Permissivist metaontology proposes answering customary existence questions in the affirmative. Many of the existence questions addressed by ontologists concern the existence of theoretical entities which admit precise formal specification. This causes trouble for the permissivist, since individually consistent formal theories can make pairwise inconsistent demands on the cardinality of the universe. We deploy a result of Gabriel Uzquiano’s to show that this possibility is realised in the case of two prominent existence debates and propose rejecting permissivism in favour of (...) substantive ontology conducted on a cost–benefit basis. (shrink)

It may seem that epistemic and practical rationality weigh reasons differently, because ties in practical rationality tend to generate permissions and ties in epistemic rationality tend to generate a requirement to withhold judgment. I argue that epistemic and practical rationality weigh reasons in the same way, but they have different "default biases". Practical rationality is biased toward every option being permissible whereas epistemic rationality is biased toward withholding judgment's being required.

This chapter provides an account of what dogmatism is, why the term matters, and how it applies to withholding judgment. Roughly, a person is dogmatic about P when a certain problematic personal investment—a superiority complex, broadly construed—biases their judgment concerning whether P. The term dogmatism and its cognates matter because of their social function. To accuse you of dogmatism is to signal how you are to be treated: your judgment or behavior needs to be “brought down to earth,” so that (...) you have a more accurate view of yourself or so you stop treating others as less important or less than. Withholding judgment can be dogmatic in the same way that belief is dogmatic. Belief (withholding) is dogmatic just when the relevant problematic personal investment results in biases that keep a person stuck in that belief (withholding). (shrink)

We introduce a suitable notion of eight-shaped curve in the product S × ℝ of a Suslin line S for the real line ℝ, and we prove that if S is dense in itself, then every collection of pairwise disjoint eight-shaped curves in S × ℝ is countable. This parallels a folklore result which holds for the real plane.

This article explores the justification of states' territorial rights. It starts by introducing three questions that all current theories of territorial rights attempt to answer: how to justify the right to settle, the right to exclude, and the right to settle and exclude with reference to a particular territory. It proposes a ‘permissive’ theory of territorial rights, arguing that the citizens of each state are entitled to the particular territory they collectively occupy, if and only if they are also politically (...) committed to the establishment of a global political authority realizing just reciprocal relations. The article is developed by introducing some key features of the permissive theory and by explaining how such an account addresses the questions of settlement, exclusion and particularity in ways that significantly improve on existing rival accounts (most prominently: acquisition theories, legitimacy-based theories and nationalist theories). (shrink)

In this article, we defend pairwise comparison as a method to resolve conflicting claims from different people that cannot be jointly satisfied because of a scarcity of resources. We consider Michael Otsuka's recent challenge that pairwise comparison leads to intransitive choices for the (someone who believes the numbers should not count in forced choices among lives) and Frances Kamm's responses to Otsuka's challenge. We argue that Kamm's responses do not succeed, but that the threat they are designed to (...) meet is illusory. Once the method of pairwise comparison is understood in a manner consistent with its proposed use, the challenge disappears. In making this argument, we examine questions about the interpretation of pairwise comparison and maintain that it must be understood as a method for ensuring that decisions are justifiable from the perspective of each affected individual. (shrink)

In this paper we propose an extension of Defeasible Logic to represent and compute different concepts of defeasible permission. In particular, we discuss some types of explicit permissive norms that work as exceptions to opposite obligations or encode permissive rights. Moreover, we show how strong permissions can be represented both with, and without introducing a new consequence relation for inferring conclusions from explicit permissive norms. Finally, we illustrate how a preference operator applicable to contrary-to-duty obligations can be combined with a (...) new operator representing ordered sequences of strong permissions. The logical system is studied from a computational standpoint and is shown to have linear computational complexity. (shrink)

