This chapter surveys hybrid theories of well-being. It also discusses some criticisms, and suggests some new directions that philosophical discussion of hybrid theories might take.

Time passes; sometimes swiftly, sometimes interminably, but always it passes. We see the world change as events emerge from the shroud of the future, clandestinely slinking into the past almost immediately as though they are reluctant to meet our gaze: children are born, old friends and relatives die, governments once full of youthful enthusiasm wane. If the Earth were sentient, it might feel itself being torn apart as tectonic plates diverge, and chuckle as it outlived species upon species of transient (...) parasites. How could anyone possibly deny that time passes? (shrink)

In twelve new essays, contributors explore hybrid theories in metaethics and other normative domains.

Psychologists of concepts’ traditional assumption that there are many properties common to all concepts has been subject to devastating critiques in psychology and in the philosophy of psychology. However, it is currently unclear what approach to concepts is best suited to replace this traditional assumption. In this article, we compare two competing approaches, the Heterogeneity Hypothesis and the hybrid theories of concepts, and we present an empirical argument that tentatively supports the former over the latter.

‘Hybrid’ theories of personal good, defended by e.g. Parfit, Wolf, and Kagan, equate it, not with a subjective state such as pleasure on its own, nor with an objective state such as knowledge on its own, but with a whole that supposedly combines the two. These theories apply Moore's principle of organic unities, which says the value of a whole needn't equal the sum of the values its parts would have by themselves. This allows them, defenders say, (...) to combine the attractions of purely subjective and purely objective views. This common understanding of the theories is, however, mistaken. At the most fundamental level they don't combine a subjective and an objective element but two objective ones. Once this is understood, their attraction as hybrid theories diminishes: the value in their wholes may be just the sum of the values in their parts. (shrink)

A hybrid theory is any moral theory according to which different classes of individuals ought to be treated according to different principles. We argue that some hybrid theories are able to meet standards of psychological plausibility, by which we mean that it’s feasible for ordinary human beings to understand and act in accord with them. Insofar as psychological plausibility is a theoretical virtue, then, such hybrid theories deserve more serious consideration. To make the case for (...) this view, we explain what psychological plausibility is and why we might value it, why the human/animal divide appears to be an entrenched feature of human psychology, and why Robert Nozick’s hybrid theory doesn’t go far enough. Finally, we make the case that a more promising psychologically plausible hybrid theory, with respect to humans and animals, will be (at least) at tribrid theory—that is, positing three domains rather than two. (shrink)

Bex analyzes the case with an informal version of his hybrid theory, which combines scenario construction and argumentation. Arguments based on evidence can be used to reason about alternative scenarios. Bex claims that his hybrid theory provides the best of both worlds by combining cognitively feasible story‐based reasoning with more detailed rational argumentation. However, like the argument‐based approach, the hybrid theory does not provide a systematic account of uncertainty.

A provoking new approach to how we understand metaphors thoroughly comparing and contrasting the claims made by relevance theorists and cognitive linguists. The resulting hybrid theory shows the complementarity of many positions as well as the need and possibility of achieving a broader and more realistic theory of our understanding.

There are two important traditions in the philosophy of induction. According to one tradition, which has dominated for the last couple of centuries, inductive arguments are warranted by rules. Bayesianism is the most popular view within this tradition. Rules of induction provide functional accounts of inductive support, but no rule is universal; hence, no rule is by itself an accurate model of inductive support. According to another tradition, inductive arguments are not warranted by rules but by matters of fact. Norton’s (...) material theory of induction (MTI) is an influential view within this tradition. Norton’s MTI fails to provide an account of inductive support, but it provides a good account of inductive warrant that can help us define the domain of validity of each rule of induction. Despite their limitations, both approaches to induction are illuminating important aspects of how relations of inductive support work. In this article I present a hybrid theory of induction (HTI), in which I acknowledge and articulate the role of both rules and matters of fact in our understanding of inductive support. According to the HTI, rules of induction accurately describe relations of inductive support when they are warranted, and a rule of induction is warranted if the right facts about the matter of the induction obtain. Crucially, the HTI allows us to address the main challenges that each tradition faces while retaining their strengths, thus obtaining a functional and accurate account of inductive support. The HTI also provides a useful general framework to examine and understand induction, to make sense of how different rules of induction can coexist and to tackle some problems in epistemology. Moreover, the HTI allows us to clarify and resolve some current debates on induction, like the apparent divide between Norton and rule-based theorists. (shrink)

Hybrid theories are metaethical theories concerning the content of sentences about moral value. These theories claim that sentences with ethical content express two kinds of mental state. One state is an affect‐like state. The other is a belief‐like state. The expressed affect‐like state will involve a moral attitude of some kind, such as approval, but it is not part of the truth‐conditions of the sentence. We can divide hybridists into two kinds.

