Order:
See also
Profile: Mark Jago (Nottingham University)
  1. Being Positive About Negative Facts.Mark Jago & Stephen Barker - 2012 - Philosophy and Phenomenological Research 85 (1):117-138.
    Negative facts get a bad press. One reason for this is that it is not clear what negative facts are. We provide a theory of negative facts on which they are no stranger than positive atomic facts. We show that none of the usual arguments hold water against this account. Negative facts exist in the usual sense of existence and conform to an acceptable Eleatic principle. Furthermore, there are good reasons to want them around, including their roles in causation, chance-making (...)
    Direct download (13 more)  
     
    Export citation  
     
    My bibliography   20 citations  
  2. Propositions as Truthmaker Conditions.Mark Jago - 2016 - Argumenta.
    Propositions are often aligned with truth-conditions. The view is mistaken, since propositions discriminate where truth conditions do not. Propositions are hyperintensional: they are sensitive to necessarily equivalent differences. I investigate an alternative view on which propositions are truthmaker conditions, understood as sets of possible truthmakers. This requires making metaphysical sense of merely possible states of affairs. The theory that emerges illuminates the semantic phenomena of samesaying, subject matter, and aboutness.
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography   1 citation  
  3. Recent Work in Relevant Logic.Mark Jago - 2013 - Analysis 73 (3):526-541.
    This paper surveys important work done in relevant logic in the past 10 years.
    Direct download (8 more)  
     
    Export citation  
     
    My bibliography   1 citation  
  4. Modal Realism, Still At Your Convenience.Mark Jago & Harold Noonan - 2016 - Analysis:anx037.
    Divers (2014) presents a set of de re modal truths which, he claims, are inconvenient for Lewisean modal realism. We argue that there is no inconvenience for Lewis.
    Direct download (4 more)  
     
    Export citation  
     
    My bibliography  
  5. Hyperintensional Propositions.Mark Jago - 2015 - Synthese 192 (3):585-601.
    Propositions play a central role in contemporary semantics. On the Russellian account, propositions are structured entities containing particulars, properties and relations. This contrasts sharply with the sets-of-possible-worlds view of propositions. I’ll discuss how to extend the sets-of-worlds view to accommodate fine-grained hyperintensional contents. When this is done in a satisfactory way, I’ll argue, it makes heavy use of entities very much like Russellian tuples. The two notions of proposition become inter-definable and inter-substitutable: they are not genuinely distinct accounts of how (...)
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography   4 citations  
  6. The Truthmaker Non-Maximalist's Dilemma.Mark Jago - 2012 - Mind 121 (484):903-918.
    Amongst those who feel the pull of the truthmaker principle (that truths require for their truth a truthmaker to exist), there is disagreement as to whether it applies to all truths or merely to some distinguished subset. Those in the latter camp, the non-maximalists, argue that there are no ducks in my bath is true not because of something’s existence, but because of the lack of ducks in my bath. Maximalists, by contrast, insist that truths are made true by something’s (...)
    Direct download (8 more)  
     
    Export citation  
     
    My bibliography   7 citations  
  7. The Content of Deduction.Mark Jago - 2013 - Journal of Philosophical Logic 42 (2):317-334.
    For deductive reasoning to be justified, it must be guaranteed to preserve truth from premises to conclusion; and for it to be useful to us, it must be capable of informing us of something. How can we capture this notion of information content, whilst respecting the fact that the content of the premises, if true, already secures the truth of the conclusion? This is the problem I address here. I begin by considering and rejecting several accounts of informational content. I (...)
    Direct download (8 more)  
     
    Export citation  
     
    My bibliography   3 citations  
  8. Impossible Worlds.Mark Jago - 2013 - Noûs 47 (3):713-728.
    Impossible worlds are representations of impossible things and impossible happenings. They earn their keep in a semantic or metaphysical theory if they do the right theoretical work for us. As it happens, a worlds-based account provides the best philosophical story about semantic content, knowledge and belief states, cognitive significance and cognitive information, and informative deductive reasoning. A worlds-based story may also provide the best semantics for counterfactuals. But to function well, all these accounts need use of impossible and as well (...)
    Direct download (9 more)  
     
