The received view of an ad hochypothesis is that it accounts for only the observation(s) it was designed to account for, and so non-ad hocness is generally held to be necessary or important for an introduced hypothesis or modification to a theory. Attempts by Popper and several others to convincingly explicate this view, however, prove to be unsuccessful or of doubtful value, and familiar and firmer criteria for evaluating the hypotheses or modified theories so classified are characteristically available. These points (...) are obscured largely because the received view fails to adequately separate psychology from methodology or to recognise ambiguities in the use of ''ad hoc''. (shrink)

The Report of the Ad Hoc Adivisory Group on the Operation of NHS Research Ethics Committees has resulted in a strange mixture of the timid, the revolutionary, and the bizarre.The Report of the Ad Hoc Advisory Group on the Operation of NHS Research Ethics Committees is a curious document.1 The remit of the review was focused on the workings and effectiveness of NHS research ethics committees and the multicentre committees ). The Group was primarily set up in response to a (...) series of complaints from medical researchers about the new research governance regime in the UK as a result of the Clinical Trials Directive2 and the Governance Arrangements for NHS Research Ethics Committees.3 The opportunity was also taken to consider the role of research ethics committees in a wider context, and take account of recent developments in relation to the ethics review of social care research,4 student projects,5 as well as recent legislation such as the Human Tissue Act,6 and the Mental Capacity Act.7 However, the resulting report is a strange mixture of the timid, the revolutionary, and the bizarre.A good example of the report’s timidity is its reluctance to propose fundamental change to the process of review or seriously limit the type of research that requires REC review. To its credit AHAG does suggest that some research ‘especially surveys and many studies on NHS staff, could normally be conducted safely without a requirement for REC review’ .1 This is, of course, to be welcomed. However, the report ultimately seems dismissive of the general complaint from researchers that the current process is inappropriately uniform. For example, in section 3.2, it is argued that the ‘common perception that the NHS REC system is dominated …. (shrink)

Gothic cathedrals like Chartres were built in a discontinuous process by groups of masons using their own local knowledge, measures, and techniques. They had neither plans nor knowledge of structural mechanics. The success of the masons in building such large complex innovative structures lies in the use of templates, string, constructive geometry, and social organization to assemble a coherent whole from the messy heterogeneous practices of diverse groups of workers. Chartres resulted from the ad hoc accumulation of the work of (...) many men. (shrink)

Philosophers of science have given up on the quest for a silver bullet to put an end to all pseudoscience, as such a neat formal criterion to separate good science from its contenders has proven elusive. In the literature on critical thinking and in some philosophical quarters, however, this search for silver bullets lives on in the taxonomies of fallacies. The attractive idea is to have a handy list of abstract definitions or argumentation schemes, on the basis of which one (...) can identify bad or invalid types of reasoning, abstracting away from the specific content and dialectical context. Such shortcuts for debunking arguments are tempting, but alas, the promise is hardly if ever fulfilled. Different strands of research on the pragmatics of argumentation, probabilistic reasoning and ecological rationality have shown that almost every known type of fallacy is a close neighbor to sound inferences or acceptable moves in a debate. Nonetheless, the kernel idea of a fallacy as an erroneous type of argument is still retained by most authors. We outline a destructive dilemma we refer to as the Fallacy Fork: on the one hand, if fallacies are construed as demonstrably invalid form of reasoning, then they have very limited applicability in real life. On the other hand, if our definitions of fallacies are sophisticated enough to capture real-life complexities, they can no longer be held up as an effective tool for discriminating good and bad forms of reasoning. As we bring our schematic “fallacies” in touch with reality, we seem to lose grip on normative questions. Even approaches that do not rely on argumentation schemes to identify fallacies fail to escape the Fallacy Fork, and run up against their own version of it. (shrink)

In this paper I argue that Tyler Burge's non-reductive view of testiomonial knowledge cannot adeqautrely discriminate between fallacious ad vericumdium appeals to expet testimony and legitimate appeals to authority.