What is it that we are doing when we make ethical claims and judgments, such as the claim that we morally ought to assist refugees? This dissertation introduces and defends a novel theory of ethical thought and discourse. I begin by identifying the surface features of ethical thought and discourse to be explained, including the realist and cognitivist (i.e. belief-like) appearance of ethical judgments, and the apparent close connection between making a sincere ethical judgment and being motivated to act on (...) it. I examine prominent attempts to explain these features, with a focus on recent ‘hybrid’ theories combining elements of expressivism and cognitivism. Despite their initial promise, I argue that extant hybrid theories are nevertheless committed to problematic semantic, metasemantic, or pragmatic assumptions. I then discuss what I take to be the strongest existing option, ethical neo-expressivism (Bar-On and Chrisman, 2009; Bar-On, Chrisman, and Sias, 2014), and develop it into an explicitly hybrid theory proposing that ethical judgments incorporate both motivationally-charged affective states and moral beliefs. I then supplement this account with a theory of the proper function (following Millikan, 1984) of ethical claims and judgments, arguing that they function simultaneously to track the morally salient features of social situations, and to coordinate our behavior around these features. Finally, I defend one of the cognitivist commitments of the theory – namely, that objective moral knowledge is possible – by applying recent work on the epistemology of fundamental or ‘core’ intellectual commitments (Lynch, 2012; Pritchard, 2016) to the moral realm. (shrink)

In this paper, I present main ideas of the Hybrid Theory of Reference for Proper Names. First, I try to define the ​position of the Hybrid Theory within the discussion about reference. Then I briefly explain most significant aspects of the theory as they were defined by Gareth Evans. Apart from that, I also offer some additions to the theory. The addition, I spend most space on concerns phrases that I call “mock names” which are expressions that look (...) like proper names but in fact are nothing more than abbreviations for descriptions used attributively. (shrink)

Amongst philosophers, there is ongoing debate about what successful event remembering requires. Causal theorists argue that it requires a causal connection to the past event. Simulation theorists argue, in contrast, that successful remembering requires only production by a reliable memory system. Both views must contend with the fact that people can remember past events they have experienced with varying degrees of accuracy. The debate between them thus concerns not only the account of successful remembering, but how each account explains the (...) various forms of memory error as well. Advancing the debate therefore must include exploration of the cognitive architecture implicated by each view and whether that architecture is capable of producing the range of event representations seen in human remembering. Our paper begins by exploring these architectures, framing casual theories as best suited to the storage of event instances and simulation theories as best suited to store schemas. While each approach has its advantages, neither can account for the full range of our event remembering abilities. We then propose a novel hybrid theory that combines both instance and schematic elements in the event memory. In addition, we provide an implementation of our theory in the context of a cognitive architecture. We also discuss an agent we developed using this system and its ability to remember events in the blocks world domain. (shrink)

The destruction and pollution of the natural environment poses two problems for philosophers. The first is political and pragmatic: which theory of the environment is best equipped to impact policymakers heading as we are toward a series of potential ecocatastrophes? The second is more central: On the environment philosophers tend to fall either side of an irreconcilable divide. Either our moral concerns are grounded directly in nature, or the appeal is made via an anthropocentric set of interests. The lack of (...) a common ground is disturbing. In this paper I attempt to diagnose the reason for this lack. I shall agree that wild nature lacks features of intrinsic moral worth, and that leaves a puzzle: Why is it once we subtract the fact that there is such a lack, we are left with strong intuitions against the destruction and/or pollution of wild nature? Such intuitions can be grounded only in a strong sense of aesthetic concern combined with a common-sense regard for the interests of sentient life as it is indirectly affected by the quality of the environment. I suggest also that of the positions on offer, a hybrid theory of the environment is best suited to address our first problem, that of having an effective influence in the polity. (shrink)