    Export citation  
     
    My bibliography   1 citation  
  9. Against Yagisawa's Modal Realism.Mark Jago - 2013 - Analysis 73 (1):10-17.
    In his book Worlds and Individuals, Possible and Otherwise (2010), Takashi Yagisawa presents and argues for a novel and imaginative version of modal realism. It differs both from Lewis’s modal realism (Lewis 1986) and from actualists’ ersatz accounts (Adams 1974; Sider 2002). In this paper, I’ll present two arguments, each of which shows that Yagisawa’s metaphysics is incoherent. The first argument shows that the combination of Yagisawa’s metaphysics with impossibilia leads to triviality: every sentence whatsoever comes out true. This is (...)
    Direct download (9 more)  
     
    Export citation  
     
    My bibliography   4 citations  
  10. Essence and the Grounding Problem.Mark Jago - 2016 - In Reality Making. Oxford: Oxford University Press. pp. 99-120.
    Pluralists about coincident entities say that distinct entities may be spatially coincident throughout their entire existence. The most pressing issue they face is the grounding problem. They say that coincident entities may differ in their persistence conditions and in the sortals they fall under. But how can they differ in these ways, given that they share all their microphysical properties? What grounds those differences, if not their microphysical properties? Do those differences depend only on the way we conceptualise those objects? (...)
    Direct download  
     
    Export citation  
     
    My bibliography   1 citation  
  11. Alethic Undecidability Doesn’T Solve the Liar.Mark Jago - 2016 - Analysis 76 (3):278-283.
    Stephen Barker presents a novel approach to solving semantic paradoxes, including the Liar and its variants and Curry’s paradox. His approach is based around the concept of alethic undecidability. His approach, if successful, renders futile all attempts to assign semantic properties to the paradoxical sentences, whilst leaving classical logic fully intact. And, according to Barker, even the T-scheme remains valid, for validity is not undermined by undecidable instances. Barker’s approach is innovative and worthy of further consideration, particularly by those of (...)
    Direct download (7 more)  
     
    Export citation  
     
    My bibliography  
  12. The Problem of Rational Knowledge.Mark Jago - 2013 - Erkenntnis (S6):1-18.
    Real-world agents do not know all consequences of what they know. But we are reluctant to say that a rational agent can fail to know some trivial consequence of what she knows. Since every consequence of what she knows can be reached via chains of trivial cot be dismissed easily, as some have attempted to do. Rather, a solution must give adequate weight to the normative requirements on rational agents’ epistemic states, without treating those agents as mathematically ideal reasoners. I’ll (...)
    Direct download (4 more)  
     
    Export citation  
     
    My bibliography   2 citations  
  13. Monism and Material Constitution.Stephen Barker & Mark Jago - 2014 - Pacific Philosophical Quarterly 95 (1):189-204.
    Are the sculpture and the mass of gold which permanently makes it up one object or two? In this article, we argue that the monist, who answers ‘one object’, cannot accommodate the asymmetry of material constitution. To say ‘the mass of gold materially constitutes the sculpture, whereas the sculpture does not materially constitute the mass of gold’, the monist must treat ‘materially constitutes’ as an Abelardian predicate, whose denotation is sensitive to the linguistic context in which it appears. We motivate (...)
    Direct download (5 more)  
     
    Export citation  
     
    My bibliography   2 citations  
  14. Advanced Modalizing Problems.Mark Jago - 2016 - Mind 125 (499):627-642.
    I present an internal problem for David Lewis’s genuine modal realism. My aim is to show that his analysis of modality is inconsistent with his metaphysics. I consider several ways of modifying the Lewisian analysis of modality, but argue that none are successful. I argue that the problem also affects theories related to genuine modal realism, including the stage theory of persistence and modal fictionalism.
    Direct download (6 more)  
     