If you injure me, it matters morally whether it was an accident or you did it intentionally, and whether you did it because you thought it would be fun. I take it that any ethical theory will have to include some explanation of why this is. There are two dominant views in the current debate about the moral significance of an agent’s intentions: The one is that the intention with which someone acts at least sometimes determines whether what she does (...) is right or wrong (permissible or impermissible). Proponents of the so-called doctrine of double-effect (DDE) hold that an action which has certain bad outcomes may be permissible if the bad consequences are only foreseen, even if the same action would be morally wrong if they were intended as a means. This is not the only way in which intentions could make a difference to an action’s permissibility, but it is the best-known defense that they do. According to the second view, intentions don’t matter in this way: they do not determine the permissibility of an action. They do matter, but in a different dimension of normative assessment: They determine whether the agent is a good or a bad person; or alternatively: they determine the “moral worth” of an action or its “meaning”, including its praiseworthiness or blameworthiness , or the severity of a wrong-doing. The main thesis is what Thomson called “The Irrelevance-of-Intentions-to-Permissibility Thesis” (for short: IIP) -/- [IIP] “It is irrelevant to the question whether X may do alpha what intention X would do alpha with if he or she did it.” -/- IIP is driven in part by skepticism about DDE: since – according to proponents of IIP - DDE is false, we must explain the relevance of intentions and reasons in a different way. Proponents of IIP tend not to consider the possibility that intentions might matter to permissibility in ways that are different from DDE. In this paper I do not focus on the arguments for or against DDE, but investigate IIP itself more closely, and look at some of the arguments for and against it. (shrink)

Survival is obviously important, but sometimes, under particular circumstances, life can become miserable, difficult, or intolerable; at that point, survival can seem like a punishment or misfortune. A patient who is in a vegetative state, unable to sustain life with dignity, and who is suffering from a terminal illness, has freedom to choose between life and death. The practice of "mercy killing," or euthanasia is an ongoing debate in the discussion of medical ethics. When it comes to making euthanasia decisions (...) for their incompetent patients, medical practitioners are faced with a problem. The moral dilemma of whether something is morally acceptable or not is moral in nature. The "end of life" issue is related to euthanasia should be legally acceptable under specific circumstances, such as when a patient is terminally sick, death is imminent, and treatment is unsuitable and ineffective. It is morally acceptable when a patient makes the autonomous decision to end his life or asks someone else to help him. In order to make an informed decision, the patient needs to be thoroughly informed about the diagnosis and prognosis of an incurable, deadly condition. However, in the context of a Muslim-majority population, where any argument for the legality of suicide (and, by extension, physician-assisted suicide) would be automatically rejected as contrary to Islamic moral and jurisprudential principles, this is an extraordinary request for the health service authorities of a developing country to consider. This paper discusses mainly non-voluntary active euthanasia. The discussion is conducted by giving a case study from Bangladesh. The situation in Bangladesh will also be examined in the paper's last section with regard to the permissibility of active euthanasia, specifically whether it can be done in our state given the socio-cultural-religious practices that are now in place. (shrink)

This paper provides a defence of the thesis that responsible belief is permissible rather than obliged belief. On the Uniqueness Thesis (UT), our evidence is always such that there is a unique doxastic attitude that we are obliged to have given that evidence, whereas the Permissibility Thesis (PT) denies this. After distinguishing several varieties of UT and PT, we argue that the main arguments that have been levied against PT fail. Next, two arguments in favour of PT are provided. (...) Finally, two motivations for PT are put forward by showing that PT is entailed by two views that are quite popular among theorists working on doxastic responsibility. If the arguments in this paper are successful, we not only have good reasons to prefer PT over UT, but also good reasons to think that the gap between the ways in which we are meant to normatively assess belief and action may not be as wide as has been thought. (shrink)

If Kant’s theory of justice is known for one thing, it is for offering a vision of a perfectly just society that is utterly disconnected from the imperfect societies that we occupy. The purity of Kant’s account has attracted criticism from those who claim that if a theory of justice is to be practical, it must offer more than a vision of a perfectly just society. It must also explain how existing societies mired in injustice are to be brought into (...) ever-closer conformity with the ideal that justice prescribes. In this essay, I will argue that this is exactly what Kant’s mature legal and political theory offers. To discern this feature of Kant’s theory, a neglected component must be integrated into his broader framework. This component is what Kant refers to in Toward Perpetual Peace as a permissive law of public right. (shrink)