This paper articulates and defends a novel hybrid account of well-being. We will call our view a Robust Hybrid. We call it robust because it grants a broad and not subservient role to both objective and subjective values. In this paper we assume, we think plausibly but without argument, that there is a significant objective component to well-being. Here we clarify what it takes for an account of well-being to have a subjective component. Roughly, we argue, it must (...) allow that favoring attitudes that are not warranted by the lights of objective values can ground benefits. Given this understanding, we show that there is an important and unrecognized expansion in the resources available to fully objectivist views: namely that such views can help themselves to the value of warranted love of objective goods. Such a move by the objectivist can help them respond to concerns that, on their view, a person’s well-being can be too alien to them. We next argue that, nonetheless, such objectivist views are still unconvincing due to their lack of a subjective component. This motivates a move from fully objective accounts to hybrid accounts. We show that many prominent hybrid theories in the literature are inadequate because they implausibly minimize the subjective component. This motivates a move to a robust hybrid view that has an expanded subjectivist component. We conclude with some remarks about the interrelation between the subjective and objective components in the hybrid account that we favor and a role for resonance in a theory of well-being other than serving as a hard constraint on any benefit. (shrink)

What makes it the case that a given experience is pleasurable? According to the felt-quality theory, each pleasurable experience is pleasurable because of the way that it feels—its “qualitative character” or “felt-quality”. According to the attitudinal theory, each pleasurable experience is pleasurable because the experiencer takes certain attitudes towards it. These two theories of pleasure are typically framed as rivals, but it could be that they are both partly right. It could be that pleasure is partly a matter of (...) felt-quality, and partly a matter of attitudes. It could be that a hybrid theory is true. In this paper, I aim to advance the cause of hybrid theories of pleasure. I do this in two ways. I begin by examining the challenges which motivate the search for a hybrid theory. I call these the HONEST challenges: Heterogeneity, Oppositeness, Normativity, Euthyphro, Separateness, and Togetherness. The first three challenges—HON—are challenges for the felt-quality theory. The second three challenges—EST—are challenges for the attitudinal theory. Having established the HONEST challenges, I then describe and motivate a particular cluster of hybrid theories which I will call dispositional hybrid theories. According to these theories, pleasurable experiences are all and only those experiences which dispose us to desire them in virtue of feeling the way that they do. The dispositional theories deliver on the promise of hybrid theories: because they appeal to both felt-qualities and attitudes, they have the resources to avoid most, if not all, of the HONEST challenges. (shrink)

I examine two sets of experimental results about the semantics of general terms, by Genone and Lombrozo (2012) and by Nichols, Pinillos and Mallon (forthcoming) that allegedly reveal significant variations in semantic intuitions as regards the correct application of general terms. The two sets of authors propose two entirely different semantic treatments: Genone and Lombrozo espouse a hybrid semantics whereas Nichols, Pinillos and Mallon are inclined towards an appeal to ambiguity. I cast some doubts on the coherence of a (...) hybrid theory and argue in favor of the ambiguity approach. But I also argue that the sort of ambiguitiy Nichols, Pinillos and Mallon postulate is easy to incorporate to non-descriptivist approaches. (shrink)

Noël Carroll proposes a generalist theory of art criticism, which essentially involves evaluations of artworks on the basis of their success value, at the cost of rendering evaluations of reception value irrelevant to criticism. In this article, I argue for a hybrid account of art criticism, which incorporates Carroll's objective model but puts Carroll-type evaluations in the service of evaluations of reception value. I argue that this hybrid model is supported by Kant's theory of taste. Hence, I not (...) only present an alternative theory of metacriticism, which has the merit of reinstating the centrality of reception value in art critics’ evaluations, but also show that, contrary to a common conception, Kant's aesthetic theory can house a fruitful account of art criticism. The benefit of this hybrid account is that, despite being essentially particularist, it should be appealing even to generalists, including Carroll. (shrink)

How should scarce health-related resources be allocated? This paper argues that values that apply to these decisions fail to always fully determine what we should do. Health maximization and allocation-according-to-need are suggested as two values that should be part of a general theory of how to allocate health-related resources. The “small improvement argument” is used to argue that it is implausible that one alternative is always better, worse, or equal to another alternative with respect to these values. Approaches that rely (...) on these values are thus incomplete. To deal with this, it is suggested that we ought to use incomplete theories in a two-step process. Such a process first discards ineligible alternatives, and, second, uses reasons grounded in collective commitments to identify a unique, best alternative in the remaining set. (shrink)

Hybrid theories of rationality of the sort developed by Bernard Gert have significant attractions. I argue, though, that Gert's is not the only way to formulate a hybrid view, and not the best. An improved hybrid view would draw on Sidgwick as well as on Gert.

