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Gilbert Edward Plumer

University of Illinois, Urbana-Champaign
  •  Home
  •  Publications
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 More details
University of Illinois, Urbana-Champaign
PhD, 1983
APA Eastern Division
Email (login required)
Areas of Specialization
Aesthetics
Reasoning
Philosophy of Literature
Informal Logic
Areas of Interest
Value Theory
Logic and Philosophy of Logic
Metaphysics
  • All publications (46)
  •  1688
    What Constitutes a Formal Analogy?
    with Kenneth Olson
    In Hans V. Hansen, Christopher W. Tindale, J. Anthony Blair, Ralph H. Johnson & Robert C. Pinto (eds.), Argumentation and its Applications, CD-ROM, Ontario Society For the Study of Argumentation. pp. 1-8. 2002.
    There is ample justification for having analogical material in standardized tests for graduate school admission, perhaps especially for law school. We think that formal-analogy questions should compare different scenarios whose structure is the same in terms of the number of objects and the formal properties of their relations. The paper deals with this narrower question of how legitimately to have formal analogy test items, and the broader question of what constitutes a formal analogy in genera…Read more
    There is ample justification for having analogical material in standardized tests for graduate school admission, perhaps especially for law school. We think that formal-analogy questions should compare different scenarios whose structure is the same in terms of the number of objects and the formal properties of their relations. The paper deals with this narrower question of how legitimately to have formal analogy test items, and the broader question of what constitutes a formal analogy in general.
    The Nature of SetsObjects and Properties, MiscLogic and Philosophy of Logic, MiscDeductive Reasoning
  •  1107
    Reasoning from Conflicting Sources
    with Kenneth Olson
    In Dissensus and the Search for Common Ground, . pp. 1-9. 2007.
    One might ask of two or more texts—what can be inferred from them, taken together? If the texts happen to contradict each other in some respect, then the unadorned answer of standard logic is EVERYTHING. But it seems to be a given that we often successfully reason with inconsistent information from multiple sources. The purpose of this paper is to attempt to develop an adequate approach to accounting for this given.
    Paraconsistent LogicNonmonotonic LogicInformal LogicDialetheism
  •  990
    Kaplan Rigidity, Time, and Modality
    Logique Et Analyse 31 (123-124): 329-335. 1988.
    Joseph Almog says concerning “a certain locus where Quine doesn’t exist…qua evaluation locus, we take to it [singular] propositions involving Quine [as a constituent] which we have generated in our generation locus.” This seems to be either murder, or worse, self-contradiction. It presumes that certain designators designate their designata even at loci where the designata do not exist, i.e., the designators have “Kaplan rigidity.” Against this view, this paper argues that negative existentials s…Read more
    Joseph Almog says concerning “a certain locus where Quine doesn’t exist…qua evaluation locus, we take to it [singular] propositions involving Quine [as a constituent] which we have generated in our generation locus.” This seems to be either murder, or worse, self-contradiction. It presumes that certain designators designate their designata even at loci where the designata do not exist, i.e., the designators have “Kaplan rigidity.” Against this view, this paper argues that negative existentials such as “Quine does not exist” are true only at ordered couples of loci (times or possible worlds) < l, l’ > such that the constituents of the truthmaker are the designatum itself from l and whatever corresponds to “does not exist” from l’.
    Direct Reference Theories of IndexicalsRigid DesignationMillian Theories of NamesSingular Propositio…Read more
    Direct Reference Theories of IndexicalsRigid DesignationMillian Theories of NamesSingular PropositionsFacts and States of AffairsExistence
  •  882
    Commentary on: Jesse Bohl's "What are we to do about traditional logic?"
    In Argumentation at the Century's Turn [CD-ROM], Ontario Society For the Study of Argumentation. pp. 1-4. 2000.
    N/A.
    Predicate LogicNonexistent ObjectsAristotelian LogicAristotle: Syllogistic
  •  3659
    Novels as Arguments
    In Frans H. van Eemeren, Bart Garssen, David Godden & Gordon Mitchell (eds.), Proceedings of the Seventh International Conference of the International Society for the Study of Argumentation, Rozenberg / Sic Sat. pp. 1547-1558. 2011.
