114 (1):171-194.
    Although nothing from the Byzantine church of St. Spyridon is preserved in situ today, the primary sources and surviving photographs of the structure indicate that it was built in the simple domed octagon design. In this article, some new architectural fragments which possibly belonged to the church are presented and evaluated, and new interpretations of the earlier restitution hypotheses are suggested. The presence of a domed octagon in Selymbria provides indirect evidence for the existence of the plan scheme (...)
    No categories
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  23.  30
    The Ethics of Belief [review of Timothy J. Madigan, W.K. Clifford and “The Ethics of Belief” ].Sylvia Nickerson - 2009 - Russell: The Journal of Bertrand Russell Studies 29 (2):188-190.
    In lieu of an abstract, here is a brief excerpt of the content:April 3, 2010 (11:17 am) C:\Users\Milt\Desktop\backup copy of Ken's G\WPData\TYPE2902\russell 29,2 050 red.wpd 188 Reviews 1 A.yW. Brown, The Metaphysical Society (New York: Octagon, 1973), pp. 180–1. THE ETHICS OF BELIEF Sylvia Nickerson History & Philosophy of Science & Technology / U. of Toronto Toronto, on, Canada m5s 1k1 [email protected] Timothy J. Madigan. W.yK. CliVord and “The Ethics of Beliefz”. Newcastle, uk: CambridgeScholars Publishing, 2009. Pp. [x], 202. (...)
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark  
  24.  57
    History of Religion Becomes Ethnology: Some Evidence from Peiresc's Africa.Peter N. Miller - 2006 - Journal of the History of Ideas 67 (4):675-696.
    In lieu of an abstract, here is a brief excerpt of the content:Journal of the History of Ideas 67.4 (2006) 675-696 MuseSearchJournalsThis JournalContents[Access article in PDF]History of Religion Becomes Ethnology: Some Evidence from Peiresc's AfricaPeter N. Miller Bard Graduate CenterAbstractThe relationship between history of religion and ethnology on the one hand, and antiquarianism and them both, on the other, lie at the core of this essay. These lines of inquiry come together in the work of Nicolas Fabri de Peiresc (1580-1637), (...)
    Direct download (6 more)  
     
    Export citation  
     
    Bookmark   1 citation  
  25.  56
    An electrostatic interpretation of some empirical parameters of light quarks.D. M. Eagles - 1978 - Foundations of Physics 8 (5-6):417-421.
    Values of some arbitrary parameters appearing in a geometrical model for elementary particles developed by MacGregor are compared with quantities associated with classical properties of blocks of charges±e interacting via Coulomb forces and hard-sphere repulsion only. If it is assumed that masses and radii of individual charged particles are related bymc 2=(2/3)(e 2/r) and thatmc 2=6.87 MeV, then the self-energiesM andM ± of 24-particle neutral blocks and 25-particle charged blocks composed of layers of three octagons and of a square sandwiched (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark  
  26.  21
    Improving institutional research ethics capacity assessments: lessons from sub-Saharan Africa.Adnan A. Hyder, Nelson Sewankambo, Charles Michelo, Nthabiseng Phaladze, Nancy Kass, Joseph Ali & Molly Deutsch-Feldman - 2020 - Global Bioethics 31 (1):120-132.
    ABSTRACT The amount of biomedical research being conducted around the world has greatly expanded over the past 15 years, with particularly large growth occurring in low- and middle-income countries (LMICs). This increased focus on understanding and responding to disease burdens around the world has brought forth a desire to help LMIC institutions enhance their own capacity to conduct scientifically and ethically sound research. In support of these goals the Johns Hopkins-Fogarty African Bioethics Training Program (FABTP) has, for the past six (...)
    No categories
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark  
  27. A Commentary on Eugene Thacker’s "Cosmic Pessimism".Gary J. Shipley & Nicola Masciandaro - 2012 - Continent 2 (2):76-81.
    continent. 2.2 (2012): 76–81 Comments on Eugene Thacker’s “Cosmic Pessimism” Nicola Masciandaro Anything you look forward to will destroy you, as it already has. —Vernon Howard In pessimism, the first axiom is a long, low, funereal sigh. The cosmicity of the sigh resides in its profound negative singularity. Moving via endless auto-releasement, it achieves the remote. “ Oltre la spera che piú larga gira / passa ’l sospiro ch’esce del mio core ” [Beyond the sphere that circles widest / penetrates (...)
     
    Export citation  
     
    Bookmark  
  28.  61
    The Exoteric Square of Opposition.Jean-Yves Beziau & Ioannis Vandoulakis (eds.) - 2022 - Birkhauser.
    The theory of the square of opposition has been studied for over 2,000 years and has seen a resurgence in new theories and research since the second half of the twentieth century. This volume collects papers presented at the Sixth World Congress on the Square of Opposition, held in Crete in 2018, developing an interdisciplinary exploration of the theory. Chapter authors explore subjects such as Aristotle’s ontological square, logical oppositions in Avicenna’s hypothetical logic, and the power of the square of (...)
    Direct download  
     