Many philosophers have claimed that we might do well to adopt a hybrid theory of well-being: a theory that incorporates both an objective-value constraint and a pro-attitude constraint. Hybrid theories are attractive for two main reasons. First, unlike desire theories of well-being, hybrid theories need not worry about the problem of defective desires. This is so because, unlike desire theories, hybrid theories place an objective-value constraint on well-being. Second, unlike objectivist (...) class='Hi'>theories of well-being, hybrid theories need not worry about being overly alienating. This is so because, unlike objectivist theories, hybrid theories place a pro-attitude constraint on well-being. However, from the point of view of objectivists, hybrid theories are not objectivist enough, and this can be seen clearly in missing-desires cases. For instance, hybrid theories entail that, if someone lacks the desire for health, then health is not a component of her well-being. This, objectivists say, is implausible. It is obvious, objectivists say, that someone’s life goes better for herself inasmuch as she is healthy, and hence that health is a component of her welfare. This paper focuses on the missing-desires objection (as leveled by objectivists) to hybrid theories of well-being. My argument is that the missing-desires objection can be answered in a way that is generally convincing and, in particular, in a way that pays a good deal of respect to objectivist intuitions about well-being. My hope, then, is that this paper will help to persuade objectivists about well-being to become hybrid theorists. (shrink)

In this dissertation, I argue that all extant theories of prudential value are either a) enumeratively deficient, in that they are unable to accommodate everything that, intuitively, is a basic constituent of prudential value, b) explanatorily deficient, in that they are at least sometimes unable to offer a plausible story about what makes a given thing prudentially valuable, or c) both. In response to the unsatisfactory state of the literature, I present my own account, the Disjunctive Hybrid Theory (...) or DHT. DHT answers to and remedies each of the above inadequacies in a way that no other approach can. This account has the following general structure:Disjunctive Hybrid Theory (DHT): Thing x is basically good for person P if and only if x is either a) cared about (sufficiently and in the right way) by P, b) a bearer of (the right kind of) attitude-independent value, or c) both.Although it follows other recent accounts in combining elements from objective and subjective theories, DHT is a hybrid theory of a quite new kind. This is because it denies both subjective necessity (the constraint that, if thing x is to be basically good for person P, P must have some pro-attitude toward x) and objective necessity (the constraint that, if thing x is to be basically good for person P, x must have some attitude-independent value). I argue that the rejection of both necessity claims is called for if we are to move beyond the enumerative and explanatory limitations of existing accounts.I begin by outlining the general structure of DHT. I then argue, against various recent authors, that desire-satisfactionism remains the most appealing subjectivist approach to prudential value, in that it is best able to capture the central subjectivist insight. This insight is that a person can confer prudential value upon things by caring about them (sufficiently and in the right way). The subjectivist strand of DHT will thus be a version of desire-satisfactionism, which must be interpreted in line with what I call the object, as opposed to the combo, view. I move on to further motivate and develop the second, objectivist strand of DHT. This part of the theory involves a commitment to robustly attitude-independent prudential goods. I close by addressing some puzzles for the theory, and considering some of its more specific applications. (shrink)

Both descriptivism and the causal theory of reference fail to account for the meaning of theoretical terms in a way consistent with scientific realism. Faced with this problem, hybrid theories of reference have been developed. They combine features of both descriptivism and the causal theory and seek to capture the advantages of each. In this work, we critically analyze two strategies to articulate hybrid theories of reference in the face of the problem of the meaning of (...) theoretical terms. They are exemplified by the proposals of Psillos and Kitcher. We argue that neither of these strategies is successful in articulating the descriptive and causal elements in a genuine hybrid theory of reference that satisfies the standards of scientific realism. (shrink)

Martínez-Manrique contends that we overlook a possible nonconnectionist vehicle theory of consciousness. We argue that the position he develops is better understood as a hybrid vehicle/process theory. We assess this theory and in doing so clarify the commitments of both vehicle and process theories of consciousness.