This is a review essay of Jeff McMahan's recent book The Ethics of Killing : Problems at the Margins of Life. In the first part, I lay out the central features of McMahan's account of the wrongness of killing and its implications for when it is permissible to kill. In the second part of the essay, I argue that we ought not to accept McMahan's rejection of species membership as having any bearing on whether it is permissible to kill a (...) particular individual, as there are ways of understanding its relevance that are more plausible than McMahan allows. (shrink)

In "Epistemic Permissiveness", Roger White presents several arguments against Extreme Permissivism, the view that there are possible cases where, given one's total evidence, it would be rational to either believe P, or to believe ~P. In this paper, we carefully reconstruct White's arguments and then argue that they do not succeed.

This paper proposes a semantics for free choice permission that explains both the non-classical behavior of modals and disjunction in sentences used to grant permission, and their classical behavior under negation. It also explains why permissions can expire when new information comes in and why free choice arises even when modals scope under disjunction. On the proposed approach, deontic modals update preference orderings, and connectives operate on these updates rather than propositions. The success of this approach stems from its capacity (...) to capture the difference between expressing the preferences that give rise to permissions and conveying propositions about those preferences. (shrink)

I wish to examine a rather different way of thinking about permissibility, one according to which, roughly speaking, an agent acts impermissibly if and only if he acts for reasons insufficient to justify him in doing what he does. For reasons that will emerge in Section II, I call this the inferential account of permissibility. I shall not here try to prove that this account is superior to its rivals. My aims are more modest. I shall develop the (...) inferential account, exhibiting some of its attractions along the way, and then show that it is invulnerable to a number of influential objections to the very idea that an agent's reasons for acting could be directly relevant to whether he acts permissibly. If these objections have seemed decisive, it is because we have not considered the full range of possible accounts. The inferential account of permissibility is both plausible and attractive---it deserves to be taken seriously. (shrink)

Given two structures${\cal M}$and${\cal N}$on the same domain, we say that${\cal N}$is a reduct of${\cal M}$if all$\emptyset$-definable relations of${\cal N}$are$\emptyset$-definable in${\cal M}$. In this article the reducts of the Henson digraphs are classified. Henson digraphs are homogeneous countable digraphs that omit some set of finite tournaments. As the Henson digraphs are${\aleph _0}$-categorical, determining their reducts is equivalent to determining the closed supergroupsG≤ Sym of their automorphism groups.A consequence of the classification is that there are${2^{{\aleph _0}}}$pairwise noninterdefinable Henson digraphs which (...) have no proper nontrivial reducts. Taking their automorphisms groups gives a positive answer to a question of Macpherson that asked if there are${2^{{\aleph _0}}}$pairwise nonconjugate maximal-closed subgroups of Sym. By the reconstruction results of Rubin, these groups are also nonisomorphic as abstract groups. (shrink)

Does it ever happen that there are things we shouldn’t do and the reasons we shouldn’t do them are moral reasons, yet doing them is not morally wrong? Surprisingly, yes. I argue for a category that has not been recognized by moral theorists: morally permissible moral mistakes. Sometimes a supererogatory action is the thing a person should do; in failing to act, one makes a morally permissible moral mistake. Recognizing the category of morally permissible moral mistakes solves a puzzle about (...) supererogation, expands the universe of possible moral views, and shows some apparently inconsistent moral views to be consistent. (shrink)

Various people have claimed that some cases involve indeterminate permissibility. However, it’s unclear what guidance one can take away from this fact: are indeterminately permissible options choiceworthy and if so when? In this paper, I present a counterexample that undermines two existing responses to this question and I then present two alternative solutions that avoid this counterexample.