This article aims tt providing some conceptual tools for dealing adequately with relevance in argumentative discourse. For this purpose, argumentative relevance is defined as a functional interactional relation between certain elements in the discourse. In addition to the distinction between interpretive and evaluative relevance that can be traced in the literature, analytic relevance is introduced as an intermediary concept. In order to classify the various problems of relevance arising in interpreting, analyzing and evaluating argumentative discourse, a taxonomy is proposed in (...) which the concept of relevance is differentiated along three co-ordinate dimensions: object, domain and aspect. With the help of this taxonomy, it can be shown that the problems of evaluative relevance with which the standard approach to fallacies cannot satisfactory deal can be more systematically approached within a pragma-dialectical framework. This is demonstrated for the argumentum and hominem, which is erroneously treated as a homogenous type of relevance fallacy in logico-centric analyses, so that cases where this is not justified must be treated as ad hoc exceptions. (shrink)

RESUMEN: El presente artículo tiene por objetivo analizar desde una perspectiva feminista las similitudes y diferencias existentes entre los Tribunales Ad-hoc para Ruanda y la Antigua Yugoslavia relacionados con los crímenes relativos a violencia sexual y violación. Analizando los componentes que afectan la determinación de dichos crímenes como son el consentimiento y el contexto y su tipificación internacional: Genocidio y lesa humanidad. ABSTRACT: The present article aims to analyze from a feminist point of view the similarities and differences between the (...) Ad-hoc Tribunals for Rwanda and the former Yugoslavia related sexual violence and rape crimes. PALABRAS CLAVE: Ruanda, Ex-Yugoslavia, violencia sexual, lesa humanidad, genocidio, violación, consentimiento, contexto. KEYWORDS: Rwanda, Ex- Yugoslavia, sexual violence, crimes against humanity, genocide, rape, contentment, coercion, context. (shrink)

We examine physicists’ charge of ad hocness against the Higgs mechanism in the standard model of elementary particle physics. We argue that even though this charge never rested on a clear-cut and well-entrenched definition of “ad hoc”, it is based on conceptual and methodological assumptions and principles that are well-founded elements of the scientific practice of high-energy particle physics. We further evaluate the implications of the recent discovery of a Higgs-like particle at the CERN’s Large Hadron Collider for the charge (...) of ad hocness against the Higgs mechanism. (shrink)

This paper applies dialectical argumentation structures to the problem of analyzing the ad baculum fallacy. It is shown how it is necessary in order to evaluate a suspected instance of the this fallacy to proceed through three levels of analysis: an inferential level, represented by an argument diagram, a speech act level, where conditions for specific types of speech acts are defined and applied, and a dialectical level where the first two levels are linked together and fitted into (...) formal dialogue structures. The paper adds a new type of dialogue called advising dialogue that needs to be applied at the third level. (shrink)

An ad hominem fallacy is committed when an individual employs an irrelevant personal attack against an opponent instead of addressing that opponent’s argument. Many discussions of such fallacies discuss judgments of relevance about such personal attacks, and consider how we might distinguish those that are relevant from those that are not. This paper will argue that the literature on bias and testimony can helpfully contribute to that analysis. This will highlight ways in which biases, particularly unconscious biases, can make (...) ad hominem fallacies seem effective, even when the irrelevance is recognized. (shrink)

This article aims tt providing some conceptual tools for dealing adequately with relevance in argumentative discourse. For this purpose, argumentative relevance is defined as a functional interactional relation between certain elements in the discourse. In addition to the distinction between interpretive and evaluative relevance that can be traced in the literature, analytic relevance is introduced as an intermediary concept. In order to classify the various problems of relevance arising in interpreting, analyzing and evaluating argumentative discourse, a taxonomy is proposed in (...) which the concept of relevance is differentiated along three co-ordinate dimensions: object, domain and aspect. With the help of this taxonomy, it can be shown that the problems of evaluative relevance with which the standard approach to fallacies cannot satisfactory deal can be more systematically approached within a pragma-dialectical framework. This is demonstrated for the argumentum and hominem, which is erroneously treated as a homogenous type of relevance fallacy in logico-centric analyses, so that cases where this is not justified must be treated as ad hoc exceptions. (shrink)

This article outlines criteria for the evaluation of the argumentum ad hominem (argument against the person, or personal attack in argument) that is traditionally a part of the curriculum in informal logic. The argument is shown to be a kind of criticism which works by shifting the burden of proof in dialogue through citing a pragmatic inconsistency in an arguer's position. Several specific cases of ad hominem argumentation which pose interesting problems in analyzing this type of criticism are studied.

