THIS PAPER PRESENTS THE SEMANTIC THEORY FOR A TEMPORAL-MODAL LOGIC WITH RIGIDLY REFERENTIAL TEMPORAL OPERATORS ('dtomorrow' AND 'dnow') IN WHICH THE 'TRADITIONAL' INDETERMINIST INTERPRETATION OF ARISTOTLE'S _DE INTERPRETATIONE 9 CAN BE MODELED. THIS LOGIC HAS, I BELIEVE, SOME INTRINSIC PHILOSOPHICAL INTEREST AND PLAUSIBILITY. HOWEVER, THE PRESENT PAPER IS PRINCIPALLY DEVOTED TO AN INITIAL EXAMINATION OF THE RELATION BETWEEN THE LOGIC AND SUCH TOPICS IN THE ANCIENT PHILOSOPHY OF THE TIME AND OF THE MODALITIES AS THE NECESSITY OF THE PAST, ABSOLUTE (...) VERSUS TEMPORALLY RELATIVE ALETHIC MODALITIES, THE 'PLENITUDE' PRINCIPLE AND UNACTUALIZED POSSIBILITIES, AND THE CYCLICAL NATURE OF TIME. (shrink)

It is a commonsense thesis that unactualized possibilities are not parts of actuality. To keep his modal realism in line with this thesis, David Lewis employed his indexical account of the term “actual.” I argue that the addition of counterpart theory to Lewis’s modal realism undermines his strategy for respecting the commonsense thesis. The case made here also reveals a problem for Lewis’s attempt to avoid haecceitism.

Chapter 7 explores the question: Are there or could there be, possible but non‐existent objects? In the first half of the chapter, I critically assess the claim that an applied semantics for modal logic commits us to the claim that there are non‐existent possible objects. I conclude that it does commit us to there being some possible world distinct from the actual world that contains some object distinct from anything that exists in the actual world; but it does not, however, (...) commit us to the claim that there really are some things that do not exist. In the second half of the chapter, I develop a historically based argument for the conclusion that there are non‐existent possible objects, which I call the Classical Argument. Importantly, the Classical Argument presupposes that singular negative existentials are possible. I end the chapter by showing that certain objections to the possibility of singular negative existentials fail, and that such existentials are indeed possible. (shrink)

Chapter 7 concluded with the claim that the Classical Argument for possible non‐existent objects depends on both the possibility of singular negative existentials and the Ontological Principle. The Ontological Principle is the principle that any world in which a singular proposition is true is one in which there is such a thing as its subject, or in which its subject has being if not existence. In this chapter, I show that the Ontological Principle is false and that whatever plausibility it (...) enjoys is explained by the truth of a similar principle, namely, the Restricted Ontological Principle. Thus, the Classical Argument fails. Moreover, I give an account of how fictional names function in order to show that statements about fictional subjects, for example, ‘Othello is a Moor’, do not express predicative singular propositions. (shrink)

This paper analyzes the notion of possibility in biology and demonstrates how synthetic biology can provide understanding on the modal dimension of biological systems. Among modal concepts, biological possibility has received surprisingly little explicit treatment in the philosophy of science. The aim of this paper is to argue for the importance of the notion of biological possibility by showing how it provides both a philosophically and biologically fruitful category as well as introducing a new practically grounded way for its assessment. (...) More precisely, we argue that synthetic biology can provide tools to scientifically anchor reasoning about biological possibilities. Two prominent strategies for this are identified and analyzed: the design of functionally new-to-nature systems and the redesign of naturally occurring systems and their parts. These approaches allow synthetic biologists to explore systems that are not normally evolutionarily accessible and draw modal inferences that extend in scope beyond their token realizations. Subsequently, these results in synthetic biology can also be relevant for discussions on evolutionary contingency, providing new methods and insight to the study of various sources of unactualized possibilities in biology. (shrink)