This chapter considers whether our moral entitlement to manifest certain kinds of partiality stems from a morally basic permission to be partial, or whether it can be accounted for in some other way. In particular, it explores the possibility of justifying partial conduct via a general moral prerogative to pursue our own projects. On this approach, in contexts of plural agency, where two or more people together pursue a joint project, we would have permission to favour our co-agents — but (...) only in ways that relate to our joint project. While this approach might limit the scope of morally permissible partiality, it seems more faithful to the concerns that animate the partiality debates than the alternative of claiming an unrestricted basic right to be partial to whomsoever we wish. (shrink)

A critical review of Stenius' account of the logic of disjunctive permissions, leading to a proposal for a closely related approach in terms of "checklist conditionals".

According to the permissibility solution to the lottery paradox, the paradox can be solved if we conceive of epistemic justification as a species of permissibility. Clayton Littlejohn has objected that the permissibility solution draws on a sufficient condition for permissible belief that has implausible consequences and that the solution conflicts with our lack of knowledge that a given lottery ticket will lose. The paper defends the permissibility solution against Littlejohn's objections.

Permissivism about rationality is the view that there is sometimes more than one rational response to a given body of evidence. In this paper I discuss the relationship between permissivism, deference to rationality, and peer disagreement. I begin by arguing that—contrary to popular opinion—permissivism supports at least a moderate version of conciliationism. I then formulate a worry for permissivism. I show that, given a plausible principle of rational deference, permissive rationality seems to become unstable and to collapse into unique rationality. (...) I conclude with a formulation of a way out of this problem on behalf of the permissivist. (shrink)

How far can the argument against the Extreme Demand be extended? If living one kind of life, or pursuing one kind of good, is better than the alternatives in a significant enough way to ground requirements of beneficence on others to help me, it cannot be wrong for me to refuse to forgo it to help others. Moreover, there are some kinds of lives, and some kinds of goods, that are morally defensible even when there are alternatives that would be (...) no worse for me. This generates neither an ultra-permissive nor an ultra-ascetic view. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Journal of the History of Ideas 62.3 (2001) 381-399 [Access article in PDF] Permissive Natural Law and Property: Gratian to Kant Brian Tierney In his Doctrine of Right Kant set out to formulate a theory of property that would be based on purely rational argumentation, that would abstract "from all spatial and temporal conditions," and that would be applicable to any person, "merely because and insofar as he is (...) free and has practical reason." But from the time when the work first appeared Kant scholars have found many difficulties in the teaching that he presented. Many of them relate to the idea of permissive natural law that Kant introduced at a key point to his argument.In a previous, complementary article I discussed in detail various apparent aporias that arose in Kant's treatment of this concept and suggested that we might understand his problems better by setting them in a broader historical context than those considered in standard works like those of Reinhard Brandt and Wolfgang Kersting. 1 This is the theme that I want to explore further in the present paper.To sum up briefly some of the difficulties in the Doctrine of Right: A central problem for Kant was to explain how rightful possession of individual property could emerge from a hypothetical state of nature where everything was common to all, where everyone had a right to everything. His argument was grounded on a concept of freedom understood as "a pure rational concept." Kant maintained that every person had an innate right to freedom and from this he deduced a universal law of Right: "[S]o act externally that the free use of your choice can coexist with the freedom of everyone." 2 But the person who first seized for himself what had been common to all evidently did encroach on the freedom of others (their freedom to use the property that had been taken). [End Page 381]To address this problem Kant formulated a "postulate of practical reason" concerning property. Citing the Roman law doctrine of res nullius he argued that external things could in principle be acquired. 3 Then he restated the postulate as a permissive law that obliged others to respect the claim of a first occupant. "This postulate can be called a permissive law (lex permissiva) of practical reason which gives us an authorization... to put all others under an obligation, which they would not otherwise have...." 4 But to put others under an obligation is to encroach on their freedom, which would be a violation of the universal law of Right. For Kant, laws that could be discerned by reason alone without promulgation by a legislator, were understood to be natural laws. 5 The universal law of Right and the permissive law of practical reason were both laws of this kind. It seems therefore that natural law contradicted itself. It prohibited and permitted an action at the same time.Other difficulties arose as the argument proceeded. Kant repeatedly asserted that rightful possession must depend on consent expressed in "a collective general (common) and powerful will," "a will that is united originally and a priori"; 6 but he acknowledged that such a general will would not exist in a state of nature before the institution of civil society and that an act of original acquisition would necessarily proceed from a unilateral will. "But the will that a thing is to be mine... can be only unilateral." 7 And yet Kant also wrote, "By my unilateral choice I cannot bind another to refrain from using a thing, an obligation he would not otherwise have." 8 Kant never did explain how a permissive law, allowing a person to act unilaterally, could impose an obligation on others.In my earlier discussion of Kant's work I indicated that it might be fruitful to approach these difficulties by investigating some previous ways of using the language of permissive natural law, especially as it related to the origin of property rights. There is indeed a whole earlier tradition of thought to be considered. An investigation of this material... (shrink)