John Punch (or Ponce; Latin Joannes Poncius, or, occasionally, Pontius, 1599/1603–1661), an Irish Franciscan in exile, unorthodox Scotist and a skilled collaborator of the famous Luke Wadding, is interesting for his fresh and open-minded approach to traditional Scotist doctrines. His take on the theory of relations, which is the topic of this paper, is no exception. As I will show, in his Integer philosophiae cursus ad mentem Scoti1 he only pretends to be defending a doctrine considered to be traditionally "Scotist," (...) his true mind being apparently quite different.In Punch's time, several competing theories of relations were in currency. The basic insight common, at least as a point of departure, to all scholastics... Read More. (shrink)

Contemporary debates about the nature of semantic reference have tended to focus on two competing approaches: theories which emphasize the importance of descriptive information associated with a referring term, and those which emphasize causal facts about the conditions under which the use of the term originated and was passed on. Recent empirical work by Machery and colleagues suggests that both causal and descriptive information can play a role in judgments about the reference of proper names, with findings of cross-cultural (...) variation in judgments that imply differences between individuals with respect to whether they favor causal or descriptive information in making reference judgments. We extend this theoretical and empirical line of inquiry to views of the reference of natural and nominal kind concepts, which face similar challenges to those concerning the reference of proper names. In two experiments, we find evidence that both descriptive and causal factors contribute to judgments of concept reference, with no reliable differences between natural and nominal kinds. Moreover, we find evidence that the same individuals’ judgments can rely on both descriptive and causal information, such that variation between individuals cannot be explained by appeal to a mixed population of “pure descriptive theorists” and “pure causal theorists.” These findings suggest that the contrast between descriptive and causal theories of reference may be inappropriate; intuitions may instead support a hybrid theory of reference that includes both causal and descriptive factors. We propose that future research should focus on the relationship between these factors, and describe several possible frameworks for pursuing these issues. Our findings have implications for theories of semantic reference, as well as for theories of conceptual structure. (shrink)

The relationship between libertarianism and state is a contested one. Despite pressing full and strict ownership of one’s person and any justly acquired goods, many libertarians have suggested ways in which a state, albeit limited, can be regarded as just. Peter Vallentyne has proposed that all plausible versions of libertarianism are compatible with what he calls ‘private-law states’. His proposal is underpinned by a particular conception of rights, which brings Interest Theory of rights and Will Theory of rights together. If (...) convincing, Vallentyne’s theory of rights enables libertarians to accommodate a limited but nevertheless coercive state that can act without the full consent of the affected citizen. In this paper, it is argued that Vallentyne’s hybrid theory of rights is implausible from a libertarian perspective as well as fails to align itself with common and deeply held moral intuitions. Hence the conflict between mainstream libertarianism and the state is not solved by Vallentyne’s proposal. (shrink)

A notorious debate in the ethics of healthcare rationing concerns whether to address rationing decisions with substantial principles or with a procedural approach. One major argument in favour of procedural approaches is that substantial principles are indeterminate so that we can reasonably disagree about how to apply them. To deal with indeterminacy, we need a just decision process. In this paper I argue that it is a mistake to abandon substantial principles just because they are indeterminate. It is true that (...) reasonable substantial principles designed to deal with healthcare rationing can be expected to be indeterminate. Yet, the indeterminacy is only partial. In some situations we can fully determine what to do in light of the principles, in some situations we cannot. The conclusion to draw from this fact is not that we need to develop procedural approaches to healthcare rationing, but rather that we need a more complex theory in which both substantial principles and procedural approaches are needed. (shrink)

A growing number of applications of automated reasoning exhibitsthe necessity of flexible deduction systems. A deduction system should beable to execute inference rules which are appropriate to the given problem.One way to achieve this behavior is the integration of different calculi. Thisled to so called hybrid reasoning [22, 1, 10, 20] which means the integrationof a general purpose foreground reasoner with a specialized background reasoner. A typical task of a background reasoner is to perform special purposeinference rules according to (...) a built-in theory. The aim of this paper is togo a step further, i.e. to treat the background reasoner as a hybrid systemitself. The paper formulates sufficient criteria for the construction of complete calculi which enable reasoning under hybrid theories combined fromsub-theories. For this purpose we use a generic approach described in [20].This more detailed view on built-in theories is not covered by the knowngeneral approaches [1, 3, 6, 20] for building in theories into theorem provers.The approach is demonstrated by its application to the target calculi of thealgebraic translation [9] of multi-modal and extended multi-modal [7] logicto first-order logic. (shrink)