Science is increasingly becoming automated. Tasks yet to be fully automated include the conjecturing, modifying, extending and testing of hypotheses. At present scientists have an array of methods to help them carry out those tasks. These range from the well-articulated, formal and unexceptional rules to the semi-articulated and variously understood rules-of-thumb and intuitive hunches. If we are to hand over at least some of the aforementioned tasks to machines, we need to clarify, refine and make formal, not to mention computable, (...) even the more obscure of the methods scientists successfully employ in their inquiries. The focus of this essay is one such less-than-transparent methodological rule. I am here referring to the rule that ad hoc hypotheses ought to be spurned. This essay begins with a brief examination of some notable conceptions of ad hoc-ness in the philosophical literature. It is pointed out that there is a general problem afflicting most such conceptions, namely the intuitive judgments that are supposed to motivate them are not universally shared. Instead of getting bogged down in what ad hoc-ness exactly means, I shift the focus of the analysis to one undesirable feature often present in alleged cases of ad hoc-ness. I call this feature the ‘monstrousness’ of a hypothesis. A fully articulated formal account of this feature is presented by specifying what it is about the internal constitution of a hypothesis that makes it monstrous. Using this account, a monstrousness measure is then proposed and somewhat sketchily compared with the minimum description length approach. (shrink)

What is wrong with ad hoc hypotheses? Ever since Popper’s falsificationist account of adhocness, there has been a lively philosophical discussion about what constitutes adhocness in scientific explanation, and what, if anything, distinguishes legitimate auxiliary hypotheses from illicit ad hoc ones. This paper draws upon distinct examples from pseudoscience to provide us with a clearer view as to what is troubling about ad hoc hypotheses. In contrast with other philosophical proposals, our approach retains the colloquial, derogative meaning of adhocness, and (...) calls attention to the way in which the context of a theoretical move bears on the charge of adhocness. We also discuss the role of motivations implicit in the concept of adhocness, and the way ad hoc moves draw on theory-internal rationalizations. (shrink)

Hume argues that whenever we seem to be motivated by reason, there are unnoticed calm passions that play this role instead, a move that is often criticised as ad hoc. In response, some commentators propose a conceptual rather than empirical reading of Hume’s conativist thesis, either as a departure from Hume, or as an interpretation or rational reconstruction. I argue that conceptual accounts face a dilemma: either they render the conativist thesis trivial, or they violate Hume’s thesis that ‘a priori, (...) any thing may produce any thing’. I defend an empirical construal of Hume’s conativist thesis. I provide two theoretical frameworks within which Hume’s appeal to the calm passions may be justified: first, by the framework of theoretical virtues, and secondly, by lights of his own “rules by which to judge of causes and effects”. (shrink)

Recent work in relevance-theoretic pragmatics develops the idea that understanding verbal utterances involves processes of ad hoc concept construction. The resulting concepts may be narrower or looser than the lexical concepts which provide the input to the process. Two of the many issues that arise are considered in this paper: (a) the applicability of the idea to the understanding of metaphor, and (b) the extent to which lexical forms are appropriately thought of as encoding concepts.

Wireless ad hoc communication on the nanoscale will require thinking outside of the traditional radio spectrum. New applications will utilize new forms of wireless communication channels. For example, nanoscale communication will enable precise mechanisms for directly interacting with cells in vivo. Information may be sent to and from specific cells within the body, allowing detection and healing of diseases on the cellular scale. From a medical standpoint, the use of current wireless techniques to communicate with implants is unacceptable for many (...) reasons, including bulky size, inability to use magnetic resonance imaging after implantation, potential radiation damage, surgical invasiveness, need to recharge/replace power, post-operative pain and long recovery times, and reduced quality of life for the patient. Better, more humane in vivo implant communication is needed. Development of both biological and engineered nanomachines is progressing; such machines will need to communicate [1]. Unfortunately, networking vast collections of nanoscale sensors and robots using current techniques, including wireless techniques, is not possible without communication mechanisms that exceed nanoscale volumes. (shrink)