This article offers an account of the information condition on morally valid consent in the context of sexual relations. The account is grounded in rights. It holds that a person has a sufficient amount of information to give morally valid consent if, and only if, she has all the information to which she has a claim-right. A person has a claim-right to a piece of information if, and only if, a. it concerns a deal-breaker for her; b. it does not (...) concern something that her partner has a strong interest in protecting from scrutiny, sufficient to generate a privilege-right; c.i. her partner is aware of the information to which her deal-breaker applies; or c.ii. her partner ought to be held responsible for the fact that he is not aware of the information to which her deal-breaker applies; and finally, d. she has not waived or forfeited her claim-right. Although we present this account in the context of sexual relations, we believe a virtue of the account is that it can be easily translated into other contexts. (shrink)

Moral obligation and permissibility are usually thought to be interdefinable. Following the pattern of the duality definitions of necessity and possibility, we have that something’s being permissible could be defined as its not being obligatory to not do it. And that something’s being obligatory could be defined as its not being permissible to not do it. In this paper, I argue that neither direction of this alleged interdefinability works. Roughly, the problem is that a claim that some act is (...) obligatory or permissible entails that there is a moral law, whereas a negative claim that some act is not obligatory or not permissible does not. Nevertheless, one direction of the interdefinability can potentially be salvaged. I argue that, if we do not require the conceptual possibility of moral dilemmas, then there is a way to plausibly define obligation in terms of permissibility. I conclude that permissibility is the only feasible deontic primitive. (shrink)

RésuméÉtant donné un ensemble de données D, les tenants de l'unicité épistémique soutiennent qu'une seule réponse doxastique est rationnelle, tandis que les tenants du permissivisme épistémique soutiennent que plusieurs réponses doxastiques peuvent être rationnelles. Comme certains auteurs l'ont signalé, l'un des attraits de la position permissiviste est qu'elle nous permet de comprendre le désaccord philosophique comme un désaccord dans lequel aucune des parties ne commet de faute rationnelle, et donc de respecter le statut épistémique de chacune d'elles. Je soutiens au (...) contraire que la position permissiviste ne parvient pas à offrir un tel avantage dans de nombreux désaccords philosophiques. (shrink)

ABSTRACTRecent rejections of epistemic consequentialism, like those from Firth, Jenkins, Berker, and Greaves, have argued that consequentialism is committed to objectionable trade-offs and suggest...

Input/output logics are abstract structures designed to represent conditional obligations and goals. In this paper we use them to study conditional permission. This perspective provides a clear separation of the familiar notion of negative permission from the more elusive one of positive permission. Moreover, it reveals that there are at least two kinds of positive permission. Although indistinguishable in the unconditional case, they are quite different in conditional contexts. One of them, which we call static positive permission, guides the citizen (...) and law enforcement authorities in the assessment of specific actions under current norms, and it behaves like a weakened obligation. Another, which we call dynamic positive permission, guides the legislator. It describes the limits on the prohibitions that may be introduced into a code, and under suitable conditions behaves like a strengthened negative permission. (shrink)