    The common view is that no novel IS an argument, though it might be reconstructed as one. This is curious, for we almost always feel the need to reconstruct arguments even when they are uncontroversially given as arguments, as in a philosophical text. We make the points as explicit, orderly, and (often) brief as possible, which is what we do in reconstructing a novel’s argument. The reverse is also true. Given a text that is uncontroversially an explicit, orderly, and brief argument, in order to…Read more
    The common view is that no novel IS an argument, though it might be reconstructed as one. This is curious, for we almost always feel the need to reconstruct arguments even when they are uncontroversially given as arguments, as in a philosophical text. We make the points as explicit, orderly, and (often) brief as possible, which is what we do in reconstructing a novel’s argument. The reverse is also true. Given a text that is uncontroversially an explicit, orderly, and brief argument, in order to enhance plausibility, our first instinct is to flesh it out with illustrations and relationships to everyday life. If this process is fictive (e.g., with “thought experiments”) and orderly, it is story-telling. This paper investigates whether there is a principled way of determining a novel’s argument, which should contribute as much to understanding arguments as to understanding novels.
    NarrativeAesthetic NormativityInformal LogicLiterature and EthicsArgumentTranscendental ArgumentsEmp…Read more
    NarrativeAesthetic NormativityInformal LogicLiterature and EthicsArgumentTranscendental ArgumentsEmpathy and Sympathy
  •  1023
    The Paradoxical Associated Conditional of Enthymemes
    In Christopher W. Tindale, Hans V. Hansen & Elmar Sveda (eds.), Argumentation at the Century's Turn [CD-ROM], Ontario Society For the Study of Argumentation. pp. 1-8. 2000.
    Expressing a widely-held view, David Hitchcock claims that "an enthymematic argument ... assumes at least the truth of the argument's associated conditional ... whose antecedent is the conjunction of the argument's explicit premises and whose consequent is the argument's conclusion." But even definitionally, this view is problematic, since an argument's being "enthymematic" or incomplete with respect to its explicit premises means that the conclusion is not implied by these premises alone. The p…Read more
    Expressing a widely-held view, David Hitchcock claims that "an enthymematic argument ... assumes at least the truth of the argument's associated conditional ... whose antecedent is the conjunction of the argument's explicit premises and whose consequent is the argument's conclusion." But even definitionally, this view is problematic, since an argument's being "enthymematic" or incomplete with respect to its explicit premises means that the conclusion is not implied by these premises alone. The paper attempts to specify the ways in which the view is incorrect, as well as seemingly correct (e.g., the case of a Modus Ponens wherein the major premise is implicit).
    Logical Consequence and EntailmentInformal LogicThe Nature of ReasoningDeductive ReasoningInductive …Read more
    Logical Consequence and EntailmentInformal LogicThe Nature of ReasoningDeductive ReasoningInductive Reasoning
  •  2188
    Presumptions, Assumptions, and Presuppositions of Ordinary Arguments
    Argumentation 31 (3): 469-484. 2017.
    Although in some contexts the notions of an ordinary argument’s presumption, assumption, and presupposition appear to merge into the one concept of an implicit premise, there are important differences between these three notions. It is argued that assumption and presupposition, but not presumption, are basic logical notions. A presupposition of an argument is best understood as pertaining to a propositional element (a premise or the conclusion) e of the argument, such that the presupposition is …Read more
    Although in some contexts the notions of an ordinary argument’s presumption, assumption, and presupposition appear to merge into the one concept of an implicit premise, there are important differences between these three notions. It is argued that assumption and presupposition, but not presumption, are basic logical notions. A presupposition of an argument is best understood as pertaining to a propositional element (a premise or the conclusion) e of the argument, such that the presupposition is a necessary condition for the truth of e or for a term in e to have a referent. In contrast, an assumption of an argument pertains to the argument as a whole in that it is integral to the reasoning or inferential structure of the argument. A logical assumption of an argument is essentially a proposition that must be true in order for the argument aside from that proposition to be fully cogent. Nothing that is both comparable and distinguishing can be said about presumptions of arguments. Rather, presumptions of arguments are distinctively conventional; they are introduced through conventional rules (e.g., those that concern how to treat promises). So not all assumptions and not all presuppositions of arguments are presumptions of those arguments, although all presumptions of arguments are either assumptions or presuppositions of those arguments. This account avoids making the (monological) notion of presumption vacuous and dissolving the distinction between assumption and presumption, which is a vulnerability of alternative views such as Hansen’s and Bermejo-Luque’s, as is shown.
    The Nature of ReasoningArgumentPresuppositionSemantics-Pragmatics DistinctionInformal LogicLinguisti…Read more
    The Nature of ReasoningArgumentPresuppositionSemantics-Pragmatics DistinctionInformal LogicLinguistic Convention
  •  149
    Expressions of passage
    Philosophical Quarterly 37 (149): 341-354. 1987.