All of us, including scientists, make judgments about what is true or false, probable or improbable. And in the process, we frequently appeal to concepts such as evidential support or explanation. Bayesian philosophers of science have given illuminating formal accounts of these concepts. This paper aims to follow in their footsteps, providing a novel formal account of various additional concepts: the likelihood-prior trade-off, successful accommodation of evidence, ad hocness, and, finally, consilience—sometimes also called “unification”. Using these accounts, I also provide (...) a new Bayesian analysis of how someone such as Charles Darwin hypothetically could have reasoned in favor of evolution over special creationism. Lastly, I explore how these accounts relate to other topics and accounts in philosophy, and I chart out some areas for further research. (shrink)

Hume argues that whenever we seem to be motivated by reason, there are unnoticed calm passions that play this role instead, a move is that is often criticised as ad hoc (e.g. Stroud 1977 and Cohon 2008). In response, some commentators propose a conceptual rather than empirical reading of Hume’s conativist thesis, either as a departure from Hume (Stroud 1977), or as an interpretation or rational reconstruction (Bricke 1996). -/- I argue that conceptual accounts face a dilemma: either they render (...) the conativist thesis trivial, or they violate Hume's thesis that 'a priori, any thing may produce any thing'. I defend an empirical construal of Hume’s conativist thesis. I provide two theoretical frameworks within which Hume’s appeal to the calm passions may be justified: first, by the framework of theoretical virtues, and secondly, by lights of his own ‘rules by which to judge of causes and effects’ (THN 1.3.15). (shrink)

The ad baculum is not a fallacy in an argument, but is offered instead of an argument to put an end to further argument. This claim is the basis for criticizing Michael Wreen's "neo-traditionalism," which yields misreadings of supposed cases of the ad baculum because of its rejection of any consideration of what the person using the ad baculum, or someone who refers to that use as an "argument," is doing. The paper concludes with reflections on the values that (...) should inform talk of a fallacy in an argument such as the one that Wreen is giving. (shrink)

In this article I review attempts to define the term “ad hoc hypothesis,” focusing on the efforts of, among others, Karl Popper, Jarrett Leplin, and Gerald Holton. I conclude that the term is unhelpful; what is “ad hoc” seems to be a judgment made by particular scientists not on the basis of any well-established definition but rather on their individual aesthetic senses. Further, a hypothesis considered ad hoc can apparently be retroactively declared non–ad hoc on the basis of subsequent data, (...) rendering the term meaningless. (shrink)

When a theory is confronted with a problem such as a paradox, an empirical anomaly, or a vicious regress, one may change part of the theory to solve that problem. Sometimes the proposed solution is considered ad hoc. This paper gives a new definition of ‘ad hoc solution’ as used in both philosophy and science. I argue that a solution is ad hoc if it fails to live up to the explanatory requirements of a theory because the solution is not (...) backed by an explanation or because it does not diagnose the problem. Ad hoc solutions are thus magical: they solve a problem without providing insight. This definition helps to explain both why ad hoc solutions are bad and why there may be disagreement about cases. (shrink)

Karl Popper defines an ad hoc hypothesis as one that is introduced to immunize a theory from some (or all) refutation but which cannot be tested independently. He has also attempted to explicate ad hocness in terms of certain other allegedly undesirable properties of hypotheses or of the explanations they would provide, but his account is confused and mistaken. The first such property is circularity, which is undesirable; the second such property is reduction in empirical content, which need not be. (...) In the former case, I argue that non-circularity is in any event preferable to non-ad hocness as a necessary condition for a satisfactory explanation or an explanans, as the case may be, and I try to sort out various persistent errors surrounding this comparison. In the latter case, I suggest that Popper is barking up the wrong tree, that important scientific progress sometimes does consist in just such reductions in empirical content as he proscribes. This provides a further reason for not taking ad hoc hypotheses as Popper conceives them to pose the danger for science he believes they do. (shrink)

Recently, Casasanto and Lupyan (2015) have proposed an appealing and daring thesis: there are no context-independent concepts—that is, all concepts are ad hoc concepts. They argue that the seeming stability of concepts is merely due to commonalities across their different instantiations but that, in fact, there is nothing invariant in them. In their view, concepts only exist when they are instantiated for categorizing, communicating, drawing inferences, etc., and those instantiations are produced on the fly from a set of contextual cues. (...) However, the main weakness of Casasanto and Lupyan’s framework is that it lacks a proposal for articulating it within a theory on the structure of concepts. My aim is to show that the ad hoc cognition framework can be characterized by means of a prototype theory of concepts developed in terms of a conceptual similarity space. (shrink)