Behavioural welfare economics has lately been challenged on account of its use of the satisfaction of true preferences as a normative criterion. The critique contests what is taken to be an implicit assumption in the literature, namely that true preferences are context-independent. This assumption is considered not only unjustified in the behavioural welfare economics literature but unjustifiable – true preferences are argued to be, at least sometimes, context-dependent. This article explores the implications of this ‘critique of the inner rational agent’. (...) I argue that the critique does not support a wholesale shift away from the use of true preferences as an evaluative standard in normative economics; instead, the critique implies that behavioural welfare economists need to inquire into and establish the ‘source’ of particular context-dependent choices in individuals’ decision-making. The source determines the permissibility of correcting individuals’ context-dependent choices and can, in some situations, support decisive welfare judgements. (shrink)

Many philosophers hold that a norm of truth governs the propositional attitude of belief. According to one popular construal of normativity, normativity is prescriptive in nature. The prescriptive norm can be formulated either in terms of obligation or permission: one ought to or may believe that p just in case p is true. It has been argued that the obligation norm is jointly incompatible with the maxim ought implies can and the assumption that there exists some truth that we cannot (...) believe. The problem of the incompatible triad has motivated some to adopt the permissible norm of truth. I argue that the permissible norm faces an analogous problem of the incompatible triad. (shrink)

This brief paper discusses the complexities of permissions.

A rational person doesn’t believe just anything. There are limits on what it is rational to believe. How wide are these limits? That’s the main question that interests me here. But a secondary question immediately arises: What factors impose these limits? A first stab is to say that one’s evidence determines what it is epistemically permissible for one to believe. Many will claim that there are further, non-evidentiary factors relevant to the epistemic rationality of belief. I will be ignoring the (...) details of alternative answers in order to focus on the question of what kind of rational constraints one’s evidence puts on belief. Our main question concerns how far epistemic permission and obligation can come apart.1 Suppose I am epistemically permitted to believe P, i.e., it would not be irrational for me to believe it. Am I thereby obliged to believe P, or are other options rationally available to me?2 Might I be equally rational in remaining agnostic about P, or even believing not-P? Or could even a slightly stronger or weaker degree of confidence be just as reasonable? (shrink)

In his book Moral Dimensions. Permissibility, Meaning, Blame , T.M. Scanlon proposes a new account of permissibility, and argues, against the doctrine of double effect (DDE), that intentions do not matter for permissibility. I argue that Scanlon's account of permissibility as based on what the agent should have known at the time of action does not sufficiently take into account Scanlon's own emphasis on permissibility as a question for the deliberating agent. A proper account of (...) permissibility, based on the agent's actual beliefs, will allow us to revise the principle Scanlon proposes for regulating the use of violence in war, and to show that, while the DDE as such might be invalid, its focus on intentions does point toward an important element which Scanlon's proposal lacks, viz. the requirement that the agent believes that her actions will have certain consequences and can be justified for that reason. (shrink)

Since children are considered incapable ofgiving informed consent to participate inresearch, regulations require that bothparental permission and the assent of thepotential child subject be obtained. Assent andpermission are uniquely bound together, eachserving a different purpose. Parentalpermission protects the child from assumingunreasonable risks. Assent demonstrates respectfor the child and his developing autonomy. Inorder to give meaningful assent, the child mustunderstand that procedures will be performed,voluntarily choose to undergo the procedures,and communicate this choice. Understanding theelements of informed consent has been theparadigm for (...) assessing capacity to give assent.This method leaves the youngest, leastcognitively mature children vulnerable towaiver of assent and forced researchparticipation. Voluntariness can also becompromised by the influence of authorityfigures who can exert undue influence andcoerce children to participate in research. This paper discusses factors that may influencethe decision to give assent/permission,potential parent-child conflict in theassent/permission process and how it isresolved, and potential parental undueinfluence on research participation. Theseissues are illustrated with quotations drawnfrom a larger qualitative study of parentalpermission and child assent (data notpresented). We suggest a developmentalapproach, viewing assent as a continuum rangingfrom mere affirmation in the youngest childrento the equivalent of the informed consentprocess in the mature adolescent. (shrink)