    Export citation  
     
    Bookmark   1 citation  
  29.  65
    The Square of Opposition: A Cornerstone of Thought.Jean-Yves Béziau & Gianfranco Basti (eds.) - 2016 - Basel, Switzerland: Birkhäuser.
    This is a collection of new investigations and discoveries on the theory of opposition (square, hexagon, octagon, polyhedra of opposition) by the best specialists from all over the world. The papers range from historical considerations to new mathematical developments of the theory of opposition including applications to theology, theory of argumentation and metalogic.
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark   4 citations  
  30.  11
    Aristotelian and Duality Relations Beyond the Square of Opposition.Lorenz6 Demey & Hans5 Smessaert - 2004 - In A. Blackwell, K. Marriott & A. Shimojima (eds.), Diagrammatic Representation and Inference. Springer.
    © Springer International Publishing AG, part of Springer Nature 2018. Nearly all squares of opposition found in the literature represent both the Aristotelian relations and the duality relations, and exhibit a very close correspondence between both types of logical relations. This paper investigates the interplay between Aristotelian and duality relations in diagrams beyond the square. In particular, we study a Buridan octagon, a Lenzen octagon, a Keynes-Johnson octagon and a Moretti octagon. Each of these octagons is (...)
    No categories
    Direct download  
     
    Export citation  
     
    Bookmark   4 citations  
  31. The very idea of material constitution.Lynne Rudder Baker - unknown
    We run into instances of material constitution everywhere we turn. Material constitution is the relation that obtains between an octagonal piece of metal and a Stop sign, between strands of DNA molecules and genes, between pieces of paper and dollar bills, between stones and monuments, between lumps of clay and statues, between human persons and their bodies—the list is endless. Although there has been a great deal of controversy recently about the nature of material constitution, I want to enter the (...)
    Direct download  
     
    Export citation  
     
    Bookmark   2 citations  
  32.  25
    The Word of God in One’s Hand: Touching and Holding Pendant Koran Manuscripts.Cornelius Berthold - 2020 - Das Mittelalter 25 (2):338-357.
    Koran manuscripts that fit comfortably within the palm of one’s hand are known as early as the 10th century CE.For the sake of convenience, all dates will be given in the common era (CE) without further mention, and not in the Islamic or Hijra calendar. Their minute and sometimes barely legible script is clearly not intended for comfortable reading. Instead, recent scholarship suggests that the manuscripts were designed to be worn on the body like pendants or fastened to military flag (...)
    No categories
    Direct download  
     
    Export citation  
     
    Bookmark  
  33.  22
    The Wise Master Builder: Platonic Geometry in Plans of Medieval Abbeys and Cathedrals. [REVIEW]John Heilbron - 2002 - Isis 93:111-112.
    The main conclusion of Nigel Hiscock's important but ill‐arranged book is that the ground plans of abbeys and cathedrals of the tenth and eleventh centuries incorporate Platonic wisdom—hence the “wise” in the title catchwords, which come from Paul's first letter to the Corinthians . There Paul likens himself to a sapiens architectus who lays the foundations on which others erect the building. In three of the four translations in The Complete Parallel Bible, however, Paul does not declare himself wise but, (...)
    Direct download  
     
    Export citation  
     
    Bookmark  
  34. Experimentation, distributed cognition, and flow: A scientific lens on mixed martial arts.Zachary Agoff, Benjamin Gweyer & Vadim Keyser - 2021 - In Jason Holt & Marc Ramsay (eds.), The Philosophy of Mixed Martial Arts: Squaring the Octagon. Routledge.
    Recent work by Keyser in applied epistemology of experiment has focused on the iterative ‘production’ of knowledge: knowledge stabilizes within a given physical context and it is iteratively tested within that context to meet standards of reliability. This implies that in a given physical context (e.g., laboratory), the inferences, methods/techniques, and physical products form coherence relations with one another. We apply this epistemological stabilization account to the martial arts in order to argue that the context of stabilization dictates the training (...)
    No categories
     
    Export citation  
     
    Bookmark  
  35. The Illusion of Reincarnation.Giuseppe Baroetto - 2016 - In Octagon II - The Quest for Wholeness. pp. 265-272.
    What is 'rebirth' in Buddhism? The contribution of hypnotic regression.
     
    Export citation  
     
    Bookmark  
  36. on the martial arts status of mixed martial arts: 'There are no rules'.Sarah Malanowski & Nicholas Baima - 2021 - In Jason Holt & Marc Ramsay (eds.), The Philosophy of Mixed Martial Arts: Squaring the Octagon. Routledge. pp. 16-29.
    Many traditional martial artists assert that MMA is not a martial art, denying that the ‘martial skill’ of MMA constitutes a ‘martial art’, and citing the sportive and entertainment aspects of MMA competitions as antithetical to the spirit of martial arts, lacking the integrity, discipline, and tradition found in martial arts. Today, these criticisms are even more relevant in light of the fact that the typical MMA fighter no longer practices a single discipline but is versed in a variety of (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  37. Ethics of Mixed Martial Arts.Walter Veit & Heather Browning - 2021 - In Jason Holt & Marc Ramsay (eds.), The Philosophy of Mixed Martial Arts: Squaring the Octagon. Routledge. pp. 134-149.
    No categories
    Direct download  
     
    Export citation  
     
    Bookmark   5 citations