    Export citation  
     
    My bibliography  
  15. Hintikka and Cresswell on Logical Omniscience.Mark Jago - 2006 - Logic and Logical Philosophy 15 (3):325-354.
    I discuss three ways of responding to the logical omniscience problems faced by traditional ‘possible worlds’ epistemic logics. Two of these responses were put forward by Hintikka and the third by Cresswell; all three have been influential in the literature on epistemic logic. I show that both of Hintikka's responses fail and present some problems for Cresswell’s. Although Cresswell's approach can be amended to avoid certain unpalatable consequences, the resulting formal framework collapses to a sentential model of knowledge, which defenders (...)
    Direct download (7 more)  
     
    Export citation  
     
    My bibliography   2 citations  
  16. Constructing Worlds.Mark Jago - 2012 - Synthese 189 (1):59-74.
    You and I can differ in what we say, or believe, even though the things we say, or believe, are logically equivalent. Discussing what is said, or believed, requires notions of content which are finer-grained than sets of (metaphysically or logically) possible worlds. In this paper, I develop the approach to fine-grained content in terms of a space of possible and impossible worlds. I give a method for constructing ersatz worlds based on theory of substantial facts. I show how this (...)
    Direct download (7 more)  
     
    Export citation  
     
    My bibliography   3 citations  
  17. Are Impossible Worlds Trivial?Mark Jago - 2013 - In Vit Puncochar & Petr Svarny (eds.), The Logica Yearbook 2012. College Publications.
    Theories of content are at the centre of philosophical semantics. The most successful general theory of content takes contents to be sets of possible worlds. But such contents are very coarse-grained, for they cannot distinguish between logically equivalent contents. They draw intensional but not hyperintensional distinctions. This is often remedied by including impossible as well as possible worlds in the theory of content. Yet it is often claimed that impossible worlds are metaphysically obscure; and it is sometimes claimed that their (...)
    Direct download  
     
    Export citation  
     
    My bibliography  
  18. Logical Information and Epistemic Space.Mark Jago - 2009 - Synthese 167 (2):327 - 341.
    Gaining information can be modelled as a narrowing of epistemic space . Intuitively, becoming informed that such-and-such is the case rules out certain scenarios or would-be possibilities. Chalmers’s account of epistemic space treats it as a space of a priori possibility and so has trouble in dealing with the information which we intuitively feel can be gained from logical inference. I propose a more inclusive notion of epistemic space, based on Priest’s notion of open worlds yet which contains only those (...)
    Direct download (5 more)  
     
    Export citation  
     
    My bibliography   10 citations  
  19. The Problem with Truthmaker-Gap Epistemicism.Mark Jago - 2012 - Thought: A Journal of Philosophy 1 (4):320-329.
    Epistemicism about vagueness is the view that vagueness, or indeterminacy, is an epistemic matter. Truthmaker-gap epistemicism is the view that indeterminate truths are indeterminate because their truth is not grounded by any worldly fact. Both epistemicism in general and truthmaker-gap epistemicism originated in Roy Sorensen's work on vagueness. My aim in this paper is to give a characterization of truthmaker-gap epistemicism and argue that the view is incompatible with higher-order vagueness: vagueness in whether some case of the form ‘it is (...)
    Direct download (7 more)  
     
    Export citation  
     
    My bibliography   1 citation  
  20.  88
    Epistemic Logic for Rule-Based Agents.Mark Jago - 2009 - Journal of Logic, Language and Information 18 (1):131-158.
    The logical omniscience problem, whereby standard models of epistemic logic treat an agent as believing all consequences of its beliefs and knowing whatever follows from what else it knows, has received plenty of attention in the literature. But many attempted solutions focus on a fairly narrow specification of the problem: avoiding the closure of belief or knowledge, rather than showing how the proposed logic is of philosophical interest or of use in computer science or artificial intelligence. Sentential epistemic logics, as (...)
    Direct download (4 more)  
     
