17 found
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  1. Aristotle on Meaning and Essence.Yannis Stephanou - 2002 - Mind 111 (444):841-847.
  2. Serious Actualism.Yannis Stephanou - 2007 - Philosophical Review 116 (2):219-250.
  3.  37
    An Argument for Existentialism.Yannis Stephanou - 2020 - Acta Analytica 35 (4):507-520.
    Existentialism about propositions is the view that a proposition expressed in a sentence containing a nonempty name or indexical depends ontologically on the referent of the name or indexical: the proposition could not exist if the referent did not. The paper focuses on names. It discusses some arguments for existentialism and then presents a novel one. That argument does not presuppose that propositions have constituents, and it could be accepted by those who hold broadly Fregean views about names. It shows (...)
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  4.  74
    First-Order Modal Logic with an 'Actually' Operator.Yannis Stephanou - 2005 - Notre Dame Journal of Formal Logic 46 (4):381-405.
    In this paper the language of first-order modal logic is enriched with an operator @ ('actually') such that, in any model, the evaluation of a formula @A at a possible world depends on the evaluation of A at the actual world. The models have world-variable domains. All the logics that are discussed extend the classical predicate calculus, with or without identity, and conform to the philosophical principle known as serious actualism. The basic logic relies on the system K, whereas others (...)
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  5.  56
    Indexed Actuality.Yannis Stephanou - 2001 - Journal of Philosophical Logic 30 (4):355-393.
    The word 'actually' often refers to what is in fact the case, but it also often points to what would have been the case in a possible situation that is being envisaged. To capture such nuances, the formal languages discussed in the paper add subscripts to modal operators; in the model theory the subscripts allow an actuality operator to turn the evaluation of a formula to a world introduced by a preceding possibility or necessity operator having the same subscript. The (...)
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  6.  72
    The Meaning of 'Actually'.Yannis Stephanou - 2010 - Dialectica 64 (2):153-185.
    The paper is an investigation into the concept of actuality from the standpoint of the philosophy of language. It is argued that expressions such as 'actually' and 'in fact' are not indexicals like 'here' and 'now'; when e.g. 'Snow is actually white' is uttered in a world, what proposition is conveyed does not depend on the world. Nor are such expressions ambiguous. The paper makes a suggestion about the role that 'actually' and its cognates do play. It is also argued (...)
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  7.  8
    ‘Actually’ Again.Yannis Stephanou - 2022 - Ratio 35 (2):104-111.
    Ratio, Volume 35, Issue 2, Page 104-111, June 2022.
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  8.  90
    Necessary Beings.Yannis Stephanou - 2000 - Analysis 60 (2):188–193.
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  9.  33
    Investigations Into Quantified Modal Logic.Yannis Stephanou - 2002 - Notre Dame Journal of Formal Logic 43 (4):193-220.
    In this paper, I investigate a system of quantified modal logic, due in many respects to Bressan (see [2]), from several perspectives -- both semantic and proof-theoretic. As Anderson and Belnap note in [1]: "It seems to be generally conceded that formal systems are natural or substantial if they can be looked at from several points of view. We tend to think of systems as artificial or ad hoc if most of their formal properties arise from some one notational system (...)
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  10. How Many Possible Worlds Are There?Yannis Stephanou - 2000 - Analysis 60 (3):223–228.
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  11.  31
    Modal Trees: Rod Girle: Modal Logics and Philosophy, Second Edition, Durham, Acumen, 2009, Pp. Viii+248, £19.99 PB.Yannis Stephanou - 2011 - Metascience 20 (2):385-388.
  12.  27
    A Propositional Theory of Truth.Yannis Stephanou - 2018 - Notre Dame Journal of Formal Logic 59 (4):503-545.
    The liar and kindred paradoxes show that we can derive contradictions if our language possesses sentences lending themselves to paradox and we reason classically from schema about truth: Sis true iffp, where the letter p is to be replaced with a sentence and the letter S with a name of that sentence. This article presents a theory of truth that keeps at the expense of classical logic. The theory is couched in a language that possesses paradoxical sentences. It incorporates all (...)
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  13.  17
    Classical Logic and the Liar.Yannis Stephanou - forthcoming - Logic and Logical Philosophy:1.
    The liar and kindred paradoxes show that we can derive contradictions when we reason in accordance with classical logic from the schema (T) about truth: S is true iff p, where ‘p’ is to be replaced with a sentence and ‘S’ with a name of that sentence. The paper presents two arguments to the effect that the blame lies not with (T) but with classical logic. The arguments derive contradictions using classical logic, but instead of appealing to (T), they invoke (...)
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  14.  43
    Book Notice: Brian Garrett: Elementary Logic. Durham: Acumen, 2012, Viii+183pp, ₤14.24 PB. [REVIEW]Yannis Stephanou - 2013 - Metascience 22 (2):455-456.
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  15.  32
    Logic Problems: Dale Jacquette: Logic and How It Gets That Way. Durham: Acumen, 2010, Xiv+306pp, £40.00 HB.Yannis Stephanou - 2011 - Metascience 20 (3):501-504.
    Logic problems Content Type Journal Article Pages 1-4 DOI 10.1007/s11016-011-9538-0 Authors Yannis Stephanou, Department of Philosophy and History of Science, University of Athens, University Campus, 157 71 Athens, Greece Journal Metascience Online ISSN 1467-9981 Print ISSN 0815-0796.
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  16.  73
    Model Theory and Validity.Yannis Stephanou - 2000 - Synthese 123 (2):165-193.
    Take a formula of first-order logic which is a logical consequence of some other formulae according to model theory, and in all those formulae replace schematic letters with English expressions. Is the argument resulting from the replacement valid in the sense that the premisses could not have been true without the conclusion also being true? Can we reason from the model-theoretic concept of logical consequence to the modal concept of validity? Yes, if the model theory is the standard one for (...)
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  17.  3
    The Meaning of ‘Actually’.Yannis Stephanou - 2010 - Dialectica 64 (2):153-185.
    The paper is an investigation into the concept of actuality from the standpoint of the philosophy of language. It is argued that expressions such as ‘actually’ and ‘in fact’ are not indexicals like ‘here’ and ‘now’; when e.g. ‘Snow is actually white’ is uttered in a world, what proposition is conveyed does not depend on the world. Nor are such expressions ambiguous. The paper makes a suggestion about the role that ‘actually’ and its cognates do play. It is also argued (...)
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