On Jaakko Hintikka’s understanding of Aristotle’s modal thought, Aristotle is committed to a version of the Principle of Plenitude, which is the thesis that no genuine possibility will go unactualized in an infinity of time. If in fact Aristotle endorses the Principle of Plenitude, everything becomes necessary. Despite the strong evidence that Aristotle indeed accepts that Principle of Plenitude, there are key texts in which Aristotle seems to contradict it. On Hintikka’s final word on the matter, Aristotle either endorses (...) the Principle of Plenitude or Aristotle is simply inconsistent. Without challenging Hintikka’s interpretation of the relevant texts, I show how Aristotle may accept a form of the Principle of Plenitude that allows for genuine unactualized possibilities in the world. What allows me to reconcile the seemingly inconsistent data is to show how Aristotle is only committed to a de re version of the Principle of Plenitude. After I lay out my proposal, I show how it opens up new ways in which we might understand Aristotle’s attempt to reject fatalism in his De interpretatione 9. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Journal of the History of Philosophy 39.1 (2001) 23-47 [Access article in PDF] Suárez' Doctrine of Eternal Truths Amy D. Karofsky 1. Introduction The primary aim of this paper is to offer an interpretation of Suárez' doctrine of eternal truths as found in Metaphysical Disputation XXXI, chapter XII, sections 38-47. There, following the typical scholastic style, Suárez considers and rejects several theories before developing his own. Because it is (...) somewhat difficult to determine what view Suárez ultimately adopts, interpretations of this passage tend to vary. For example, Norman Wells suggests that the necessity and eternality of essential propositions is grounded in the intellect of the divine being. 1 Armand Maurer and John P. Doyle maintain that eternal truths are not grounded in the being of God, but rather in the real being of the essences themselves. 2 I will argue that none of these interpretations adequately expresses Suárez' project, for Suárez wants a solution to the problem of eternal truths that does not depend upon the will of the divine being and one that avoids any ontological commitment to unactualized, possible essences. 3 2. Explanation of the Problem of Eternal Truths Suárez begins the thirty-first disputation with a proof of the identity of essence and existence in finite creatures. The key premise in his argument is the claim that, lacking existence, an unactualized essence is not a being, but absolutely [End Page 23] nothing. 4 By 'being' Suárez means existing being, or a being that is created by God. 5 Unlike the essence of God, the essence of a creature is dependent for its being on the efficient causality of God. Prior to the creative act of God, then, the essence of a creature is not an existing being, hence not a being at all; the unactualized, possible essence is a non-being or nothing.From the claim that a nonexistent essence is absolutely nothing, the following problem arises:... si, ablata existentia, perit essentia, ergo propositiones illae in quibus praedicata essentialia de re praedicantur, non sunt necessariae, neque perpetuae veritatis... 6An essential proposition of the form "X is f" is a proposition in which an essential property f is attributed to an object X. If there are no X's in existence, then there is nothing of which f can be predicated. It would seem, then, that the proposition, "X is f" must be false. One might maintain, however, that even though there are no X's in existence, there is an essence (of) X that has the property f. And in this way, "X is f" remains true, even if there are no X's in existence.However, if one holds, as Suárez does, that the unactualized essence is absolutely nothing, then this solution will not work. For if there are no X's in existence, and if a nonexistent essence is absolutely nothing, then there is nothing of which the essential attribute can be predicated. Thus it appears that any proposition that purports to attribute a property to a nonexistent object must be false and so clearly it can be neither necessarily nor eternally true. Therefore, because Suárez believes that an unactualized essence is absolutely nothing, he seems to be committed to the claim that essential propositions are neither necessarily, nor eternally, true. I will refer to this problem as the Problem of Eternal Truths.Another way to illustrate the Problem of Eternal Truths is to see that there are two seemingly inconsistent propositions: AN: An unactualized, possible essence is absolutely nothing, and NE: True essential propositions are necessarily and eternally true. [End Page 24]Given that a proposition in which a property is attributed to an unactualized essence is false, if Suárez wants to assert the truth of AN, it would appear that he must deny the truth of NE, and, in so doing, reject the possibility of any science of creatures that deals only with necessary truths.Suárez considers three different solutions to this problem: (What I will call) the Aristotelian Solution, the Divine... (shrink)