    Export citation  
     
    My bibliography   9 citations  
  21. Propositions and Same-Saying: Introduction.Rachael Briggs & Mark Jago - 2012 - Synthese 189 (1):1-10.
    Philosophers often talk about the things we say, or believe, or think, or mean. The things are often called ‘propositions’. A proposition is what one believes, or thinks, or means when one believes, thinks, or means something. Talk about propositions is ubiquitous when philosophers turn their gaze to language, meaning and thought. But what are propositions? Is there a single class of things that serve as the objects of belief, the bearers of truth, and the meanings of utterances? How do (...)
    Direct download (5 more)  
     
    Export citation  
     
    My bibliography   1 citation  
  22. The Cost of Truthmaker Maximalism.Mark Jago - 2013 - Canadian Journal of Philosophy 43 (4):460-474.
    According to truthmaker theory, particular truths are true in virtue of the existence of particular entities. Truthmaker maximalism holds that this is so for all truths. Negative existential and other ‘negative’ truths threaten the position. Despite this, maximalism is an appealing thesis for truthmaker theorists. This motivates interest in parsimonious maximalist theories, which do not posit extra entities for truthmaker duty. Such theories have been offered by David Lewis and Gideon Rosen, Ross Cameron, and Jonathan Schaffer. But these theories cannot (...)
    Direct download (4 more)  
     
    Export citation  
     
    My bibliography   2 citations  
  23. Setting the Facts Straight.Mark Jago - 2011 - Journal of Philosophical Logic 40 (1):33-54.
    Substantial facts are not well-understood entities. Many philosophers object to their existence on this basis. Yet facts, if they can be understood, promise to do a lot of philosophical work: they can be used to construct theories of property possession and truthmaking, for example. Here, I give a formal theory of facts, including negative and logically complex facts. I provide a theory of reduction similar to that of the typed λ -calculus and use it to provide identity conditions for facts. (...)
    Direct download (5 more)  
     
    Export citation  
     
    My bibliography  
  24. Imagine the Possibilities: Information Without Overload.Mark Jago - unknown
    Information is often modelled as a set of relevant possibilities, treated as logically possible worlds. However, this has the unintuitive consequence that the logical consequences of an agent's information cannot be informative for that agent. There are many scenarios in which such consequences are clearly informative for the agent in question. Attempts to weaken the logic underlying each possible world are misguided. Instead, I provide a genuinely psychological notion of epistemic possibility and show how it can be captured in a (...)
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography   1 citation  
  25. The Conjunction and Disjunction Theses.Mark Jago - 2009 - Mind 118 (470):411-415.
    Rodriguez-Pereyra (2006) argues for the disjunction thesis but against the conjunction thesis. I argue that accepting the disjunction thesis undermines his argument against the conjunction thesis.
    Direct download (10 more)  
     
    Export citation  
     
    My bibliography   3 citations  
  26. Rule-Based and Resource-Bounded: A New Look at Epistemic Logic.Mark Jago - unknown
    Syntactic logics do not suffer from the problems of logical omniscience but are often thought to lack interesting properties relating to epistemic notions. By focusing on the case of rule-based agents, I develop a framework for modelling resource-bounded agents and show that the resulting models have a number of interesting properties.
    Direct download (2 more)  
     
    Export citation  
     
    My bibliography   2 citations  
  27. Belief and Bounded Rationality.Mark Jago - unknown
    Predictive accounts of belief ascription, either following the principle of charity or Dennett's intentional stance, have proved popular recently. However, such accounts require us first to treat agents as perfectly rational agents and then revise this assumption as appropriate. I argue that such downwards revision is no easy task and that several proposed accounts are not satisfactory. I propose a way of characterising agent's belief states which shares Dennett's approach but avoids treating agents as perfectly rational, and develop a formal (...)
    Direct download (4 more)  
     
