15 found
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  1.  10
    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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  2.  59
    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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  3.  44
    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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  4.  41
    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.  89
    Serious Actualism.Yannis Stephanou - 2007 - Philosophical Review 116 (2):219-250.
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  6. How Many Possible Worlds Are There?Yannis Stephanou - 2000 - Analysis 60 (3):223–228.
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  7.  60
    Necessary Beings.Yannis Stephanou - 2000 - Analysis 60 (2):188–193.
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  8.  67
    Review: Aristotle on Meaning and Essence. [REVIEW]Yannis Stephanou - 2002 - Mind 111 (444):841-847.
  9.  59
    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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  10.  24
    Book Notice. [REVIEW]Yannis Stephanou - 2013 - Metascience 22 (2):455-456.
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  11.  23
    Modal Trees.Yannis Stephanou - 2011 - Metascience 20 (2):385-388.
  12.  23
    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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  13.  21
    Logic Problems.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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  14.  6
    Aristotle on Meaning and Essence.Yannis Stephanou - 2002 - Mind 111 (444):841-847.
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  15. 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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