The enactivist account of consciousness posits that motivated activation of sensorimotor action imagery anticipates possible action affordances of environmental situations, resulting in representation of the environment with a conscious “feel” associated with the valences motivating the anticipations. This approach makes the mind–body problem and the problem of mental causation easier to resolve, and offers promise for understanding how consciousness results from natural processes. Given a process-oriented understanding of the way many systems in non-conscious nature are “proto-motivated” toward realizing unactualized (...) possibilities, and can use symbolic objects to “proto-represent” unactualized possibilities, it becomes more clear how self-organizing systems can subserve subjective consciousness. If a system executes, in a unified way, both a proto-desire and a proto-representation of the same unactualized possibility — in order to provide a kind of causal power for the unactualized possibility — then the result is the familiar experience of phenomenal consciousness. (shrink)

A Master-like argument, in the usage of the present paper, is an argument that employs a reductio ad impossibile principle to transmit the necessity of what are or become past truths to the remainder of time by means of necessary conditionals of some sort. The conclusion of such an argument is some no-unactualized-possibilities principle. This paper argues that the formulation of a Master-like argument by A. N. Prior in a mixed modal temporal propositional logic introduces certain artifacts into (...) the logical analysis of the argument. One of these, a principle of temporal discreteness, is not essential to a Master-like argument. Another, a principle of forwards temporal linearity, is technically essential; but it is usually tacitly presupposed by the necessary temporal conditionals employed to 'tie together' past and future time in less formal accounts of Master-like arguments. (shrink)

This book, one of the first full-length studies of the modalities to emerge from the debate to which Saul Kripke, David Lewis, Ruth Marcus, and others are contributing, is an exploration and defense of the notion of modality de re, the idea that objects have both essential and accidental properties. Plantinga develops his argument by means of the notion of possible worlds and ranges over such key problems as the nature of essence, transworld identity, negative existential propositions, and the existence (...) of unactual objects in other possible worlds. He also applies his logical theories to the elucidation of two problems in the philosophy of religion: the problem of evil and the ontological argument. (shrink)

Several philosophers have recently suggested that truths about unactualized metaphysical possibilities are true in virtue of the existence of actual objects and their dispositional properties. For example, on this view, it is true that unicorns are metaphysically possible only if some actual object has (or had) the disposition to bring it about that there are unicorns. This view, a dispositionalist version of what has recently been dubbed “The New Actualism,” is a proposal about the nature of modal truthmakers. (...) But, I will argue, this proposal entails much more than that. Here, I will demonstrate that, if the modal truthmakers are the dispositional properties of actual objects, then either (i) there exists one or more causally potent necessary beings, or (ii) necessarily, there exists an actually infinite number of contingent beings. (shrink)

Critics of multiple realizability have recently argued that we should concentrate solely on actual here-and-now realizations that are found in nature. The possibility of alternative, but unactualized, realizations is regarded as uninteresting because it is taken to be a question of pure logic or an unverifiable scenario of science fiction. However, in the biological context only a contingent set of realizations is actualized. Drawing on recent work on the theory of neutral biological spaces, the paper shows that we can (...) have ways of assessing the modal dimension of multiple realizability that do not have to rely on mere conceivability. (shrink)

In this paper I shall address two main questions, namely: (1) Is Frege’s criticism against psychologism still relevant to the present debate on naturalism vs. anti-naturalism? And (2) Does Frege’s suggested alternative to reductive naturalism amount to a variety of supernaturalism? After having provided an answer to the above mentioned questions (a positive and a negative one respectively), I shall consider three possible non-Platonist proposals as regards the metaphysics of what Frege called the “unactual-objective realm”: (i) irrealism, (ii) objectivity without (...) objects and (iii) objectuality without substantiality. I shall claim that, even though they all succeed in avoiding both Platonism and supernaturalism, it is the third that best fits Frege’s insight concerning the root of the reductive naturalist’s mistake. (shrink)