Nominal terms extend first-order terms with binding. They lack some properties of first- and higher-order terms: Terms must be reasoned about in a context of ‘freshness assumptions’; it is not always possible to ‘choose a fresh variable symbol’ for a nominal term; it is not always possible to ‘α-convert a bound variable symbol’ or to ‘quotient by α-equivalence’; the notion of unifier is not based just on substitution.Permissive nominal terms closely resemble nominal terms but they recover these properties, and in (...) particular the ‘always fresh’ and ‘always rename’ properties. In the permissive world, freshness contexts are elided, equality is fixed, and the notion of unifier is based on substitution alone rather than on nominal terms’ notion of unification based on substitution plus extra freshness conditions.We prove that expressivity is not lost moving to the permissive case and provide an injection of nominal terms unification problems and their solutions into permissive nominal terms problems and their solutions.We investigate the relation between permissive nominal unification and higher-order pattern unification. We show how to translate permissive nominal unification problems and solutions in a sound, complete, and optimal manner, in suitable senses which we make formal. (shrink)

Many believe that agent-centred considerations, unlike agent-neutral reasons, cannot show that victims have the right to kill their attackers in self-defence, let alone establish that rescuers have the right to come to their help. In this paper, I argue that the right to kill in self- or other-defence is best supported by a hybrid set of reasons. In particular, agent-centred considerations account for the plausible intuition that victims have a special stake, which other parties lack, in being to thwart the (...) attackers. That special stake plays an important part justifying victims' right to obtain help, and rescuers' right to give it. (shrink)

In complex systems, agents often interact with others in two distinct types of interactions, pairwise interaction and group interaction. The Deffuant–Weisbuch model adopting pairwise interaction and the Hegselmann–Krause model adopting group interaction are the two most widely studied opinion dynamics. In this study, we propose a novel opinion dynamics by combining pairwise and group interactions for agents and study the effects of the combination on consensus in the population. In the model, we introduce a parameter α to (...) control the weights of the two interactions in the dynamics. Through numerical simulations, we find that there exists an optimal α, which can lead to a highest probability of complete consensus and minimum critical bounded confidence for the formation of consensus. Furthermore, we show the effects of α on opinion formation by presenting the observations for opinion clusters. Moreover, we check the robustness of the results on different network structures and find the promotion of opinion consensus by α not limited to a complete graph. (shrink)

In this article I argue that the current readings of permissive law fall into hermeneutical difficulties and do not completely explain Kant’s complex use of the concept. I argue that the shortcomings of these interpretations can only be overcome by relating permissive law to practical teleology. That teleological thinking has a role in Kant’s moral thought by way of history is not new. Here, however, I argue that the system of rights itself is in some manner teleologically situated. This interpretation (...) allows us to understand that Kant’s Doctrine of Right plays the role of a realist utopia. (shrink)

Every model leaves out or distorts some factors that are causally connected to its target phenomenon -- the phenomenon that it seeks to predict or explain. If we want to make predictions, and we want to base decisions on those predictions, what is it safe to omit or to simplify, and what ought a causal model to describe fully and correctly? A schematic answer: the factors that matter are those that make a difference to the target phenomenon. There are several (...) ways to understand differencemaking. This paper advances a view as to which is the most relevant to the forecaster and the decision-maker. It turns out that the right notion of differencemaking for thinking about idealization in prediction is also the right notion for thinking about idealization in explanation; this suggests a carefully circumscribed version of Hempel's famous thesis that there is a symmetry between explanation and prediction. (shrink)

I outline four conditions on permissible promise-making: the promise must be for a morally permissible end, must not be deceptive, must be in good faith, and must involve a realistic assessment of oneself. I then address whether promises that you are uncertain you can keep can meet these four criteria, with a focus on campaign promises as an illustrative example. I argue that uncertain promises can meet the first two criteria, but that whether they can meet the second two depends (...) on the source of the promisor's uncertainty. External uncertainty stemming from outside factors is unproblematic, but internal uncertainty stemming from the promisor's doubts about her own strength leads to promises that are in bad faith or unrealistic. I conclude that campaign promises are often subject to internal uncertainty and are therefore morally impermissible to make, all else being equal. (shrink)