    It seems a contradiction to hold of something both that it took a while and that no time elapsed or passed between its start and finish; there is a connection between the ideas of temporal extendedness and passage. The article develops this connection into a defense of the passage view of time and shows how without this sort of defense, conclusions of arguments putatively in support of the passage view may be reinterpreted as not in fact being expressions of that view.
    The Passage of Time, MiscB-Theories of TimeA-Theories of TimeIndexicals and DemonstrativesEventsTemp…Read more
    The Passage of Time, MiscB-Theories of TimeA-Theories of TimeIndexicals and DemonstrativesEventsTemporal ExpressionsPersistence
  •  1583
    A Defense of Taking Some Novels As Arguments
    In B. J. Garssen, D. Godden, G. Mitchell & A. F. Snoeck Henkemans (eds.), Proceedings of the 8th International Conference of the International Society for the Study of Argumentation [CD-ROM], Sic Sat. pp. 1169-1177. 2015.
    This paper’s main thesis is that in virtue of being believable, a believable novel makes an indirect transcendental argument telling us something about the real world of human psychology, action, and society. Three related objections are addressed. First, the Stroud-type objection would be that from believability, the only conclusion that could be licensed concerns how we must think or conceive of the real world. Second, Currie holds that such notions are probably false: the empirical evidence “…Read more
    This paper’s main thesis is that in virtue of being believable, a believable novel makes an indirect transcendental argument telling us something about the real world of human psychology, action, and society. Three related objections are addressed. First, the Stroud-type objection would be that from believability, the only conclusion that could be licensed concerns how we must think or conceive of the real world. Second, Currie holds that such notions are probably false: the empirical evidence “is all against this idea…that readers’ emotional responses track the real causal relations between things.” Third, responding with a full range of emotions to a novel surely requires that it be believable. Yet since we know the novel is fiction, we do not believe it. So in what does its believability consist?
    NarrativeLiterature and EmotionLiterature and KnowledgeHuman NatureParadox of FictionThe Nature of F…Read more
    NarrativeLiterature and EmotionLiterature and KnowledgeHuman NatureParadox of FictionThe Nature of Folk PsychologyAesthetic RealismTranscendental ArgumentsAesthetic CognitionSelf-Knowledge
  •  1416
    A Review of the LSAT Using Literature on Legal Reasoning
    Law School Admission Council Computerized Testing Report 97 (8): 1-19. 2000.
    Research using current literature on legal reasoning was conducted with the goals of (a) determining what skills are most important in good legal reasoning according to such literature, (b) determining the extent to which existing Law School Admission Test item types and subtypes are designed to assess those skills, and (c) suggesting test specifications or new or refined item types and formats that could be developed in the future to assess any important skills that appear [by (a) and (b)] to b…Read more
    Research using current literature on legal reasoning was conducted with the goals of (a) determining what skills are most important in good legal reasoning according to such literature, (b) determining the extent to which existing Law School Admission Test item types and subtypes are designed to assess those skills, and (c) suggesting test specifications or new or refined item types and formats that could be developed in the future to assess any important skills that appear [by (a) and (b)] to be measured in a limited or minimal way by the current LSAT. So far as can be determined, such systematic research using legal reasoning literature has never been previously conducted. This report presents the findings of this research.
    Informal LogicLegal Reasoning and Adjudication, MiscLawImplementing ComputationsCritical Thinking
  •  1649
    Truth and Collective Truth
    Dialectica 50 (1): 3-24. 1996.
    The paper argues for the applicability of the notion of collective truth as opposed to distributive truth, that is, truth at times or possibilia taken in groups rather than individually. The underlying reasoning is that there are transtemporal and transworld relationships, e.g., those involving the relations of <being a descendant of> and <thinking about>. Relationships are (one type of) truth-makers. Hence, there are transtemporal and transworld truth-makers. Therefore, there is transtemporal a…Read more
    The paper argues for the applicability of the notion of collective truth as opposed to distributive truth, that is, truth at times or possibilia taken in groups rather than individually. The underlying reasoning is that there are transtemporal and transworld relationships, e.g., those involving the relations of <being a descendant of> and <thinking about>. Relationships are (one type of) truth-makers. Hence, there are transtemporal and transworld truth-makers. Therefore, there is transtemporal and transworld truth, i.e., collective truth. A semantics is developed (formalized in the appendix) which embodies the notion of collective truth, and which thereby, it is argued, has various advantages over standard intensional semantics. For example, it avoids a commitment to certain impossible entities.
    Semantics for Modal LogicFacts and States of AffairsTruthmakersTemporal LogicSingular Propositions
  •  1426
    Mustn't whatever is referred to exist?