In this paper I shall address two main questions, namely: (1) Is Frege’s criticism against psychologism still relevant to the present debate on naturalism vs. anti-naturalism? And (2) Does Frege’s suggested alternative to reductive naturalism amount to a variety of supernaturalism? After having provided an answer to the above mentioned questions (a positive and a negative one respectively), I shall consider three possible non-Platonist proposals as regards the metaphysics of what Frege called the “unactual-objective realm”: (i) irrealism, (ii) objectivity without (...) objects and (iii) objectuality without substantiality. I shall claim that, even though they all succeed in avoiding both Platonism and supernaturalism, it is the third that best fits Frege’s insight concerning the root of the reductive naturalist’s mistake. (shrink)

A new theory of identity statements is put forward which appeals to a basic distinction between two notions of identity, i.e. strict and loose identity. The former is the traditional necessary relation of an object with the object itself, whereas the latter is a contingent relation of reduction of some (at least two) possible unactual objects to a possible actual object. By appealing to strict identity, one can maintain that some tokenings of identity sentences express a semantic content which is (...) both knowable apriori only and a necessary proposition. By appealing to loose identity instead, one can maintain that other tokenings of identity sentences express a semantic content which is both knowable a posteriori only and a contingent proposition. (shrink)

One of the most vexing problems in the philosophy of religion is the existence of moral evil in light of an omnipotent and wholly good deity. A popular mode of diffusing the argument from evil lies in the appeal to free will. Traditionally it is argued that there is a strong connection, even a necessary one, between the ability to exercise free will and the occurrence of wrong-doing. Transworld depravity, as characterized by Alvin Plantinga, is a concept which has gone (...) far to explain this relationship. Essentially, the notion of transworld depravity involves the claim that in any world where a person is significantly free that person would, on some occasion, act morally wrongly, or as Plantinga phrases it: ‘If S' were actual, P would go wrong with respect to A’ (where S' is a possible world, P is a person and A is an action). Not only, Plantinga claims, is it possible that there are persons who suffer from transworld depravity, but ‘it is possible that everybody suffers from it’. If transworld depravity obtains, Plantinga notes, God ‘might have been able to create worlds in which moral evil is very considerably outweighed by moral good; but it was not within His power to create worlds containing moral good but no moral evil – and this despite the fact that He is omnipotent’. On this view, God could not instantiate perfect-person essences who would not ever sin. Although Plantinga argues that these instantiated beings are significantly free in that they could have done otherwise (i.e. not sinned), it does seem that his claim about transworld depravity amounts to a claim about transworld depravity amounts to a claim about the existence of a necessary connection obtaining between freedom and evil. For even though it makes sense to claim that an individual may have unactualized dispositions, to claim that everyone, past, present and future, has unactualized dispositions seems to be a significantly different claim. It is therefore difficult to see how this latter claim differs in substance from the claim of a necessary connection obtaining between the capacity for free will and the commission of evil acts. (shrink)

This is a fresh and stimulating analysis of the esthetic experience in terms of the import it gives to the role of "affective hazard" in the constitution of the esthetic form. The author, who comes with a background in English literature, proposes that all esthetic experiences have one common feature, their form as felt unity which endows the object with a value that distinguishes it from other objects. The experiencer as one of the terms of the relationship is confronted with (...) a manifold of elements one of which stands out in a hazardous way as an impediment to the union of the terms. Its very hazardousness, however, impregnates the whole structure, and in spite of an apparent obstruction to the order it actually bestows a balance and symmetry that would otherwise be lacking. There is a bending, but no breaking; the fragility itself is a necessary precondition for the form that constitutes the esthetic experience marking the object as a potentiality for some form yet unactualized but implicitly determined. The scholastic notion of being is evident in Slattery’s analysis of form as the principle of "unity," "intelligibility," and "determination." Rather than emphasize the static quality of things she chooses to focus on the object as both open and closed; open to receive many forms but closed in that it is only actualized as one form by a mind who at will chooses it from a manifold of other possible forms which it rejects. Unlike the Aristotelian form which inheres in the thing independent of the experiencer the form in the esthetic object is constituted by an experiencer who is an active participant in the relationship. This active term also confers upon the object its value which defines it as an object of esthetic quality. Interspersed throughout the book are descriptive analyses of various esthetic forms that illustrate what Slattery means by the decisive role of "affective hazard," and it is here that she is at her best. So well does she capture the essence of the dynamic richness peculiar to the esthetic object that she evokes in the reader an affective excitement and an awareness of a felt unity. This in itself verifies her thesis, and we could only have wished that she furnished us with more of the heightening experiences.—K. R. M. (shrink)

The book also sheds new light on the nature of metaphysical theorizing by exploring the interaction of semantic and metaphysical issues, the connections between different metaphysical issues, and the nature of ontological commitment.