To date there seems to be no disciplined way of distinguishing between ad hoc hypotheses and legitimate auxiliary hypotheses. This is embarrassing not just for Popperian falsificationist scientific methodology, for the need for such a distinction seems an important part of scientific practice. Do scientists bother about ad hoc hypotheses at all? Did any towering figure in the history of science care about ad hoc hypotheses? Ironically, the answers to these questions seem to be “Yes” and “No” in both cases. (...) Inspired by Paglieri and Woods’ recent proposal for a theory of enthymeme based on the principle of parsimony, I propose to approach the problem of ad hoc hypothesis by interpreting it as a kind of enthymeme resolution. One reason for this interpretative strategy lies in its potential for understanding the pervasiveness and the longevity of the Aristotelian scientific methodology embedded in the scientific practice throughout the ages. (shrink)

This paper examines flexibility in ad hoc networks and suggests that, even with cross-layer design as a mechanism to improve adaptation, a fundamental limitation exists in the ability of a single optimization function, defined a priori, to adapt the network to meet all quality-of-service requirements. Thus, code implementing multiple algorithms will have to be positioned within the network. Active networking and programmable networking enable unprecedented autonomy and flexibility for ad hoc communication networks. However, in order to best leverage the results (...) of active and programmable networking, metrics that indicate the nature and location of required flexibility need to be developed. The primary contribution of this paper is to propose a metric that couples network topological rate of change with the ability of a generic service to move itself to an optimal location in concert with the changing network. This metric points to a fundamental tradeoff among adaptation (changing service location), performance (sophistication or estimated minimum code size of the service), and the network’s ability to tune itself to a changing ad hoc network topology. (shrink)

It has been shown that the concept of ad hocness is ambiguous when applied to natural science. Here, it is established that a similar ambiguity is present also when the concept is applied in a philosophical debate. Neil Tennant’s proposal for solving Fitch’s paradox has been accused for being ad hoc several times, and he has presented several defenses. In this paper, it is established that ad hocness is never defined, although each author uses different notions of the concept. And (...) we see that no reason to adopt a certain notion is offered. (shrink)

I introduce a thin concept of ad hoc identity -- distinct from metaphysical accounts of either relative identity or absolute identity -- and an equally thin account of concepts and their content. According to the latter minimalist view of concepts, the content of a concept has behavioral consequences, and so content can be bounded if not determined by appeal to linguistic and psychological evidence. In the case of counting practices, this evidence suggests that the number concept depends on a notion (...) of identity at least as strong as ad hoc identity. In the context of nonrelativistic QM in particular, all of the counting procedures appealed to in the existing literature on nonindividuality are shown to involve ad hoc identity. I then show that Goyal Complementarity and the associated derivation of a strong symmetrization principle in QM can be understood in terms ad hoc identity. Specifically, persistence and non-persistence models of quantum processes are seen to be complementary in the sense that they involve two relations of ad hoc identity that occasionally overlap in empirically meaningful ways. Finally, I attempt to draw out consequences for theories of nonindividuality from the above conceptual analysis. The upshot is that counting and definite cardinality are incompatible with nonindividuality, and that none of the counting procedures cited for quantum phenomena offer positive support for an interpretation in terms of nonindividuals. (shrink)

Our utterances are typically if not always "situated," in the sense that they are true or false relative to unarticulated parameters of the extra-linguistic context. The problem is to explain how these parameters are determined, given that nothing in the uttered sentences indicates them. It is tempting to claim that they must be determined at the level of thought or intention. However, as many philosophers have observed, thoughts themselves are no less situated than utterances. Unarticulated parameters need not be mentally (...) represented. In this paper, I try to make precise the notion of representation at stake here. In one sense of 'representation', something is represented if it is inferentially relevant. In another, less demanding sense, something is represented if it is relevant to the construction of a context-sensitive, ad hoc concept. Ad hoc concepts act as "proxies" for cognitively more demanding representations. They "imitate" the latter's epistemic and pragmatic roles while being inferentially less sophisticated. Thus, there are two senses in which a thought can be said to be situated: (1) its truth-value is relative to a non-represented contextual parameter, (2) its truth-value is not itself relative, but it involves a context-sensitive, ad hoc concept. (shrink)