In this paper, I will suggest an unorthodox hybrid theory of ethical justification that combines, on an ontological level, a realist approach with constructivist elements. On an epistemological level, the realist part of the theory will be squared with an intuitionist account. Eventually, the suggested hybrid theory will take the form of an intuitionist ethics of persons. I will start with briefly sketching the ontological shape of the relevant concept of person whereby I will extensively draw on Kant (...) and endorse a realist reading of his ethical theory (2.). Subsequently, I will explain why and how constructivist elements must complement the picture (3.). Then, I will focus on the epistemological shape of the theory. In particular, I will suggest an intuitionist reading of Kant’s doctrine of “the fact of reason” (4.). Next, I will briefly comment on classical intuitionism and on Bernard William’s notion of convergence in ethics (5.). Subsequently, I will compare my approach with Robert Audi’s attempt to refine a Rossian type of intuitionism (6.). Finally, I will revisit the charge of dogmatism that has traditionally been raised against intuitionism (7.). (shrink)

Moral language displays a characteristic duality. On the one hand, moral claims seem to be similar to descriptive claims: To say that an act is right seems to be a matter of making an assertion, thus indicating that the speaker has a moral belief about which she can be correct or mistaken. On the other hand, moral claims seem to be different from descriptive claims: There is a sense in which, by claiming that an act is right, a speaker indicates (...) that she is inclined to perform the act, to want others to perform it, and to react with praise towards those who do it. Hybrid theories maintain that utterances of moral sentences have both a descriptive and a practical linguistic function. In this thesis, I investigate how a hybrid theory can best accommodate the descriptive and the practical aspects of moral language. I evaluate and criticize the way that existing hybrid theories have proposed to explain the duality of moral language. The main arguments against these views are that they either: fail to accommodate the way that the practical or attitudinal import of moral claims vary across different contexts and linguistic environments; or that they fail to show how the practical or attitudinal import is reliably inferred by interlocutors in virtue of general communicative principles. I develop and defend a new hybrid theory called ‘dynamic descriptivism’. This theory accommodates the duality of moral language by appeal to the way that moral utterances affect a dimension of communication which consists of the shared assumptions that interlocutors mutually assume to mutually accept. Moreover, I discuss a problem which has affected a wide range of theories of moral language – including existing hybrid theories – which is the problem of explaining what it is that interlocutors disagree about when they disagree about matters of morality. I argue that that dynamic descriptivism offers new resources for solving this problem. (shrink)

What if the Big Bang was an exodus of non-existing reality into existence? In this book a theory of the reality is started from the principle that 'existing takes time' but in states of the universe there are pre-things in moments, thus non-existing, which realize in strings over specific time intervals as existing phenomena. Causality must be reviewed now and new paradigms for reality follow. The existing and observed universe are discontinuous and "limits" in mathematical models do not correspond to (...) reality. New interpretations in evolution theory and the human condition are being investigated. (shrink)

Philosophers should consider a hybrid meta-ethical theory that includes elements of both moral expressivism and moral error theory. Proponents of such an expressivist-error theory hold that all moral utterances are either expressions of attitudes or expressions of false beliefs. Such a hybrid theory has two advantages over pure expressivism, because hybrid theorists can offer a more plausible account of the moral utterances that seem to be used to express beliefs, and hybrid theorists can provide a simpler (...) solution to the Frege-Geach problem. The hybrid theory has three advantages over pure error theory, because hybrid theorists can offer a more plausible account of the moral utterances that seem to be used to express attitudes, hybrid theorists can more easily explain moral motivation, and hybrid theorists can avoid the implausible claim that all moral discourse is radically mistaken. Accordingly, such a hybrid theory should be more attractive than pure expressivism or pure error theory to philosophers who are skeptical about moral facts and truth. (shrink)