It is widely assumed that sense perception cannot deliver knowledge of nonactual (metaphysical) possibilities. We are not supposed to be able to know that a proposition p is necessary or that p is possible (if p is false) by sense perception. This paper aims to establish that the role of sense perception is not so limited. It argues that we can know lots of modal facts by perception. While the most straightforward examples concern possibility and contingency, others concern necessity (...) and impossibility. The possibility of a perceptual route to some modal knowledge is not as radical as it may at first sound. On the contrary, acknowledging it has benefits. (shrink)

Epistemic possibilities are relative to bodies of information, or perspectives. To claim that something is epistemically possible is typically to claim that it is possible relative one’s own current perspective. We generally do this by using bare, unqualified epistemic possibility (EP) sentences, ones that don’t mention our perspective. The fact that epistemic possibilities are relative to perspectives suggests that these bare EP sentences fall short of fully expressing propositions, contrary to what both contextualists and relativists take for granted. (...) Although they rightly reject propositional invariantism, the implausible view that a bare EP sentence expresses the same classical (absolutely true or absolutely false) proposition in any context, they maintain that a change in perspective shifts either the sentence’s propositional content (to a proposition involving a different perspective) or its truth-value (the same perspectivally neutral proposition now evaluated from a different perspective). I deny that the semantic contents of bare EP sentences shift at all. But I also deny that these contents have truth-values. Rather, according to the radical invariantism I defend, these contents are not full-fledged propositions but merely propositional radicals. Only explicitly relativized EP sentences manage fully to express propositions, and these perspective-involving propositions are the only EP propositions there are. Nevertheless, bare EP sentences are perfectly capable of being used to assert EP propositions, because utterances of them implicitly allude to the relevant perspective. Various problem cases challenge radical invariantism to explain pragmatically which perspective is read into the utterance of a given bare EP sentence. Unlike contextualism and relativism, it can do this without having to resort to any semantic bells and whistles.. (shrink)

This essay challenges the widely accepted principle that a person is morally responsible for what he has done only if he could have done otherwise. The author considers situations in which there are sufficient conditions for a certain choice or action to be performed by someone, So that it is impossible for the person to choose or to do otherwise, But in which these conditions do not in any way bring it about that the person chooses or acts as he (...) does. In such situations the person may well be morally responsible for what he chooses or does despite his inability to choose or to do otherwise. Finally the author considers certain suggestions for revising the principle he rejects or for replacing it with a principle of an altogether different kind. (shrink)

Drawing upon the life and work of S. Kay Toombs, I explore the impact and import of phenomenological accounts of disability for the existentialist tradition. Through the case of multiple sclerosis, a noncongenital, late-onset, and degenerative disability, I show how the general structures that emerge from its lived experience largely support a mere-difference view of disability and highlight the need for an equitably habitable world. I further argue that phenomenological accounts of disability demonstrate accessibility to be the defining feature of (...) what it means to be embodied as we are. I conclude with a discussion of the more general philosophical relationship between disability, embodiment, and existentialism. (shrink)

This paper provides a critique and re-evaluation of the way that ethics is understood and promoted within mainstream Human Resource Management (HRM) discourse. We argue that the ethics located within this discourse focuses on bolstering the relevance of HRM as a key contributor to organizational strategy, enhancing an organization's sense of moral legitimacy and augmenting organizational control over employee behaviour and subjectivity. We question this discourse in that it subordinates the ethics of the employment relationship to managerial prerogative. In response, (...) we suggest a different model of the relationship between ethics and HRM—one that finds the possibility of ethics in the contestation and destabilization of HRM. Such ethics arises through resistance to moral normalization and the constraint of freedom and difference. The contribution of our paper is in theorising the possibilities of a relationship between ethics and HRM that does not place HRM at its centre, as chief intermediary of the ethics of the employment relationship, but rather sees HRM as being a powerful player in a set of what Mouffe calls 'agonistic' socio-ethical relations. (shrink)