    Export citation  
     
    My bibliography  
  28.  5
    Modal Realism, Still at Your Convenience.Harold Noonan & Mark Jago - 2017 - Analysis 77 (2):299-303.
    Divers presents a set of de re modal truths which, he claims, are inconvenient for Lewisean modal realism. We argue that there is no inconvenience for Lewis.
    No categories
    Direct download (5 more)  
     
    Export citation  
     
    My bibliography  
  29. Closure on Knowability.Mark Jago - 2010 - Analysis 70 (4):648-659.
    Direct download (10 more)  
     
    Export citation  
     
    My bibliography  
  30.  26
    From Nature to Grounding.Mark Jago - 2011 - In .
    Grounding is a powerful metaphysical concept; yet there is widespread scepticism about the intelligibility of the notion. In this paper, I propose an account of an entity’s nature or essence, which I then use to provide grounding conditions for that entity. I claim that an understanding of an entity’s nature, together with an account of how logically complex entities are grounded, provides all we need to understand how that entity is grounded. This approach not only allows us to say what (...)
    No categories
    Direct download (2 more)  
     
    Export citation  
     
    My bibliography  
  31. Review: Jonathan A. Waskan: Models and Cognition. [REVIEW]Mark Jago - 2009 - Mind 118 (469):220-225.
  32. The Accidental Properties of Numbers and Properties.Harold Noonan & Mark Jago - 2012 - Thought: A Journal of Philosophy 1 (2):134-140.
    According to genuine modal realism, some things (including numbers and properties) lack distinct counterparts in different worlds. So how can they possess any of their properties contingently? Egan (2004) argues that to explain such accidental property possession, the genuine modal realist must depart from Lewis and identify properties with functions, rather than with sets of possibilia. We disagree. The genuine modal realist already has the resources to handle Egan's proposed counterexamples. As we show, she does not need to amend her (...)
    Direct download (5 more)  
     
    Export citation  
     
    My bibliography  
  33.  46
    Properties, by Douglas Edwards.Mark Jago - 2015 - Australasian Journal of Philosophy 93 (3):626-626.
    No categories
    Direct download (4 more)  
     
    Export citation  
     
    My bibliography  
  34.  85
    Preference-Based Belief Revision for Rule-Based Agents.Natasha Alechina, Mark Jago & Brian Logan - 2008 - Synthese 165 (2):159-177.
    Agents which perform inferences on the basis of unreliable information need an ability to revise their beliefs if they discover an inconsistency. Such a belief revision algorithm ideally should be rational, should respect any preference ordering over the agent’s beliefs (removing less preferred beliefs where possible) and should be fast. However, while standard approaches to rational belief revision for classical reasoners allow preferences to be taken into account, they typically have quite high complexity. In this paper, we consider belief revision (...)
    Direct download (7 more)  
     
    Export citation  
     
    My bibliography  
  35. Modelling Communicating Agents in Timed Reasoning Logics.Brian Logan, Mark Jago & Natasha Alechina - 2006 - In U. Endriss & M. Baldoni (eds.), Declarative Agent Languages and Technologies 4. Springer.
    Practical reasoners are resource-bounded—in particular they require time to derive consequences of their knowledge. Building on the Timed Reasoning Logics (TRL) framework introduced in [1], we show how to represent the time required by an agent to reach a given conclusion. TRL allows us to model the kinds of rule application and conflict resolution strategies commonly found in rule-based agents, and we show how the choice of strategy can influence the information an agent can take into account when making decisions (...)
     
    Export citation  
     
    My bibliography   1 citation  
  36. 2. Imagine The Possibilities.Mark Jago - 2006 - Logique Et Analyse 49.
     