Relevance Theory makes one of the strongest defenses of the thesis of local linguistic underdetermination. According to this thesis, the intuitive concept expressed by a lexical item in the utterance of a sentence is an ad hoc concept. Ad hoc concepts result from a linguistically free pragmatic process. The postulation of ad hoc concepts is due to the fact that the sort of cognitive organization they introduce is held as necessary to satisfy the demands that, for this Theory, imposes the (...) understanding of intuitive concepts. Here I propose that our cognitive system can satisfy these demands without tolerating propositions basically determined by ad hoc concepts. I also suggest that the information provided by ad hoc concepts is dispensable for the understanding of intuitive concepts. Finally, I propose a local lexical position according to which, the intuitive concept expressed by a lexical item is the concept lexically associated with that item. (shrink)

I offer an account of ad hocness that explains why the adoption of an ad hoc auxiliary is accompanied by the disconfirmation of a hypothesis H. H must be conjoined with an auxiliary a′, which is improbable antecedently given H, while ~H does not have this disability. This account renders it unnecessary to require, for identifying ad hocness, that either a′ or H have a posterior probability less than or equal to 0.5; there are also other reasons for abandoning that (...) condition. I distinguish between formal ad hocness, which is bad in the probabilistic sense that it results in disconfirmation of H, and argumentative ad hocness, which actually involves bad reasoning on the part of a subject. The latter is what I call “not counting the cost.” This distinction allows us to see why the 0.5 condition appeared attractive in the first place. The concept of not counting the cost also has implications for other areas of research, including both a Bayesian concept of unfalsifiability and the classic epistemological question of the problem of the external world. (shrink)

The Dead Past Growing Block theory of time—DPGB-theory—is the metaphysical view that the past and the present tenselessly exist, whereas the future does not, and that only the present hosts mentality, whereas the past lacks it and is, in this sense, dead. One main reason in favour of this view is that it is immune to the now-now objection or epistemic objection (which aims at undermining the certainty, within an A-theoretical universe, of being currently experiencing the objective present time). In (...) this paper, I examine the additional arguments offered by P. Forrest and G. A. Forbes to back the DPGB-theory and show that they do not work. I also examine a proposal to rescue the DPGB-theory suggested by an anonymous reviewer for this journal and argue that it does not work either. Moreover, in line with D. Braddon-Mitchell and against Forbes, I argue that the DPGB-theory is indeed committed to the existence of zombies in the past. Being ad hoc and burdened by a very odd and counterintuitive ontological commitment, the DPGB-theory turns out to be rather unpalatable. (shrink)

In relevance-theoretic pragmatics thelower-levelorfirst-order explicatureis a propositional form resulting from a series of inferential developments of the logical form. It amounts to the message the speaker communicates explicitly. Thehigher-levelorsecond-order explicatureis a description of the speech act that the speaker performs, her affective attitude towards what she says or her epistemic stance to the communicated information. Information about the speaker’s affective attitude or epistemic stance need not solely be represented in the latter, though. It could be included as beliefs in the (...) mental files of pragmatically adjusted conceptual representations featuring in lower-level explicatures. Those beliefs would originate as lexical pragmatic processes operate and their representation would be triggered by elements like evaluative morphemes, expressive expletives, insulting terms and evidential participles. Although they may be true or false in their own right, such beliefs would not affect the truth-conditional content of the expressed proposition. (shrink)

Ad hoc concepts are highly-context dependent representations humans construct to deal with novel or uncommon situations and to interpret linguistic stimuli in communication. In the last decades, such concepts have been investigated both in experimental cognitive psychology and within pragmatics by proponents of so-called relevance theory. These two research lines have however proceeded in parallel, proposing two unconnected strategies to account for the construction and use of ad hoc concepts. The present work explores the relations between these two approaches and (...) the possibility of merging them into a unique account of the internal structure of ad hoc representations and of the key processes involved in their constructions. To this purpose, we first present an integrated two-level account of the construction of ad hoc representations from lexical concepts; then, we show how our account can be embedded in a conceptual space framework that allows for a natural, geometrical interpretation of the main steps in such a construction process. After discussing in detail two main examples of the construction of ad hoc concepts within conceptual spaces, we conclude with some remarks on possible extensions of our approach. (shrink)