Gilbert Edward Plumer

[Winner of the 2017 AILACT Essay Prize Prize.] I argue against the skeptical epistemological view exemplified by the Groarkes that “all theories of informal argument must face the regress problem.” It is true that in our theoretical representations of reasoning, infinite regresses of self-justification regularly and inadvertently arise with respect to each of the RSA criteria for argument cogency (the premises are to be relevant, sufficient, and acceptable). But they arise needlessly, by confusing an RSA criterion with argument content, usually premise material.

Lately, many have pointed out or proposed ways that arguments may be narrative and narratives may be argumentative. This chapter discusses the six basic possibilities: (1) argument in nonfictional or (2) fictional narrative; (3) nonfictional or (4) fictional narrative in argument; (5) argument by nonfictional or (6) fictional narrative. Possibilities 1-4 indicate a proper subset relation between the argument and narrative, whereas 5 and 6 indicate complete overlap. These possibilities cover such kinds of discourse as anecdotes, thought experiments, fables, and novels. Not all of the possibilities are of equal interest. Possibility 6 is the most intriguing if not suspicious—how can fiction argue for the truth of something?—and so, is accorded the most space.

[Winner of the American Philosophical Association’s 2024 Journal of Value Inquiry Prize.] My thesis is that certain non-verbal paintings such as Picasso’s GUERNICA make (simple) arguments. If this is correct and the arguments are reasonably good, it would indicate one way that non-literary art can be cognitively valuable, since argument can provide the justification needed for knowledge or understanding. The focus is on painting, but my findings seem applicable to comparable visual art forms (a sculpture is also considered). My approach largely consists of identifying pertinent features of viable literary cognitivism and then showing how they or close analogues can be applied to non-verbal painting. The two main features are the requirements, first, that the relevant knowledge is provided significantly in virtue of the distinctive essential feature of literary fictions, i.e., their fictionality, and second, that the knowledge stems primarily from the content of the work, not from what the auditor brings to the work. Some ways that literary fiction has been taken to be argumentative are explained, and striking similarities are found between argumentative literary fiction and argumentative painting. Potential objections are addressed, and I examine a proposed way to express, in a schematized format, both the power of an argumentative painting and its relatively simple associated propositional content.

I show that in our theoretical representations of argument, vicious infinite regresses of self-reference may arise with respect to each of the three usual, informal criteria of argument cogency: the premises are to be relevant, sufficient, and acceptable. They arise needlessly, by confusing a cogency criterion with argument content. The three types of regress all are structurally similar to Lewis Carroll’s famous regress, which involves quantitative extravagance with no explanatory power. Most attention is devoted to the sufficiency criterion, including its relation to the view au courant that inferring necessarily involves the thinker taking her premises to support her conclusion. I contend that this view is mistaken and likewise that arguments make no such assumption or inference claim as that the premises support the conclusion. The core of the positive alternative model I propose is that there is commitment to, but not claiming, the proposition that the premises support the conclusion.

Suppositional reasoning can seem spooky. Suppositional reasoners allegedly (e.g.) “extract knowledge from the sheer workings of their own minds” (Rosa), even where the knowledge is synthetic a posteriori. Can literary fiction pull such a rabbit out of its hat? Where P is a work’s fictional ‘premise’, some hold that some works reason declaratively (supposing P, Q), imperatively (supposing P, do Q), or interrogatively (supposing P, Q?), and that this can be a source of knowledge if the reasoning is good. True, I will argue, although only within the context of judicious critical interpretation. Further evident constraints include that the form of the suppositional reasoning needs to be declarative or imperative, and that the fictional ‘premise’ of the work needs to be a metaphysical counterfactual possibility, not merely a temporal counterfactual and not merely an epistemic possibility or probabilistic supposition.

I question whether the case for “literary cognitivism” has generally been successfully made. As it is usually construed, the thesis is easy to satisfy illegitimately because dependence on fictionality is not built in as a requirement. The thesis of literary cognitivism should say: “literary fiction can be a source of knowledge in a way that depends crucially on its being fictional” (Green’s phrasing). After questioning whether nonpropositional cognitivist views (e.g., Nussbaum’s) meet this neglected standard, I argue that if fictional narratives can impart propositional knowledge in virtue of their fictionality, it would be largely via a suppositional framework. Yet in many cases, such as Huxley’s Brave New World, the key literary supposition could simply be an epistemic possibility (‘suppose X, which for all we know, occurs sometime’), not counterfactual supposition, that is, distinctively fictional supposition. The best general case for literary cognitivism may be the limited one that literary fiction can alert us to nonactual metaphysical possibilities that may be important for understanding actuality. Yet even here, seemingly possible fictions are often impossible.

Some believe that all arguments make an implicit “inference claim” that the conclusion is inferable from the premises (e.g., Bermejo-Luque, Grennan, the Groarkes, Hitchcock, Scriven). I try to show that this is confused. An act of arguing arises because an inference can be attributed to us, not a meta-level “inference claim” that would make the argument self-referential and regressive. I develop six (other) possible explanations of the popularity of the doctrine that similarly identify confusions.

Can fictional narration yield knowledge in a way that depends crucially on its being fictional? This is the hard question of literary cognitivism. It is unexceptional that knowledge can be gained from fictional literature in ways that are not dependent on its fictionality (e.g., the science in science fiction). Sometimes fictional narratives are taken to exhibit the structure of suppositional argument, sometimes analogical argument. Of course, neither structure is unique to narratives. The thesis of literary cognitivism would be supported if some novels exhibit a cogent and special argument structure restricted to fictional narratives. I contend that this is the case for a kind of transcendental argument. The reason is the inclusion and pattern of occurrence of the predicate ‘believable’ in the schema. Believability with respect to fictional stories is quite a different thing than it is with respect to nonfictional stories or anything else.

Rodden writes, “How do stories persuade us? How do they ‘move’—and move us? The short answer: by analogies.” Rodden’s claim is a natural first view, also held by others. This chapter considers the extent to which this view is true and helpful in understanding how fictional narratives, taken as wholes, may be argumentative, comparing it to the two principal (though not necessarily exclusive) alternatives that have been proposed: understanding fictional narratives as exhibiting the structure of suppositional argument, or the structure of a kind of transcendental argument. Three key aspects of understanding a fictional narrative as an argument from analogy are identified. First, the argument will be relativistic or depend in an essential way upon the circumstances or intentions of the auditor or author. Second, in view of the first aspect, the argument will be loose and subjective, and accordingly less likely to yield knowledge. Third, the argument will not exhibit a distinctive structure applicable only to fictional narratives. I find that the third, and sometimes the first and second, of these same three aspects apply to understanding fictional narratives as suppositional arguments. I present considerations that point to a way of establishing that some extended fictions exhibit the structure of a kind of transcendental argument that is neither relativistic nor subjective, is knowledge-generating, and is uniquely applicable to fictional narratives. This supports literary cognitivism—the thesis that “literary fiction can be a source of knowledge in a way that depends crucially on its being fictional.”

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’.

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.

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).

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.

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?

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.

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.

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?

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.