    Export citation  
     
    My bibliography   1 citation  
  37.  38
    Pictures and Nonsense.Mark Jago - 2006 - Philosophy Now 58:7-9.
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography  
  38. Indexicals, Fictions, and Ficta.Eros Corazza & Mark Jago - 2003 - Dialectica 52 (2):121-136.
    We defend the view that an indexical uttered by an actor works on the model of deferred reference. If it defers to a character which does not exist, it is an empty term, just as ‘Hamlet’ and ‘Ophelia’ are. The utterance in which it appears does not express a proposition and thus lacks a truth value. We advocate an ontologically parsimonious, anti-realist, position. We show how the notion of truth in our use and understanding of indexicals (and fictional names) as (...)
     
    Export citation  
     
    My bibliography  
  39.  52
    Resource-Bounded Belief Revision and Contraction.Mark Jago - 2006 - In P. Torroni, U. Endriss, M. Baldoni & A. Omicini (eds.), Declarative Agent Languages and Technologies III. Springer. pp. 141--154.
    Agents need to be able to change their beliefs; in particular, they should be able to contract or remove a certain belief in order to restore consistency to their set of beliefs, and revise their beliefs by incorporating a new belief which may be inconsistent with their previous beliefs. An influential theory of belief change proposed by Alchourron, G¨ardenfors and Makinson (AGM) [1] describes postulates which a rational belief revision and contraction operations should satisfy. The AGM postulates have been perceived (...)
    Direct download (2 more)  
     
    Export citation  
     
    My bibliography  
  40.  47
    Joe Salerno (Ed): New Essays on the Knowability Paradox. [REVIEW]Mark Jago - 2010 - Journal of Logic, Language and Information 19 (3):383-387.
    Direct download (5 more)  
     
    Export citation  
     
    My bibliography  
  41.  11
    Narrow Content and Rationality.Mark Jago - unknown
    Direct download  
     
    Export citation  
     
    My bibliography  
  42.  38
    Verifying Space and Time Requirements for Resource-Bounded Agents.Natasha Alechina, Piergiorgio Bertoli, Chiara Ghidini, Mark Jago, Brian Logan & Luciano Serafini - 2007 - In A. Lomuscio & S. Edelkamp (eds.), Model Checking and Artificial Intelligence. Springer.
    The effective reasoning capability of an agent can be defined as its capability to infer, within a given space and time bound, facts that are logical consequences of its knowledge base. In this paper we show how to determine the effective reasoning capability of an agent with limited memory by encoding the agent as a transition system and automatically verifying whether a state where the agent believes a certain conclusion is reachable from the start state. We present experimental results using (...)
    Direct download  
    Translate
     
     
    Export citation  
     
    My bibliography  
  43.  30
    Book Reviews. [REVIEW]Mark Jago - 2007 - Studia Logica 87 (2-3):359-362.
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography  
  44. .Mark Jago - 2011
    No categories
     
    Export citation  
     
    My bibliography  
  45. Reality Making.Mark Jago (ed.) - 2016 - Oxford University Press UK.
    What makes up reality, and how? What kinds of entity are fundamental to reality, and how do dependent entities depend on the fundamental ones? How does one entity metaphysically ground another? These questions are central to contemporary metaphysics. The papers in this collection, written by a new generation of metaphysicians, address these and related questions. They investigate the metaphysical concepts of grounding and fundamentality, and the relationship between the fundamental and all the other parts of reality. Together, these papers represent (...)
     
    Export citation  
     
    My bibliography  
  46. The Impossible: An Essay on Hyperintensionality.Mark Jago - 2014 - Oxford University Press.
    Mark Jago presents an original philosophical account of meaningful thought: in particular, how it is meaningful to think about things that are impossible. We think about impossible things all the time. We can think about alchemists trying to turn base metal to gold, and about unfortunate mathematicians trying to square the circle. We may ponder whether God exists; and philosophers frequently debate whether properties, numbers, sets, moral and aesthetic qualities, and qualia exist. In many philosophical or mathematical debates, when one (...)
    Direct download (2 more)  
     
    Export citation  
     
    My bibliography