This article examines G. A. Cohen’s endorsement of a hybrid ethical theory and its relationship to his critique of John Rawls’s egalitarian liberalism. Cohen claimed that Rawls’s appeal to special incentives was a distortion of his own difference principle. I argue that Cohen’s acceptance of a personal prerogative (the central element of Samuel Scheffler’s version of a hybrid ethical theory) has several untoward consequences. First, it illuminates how any reasonable challenge to Rawls’s liberalism must recognise Thomas Nagel’s arguments (...) concerning the problems that arise when one attempts to implement a political theory analogous to a hybrid theory of ethics. Second, it undermines Cohen’s critique of Rawls. Third, it undermines the plausibility of Cohen’s ethos-driven social egalitarianism. The article concludes that, despite Nagel’s concerns, the most plausible form of egalitarianism—one that can accommodate the requirements of a hybrid ethical theory—will be Rawlsian, rather than Cohen’s ethos-based system. (shrink)

This paper presents a theory of reasoning with evidence in order to determine the facts in a criminal case. The focus is on the process of proof, in which the facts of the case are determined, rather than on related legal issues, such as the admissibility of evidence. In the literature, two approaches to reasoning with evidence can be distinguished, one argument-based and one story-based. In an argument-based approach to reasoning with evidence, the reasons for and against the occurrence of (...) an event, e.g., based on witness testimony, are central. In a story-based approach, evidence is evaluated and interpreted from the perspective of the factual stories as they may have occurred in a case, e.g., as they are defended by the prosecution. In this paper, we argue that both arguments and narratives are relevant and useful in the reasoning with and interpretation of evidence. Therefore, a hybrid approach is proposed and formally developed, doing justice to both the argument-based and the narrative-based perspective. By the formalization of the theory and the associated graphical representations, our proposal is the basis for the design of software developed as a tool to make sense of the evidence in complex cases. (shrink)

In this paper, I have two primary goals. First, I show that the causal-based story approach in A hybrid formal theory of arguments, stories and criminal evidence is ill suited to negative causation. In the literature, the causal-based approach requires that hypothetical stories be causally linked to the explanandum. Many take these links to denote physical or psychological causation, or temporal precedence. However, understanding causality in those terms, as I will show, cannot capture cases of negative causation, which are (...) of interest to the Law. In keeping with this, I also discuss some of the difficulties Hybrid Theory invites by remaining silent on the nature of the causal links. In my second aim, I sketch a way for Hybrid Theory to overcome this problem. By replacing the original, underlying causal structure with contrastive causation in the law, Hybrid Theory can represent reasoning in which the evidence that is appealed to is causally linked via negative causation to the explananda. (shrink)

This is the first book-length treatment of hybrid logic and its proof-theory. Hybrid logic is an extension of ordinary modal logic which allows explicit reference to individual points in a model. This is useful for many applications, for example when reasoning about time one often wants to formulate a series of statements about what happens at specific times. There is little consensus about proof-theory for ordinary modal logic. Many modal-logical proof systems lack important properties and the relationships between (...) proof systems for different modal logics are often unclear. In the present book we demonstrate that hybrid-logical proof-theory remedies these deficiencies by giving a spectrum of well-behaved proof systems for a spectrum of different hybrid logics. (shrink)

This paper extends previous work of mine on a view of human well-being that is a hybrid of objective-list theories and desire theories. Though some of what I say traverses old ground, much of what I say is new – new, that is, not in terms of ultimate conclusions, but rather in terms of (a) routes toward these ultimate conclusions and (b) certain implications of these ultimate conclusions (e.g., implications concerning the measurement of well-being). There are two (...) different visions of what human beings are that I privilege and attempt to synthesize in this paper. One of these visions pushes us toward an objective-list theory. This vision is a broadly Aristotelian one according to which humans have various capacities that are central to their functioning well as the kinds of things they are, that is, as human beings. Though this broadly Aristotelian vision captures something necessary for well-being, it is, as it were, only half of the story. The other half of the story derives from a vision of human beings as unique individuals with different sets of intrinsic desires, and this desire-focused vision of humans is itself informed by Jacques Lacan and his view that each human self is constituted by a particular and dynamic chains-of-signifiers-plus-desire-flow structure. I start by briefly discussing mental state theories (section 1). Then I discuss objective-list theories at some length (sections 2-3), and, while doing this, I occasionally comment on pro-attitude theories (e.g., desire theories). After that, I present the hybrid theory of well-being that I favor and defend it against some objections (section 4). Lastly, I conclude the paper (section 5). (shrink)