    Southern Journal of Philosophy 27 (4): 511-528. 1989.
    Some hold that proper names and indexicals are “Kaplan rigid”: they designate their designata even in worlds where the designata don’t exist. An argument they give for this is based on the analogy between time and modality. It is shown how this argument gains forcefulness at the expense of carefulness. Then the argument is criticized as forming a part of an inconsistent philosophical framework, the one with which David Kaplan and others operate. An alternative account of a certain class of negat…Read more
    Some hold that proper names and indexicals are “Kaplan rigid”: they designate their designata even in worlds where the designata don’t exist. An argument they give for this is based on the analogy between time and modality. It is shown how this argument gains forcefulness at the expense of carefulness. Then the argument is criticized as forming a part of an inconsistent philosophical framework, the one with which David Kaplan and others operate. An alternative account of a certain class of negative existentials is developed, one which eliminates both the inconsistency and the need for Kaplan rigidity. After all, mustn’t whatever is referred to exist?
    Direct Reference Theories of IndexicalsExistenceRigid DesignationMillian Theories of NamesSingular P…Read more
    Direct Reference Theories of IndexicalsExistenceRigid DesignationMillian Theories of NamesSingular PropositionsFacts and States of Affairs
  •  947
    Commentary on: Chiara Pollaroli's "T(r)opical patterns in advertising"
    In Dima Mohammed & Marcin Lewinski (eds.), Virtues of argumentation: Proceedings of the 10th International Conference of the Ontario Society for the Study of Argumentation (OSSA), May 22–25, 2013, Ossa. pp. 1-5. 2014.
    N/A.
    Media EthicsInformal LogicDeceptionThe Nature of ReasoningNarrativePhilosophy of Visual Art
  •  829
    Commentary on: John E. Fields' "Credibility and commitment in the making of truly astonishing first-person reports"
    In Frank Zenker (ed.), Argumentation: Cognition & Community. Proceedings of the 9th International Conference of the Ontario Society for the Study of Argumentation [CD-ROM], Ontario Society For the Study of Argumentation. pp. 1-4. 2011.
    N/A.
    First-Person Approaches in the Science of ConsciousnessArguments Against Theism, MiscReligious Exper…Read more
    First-Person Approaches in the Science of ConsciousnessArguments Against Theism, MiscReligious ExperienceEpistemology of Testimony
  •  124
    Why time is extensive
    Mind 93 (370): 265-270. 1984.
    I attempt to show, via considering Schlesinger’s device of putting the word ‘now’ in capitals, that the transient view of time can explicate temporal extensivity without presupposing it, and the static view can’t. The argument hinges on the point that duration is generated by continuance of the present—such that ‘the present’ here is used in a nontechnical, nonindexical, and nonreflexive sense, which Schlesinger and others unknowingly give to the word ‘now’ (by “NOW” or “Now” or “’now’”).
    B-Theories of TimeA-Theories of TimeThe Passage of Time, MiscPersistence, MiscIndexicals, MiscBertra…Read more
    B-Theories of TimeA-Theories of TimeThe Passage of Time, MiscPersistence, MiscIndexicals, MiscBertrand Russell
  •  1517
    Phenomenological Argumentative Structure
    Argumentation 15 (2): 173-189. 2001.
    The nontechnical ability to identify or match argumentative structure seems to be an important reasoning skill. Instruments that have questions designed to measure this skill include major standardized tests for graduate school admission, for example, the United States-Canadian Law School Admission Test (LSAT), the Graduate Record Examinations (GRE), and the Graduate Management Admission Test (GMAT). Writers and reviewers of such tests need an appropriate foundation for developing such questions…Read more
    The nontechnical ability to identify or match argumentative structure seems to be an important reasoning skill. Instruments that have questions designed to measure this skill include major standardized tests for graduate school admission, for example, the United States-Canadian Law School Admission Test (LSAT), the Graduate Record Examinations (GRE), and the Graduate Management Admission Test (GMAT). Writers and reviewers of such tests need an appropriate foundation for developing such questions--they need a proper representation of phenomenological argumentative structure--for legitimacy, and because these tests affect people's lives. This paper attempts to construct an adequate and appropriate representation of such structure, that is, the logical structure that an argument is perceived to have by mature reasoners, albeit ones who are untrained in logic.
    Logical Consequence and EntailmentInformal LogicLogical FormLogical ConstantsFallaciesInductive Reas…Read more
    Logical Consequence and EntailmentInformal LogicLogical FormLogical ConstantsFallaciesInductive ReasoningDeductive ReasoningArgument
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