Many philosophers think that free will requires alternative possibilities. Other philosophers deny this. There are plenty of philosophical arguments on both sides of this debate, but here I want to highlight various theological pressures that might push Christians into rejecting the principle of alternative possibilities. In this paper, I explore six cases that might push Christians in that direction: the case of divine foreknowledge, the case of prophecy, the case of the blessed in heaven, the case of Christ's (...) human freedom, the case of Mary's fiat in light of her immaculate conception, and the case of prayers for the past. As I will argue, in each of these cases, given certain other standard theological commitments, it seems that Christians are pushed to admit that the agent in question does indeed act freely but also that he or she did not possess alternative possibilities at the moment of decision. (shrink)

Cover -- Half Title -- Title Page -- Copyright Page -- Table of Contents -- List of Contributors -- Preface -- Foreword -- Introduction -- Chapter 1 Alternate Possibilities and Moral Responsibility -- Chapter 2 Responsibility and Alternative Possibilities -- Chapter 3 Blameworthiness and Frankfurt's Argument Against the Principle of Alternative Possibilities -- Chapter 4 In Defense of the Principle of Alternative Possibilities: Why I Don't Find Frankfurt's Argument Convincing -- Chapter 5 Responsibility, Indeterminism and Frankfurt-style (...) Cases: A Reply to Mele and Robb -- Chapter 6 Classical Compatibilism: Not Dead Yet -- Chapter 7 Bbs, Magnets and Seesaws: The Metaphysics of Frankfurt-style Cases -- Chapter 8 Moral Responsibility without Alternative Possibilities -- Chapter 9 Freedom, Foreknowledge and Frankfurt -- Chapter 10 Source Incompatibilism and Alternative Possibilities -- Chapter 11 Robustness, Control, and the Demand for Morally Significant Alternatives: Frankfurt Examples with Oodles and Oodles of Alternatives -- Chapter 12 Alternate Possibilities and Reid's Theory of Agent-causation -- Chapter 13 Responsibility and Agent-causation -- Chapter 14 Soft Libertarianism and Flickers of Freedom -- Chapter 15 'Ought' Implies 'Can', Blameworthiness, and the Principle of Alternate Possibilities -- Chapter 16 The Moral Significance of Alternate Possibilities -- Chapter 17 The Selling of Joseph - A Frankfurtian Interpretation -- Chapter 18 Some Thoughts Concerning PAP -- Bibliography -- Index. (shrink)

This paper is a critical comment on an article of David Widerker which also appeared in the Journal of Philosophy. In this article, Wideker held, against positions previously defended by him, that in was possible to design effective counterexamples, in the line initiated by Harry Frankfurt in 1969, to the so-called “Principle of Alternative Possibilities”. The core of my criticism of Widerker is to deny that agents, in his putative counterexamples, are morally responsible for their decisions, owing to the (...) fact they are not able to respond appropriately to moral reasons. (shrink)

In recent years, a surge of interest came up with studies in terms of the influence of different types of meditation on the brain and body. Lacking the basic understanding as to why ancient cultures conceived this practice primarily in its various facets, most of these studies mainly focus on delineating the underlying mechanisms of influence in terms of wellbeing and the cognitive enhancement. Thus, they not only involve various definitional and taxonomical issues, but also methodological issues. In this concern, (...) here, we share a new perspective and also emphasize on few issues which are fundamental to meditation research that should be addressed in future studies. (shrink)

The concept of consensus is often appealed to in discussions of biomedical ethics and applied ethics, and it plays an important role in many influential ethical theories. Consensus is an especially influential notion among theorists who reject ethical realism and who frame ethics as a practice of discourse rather than a body of objective knowledge. It is also a practically important notion when moral decision making is subject to bureaucratic organization and oversight, as is increasingly becoming the case in medicine. (...) Two models of consensus are examined and criticized: pluralistic consensus and overlapping consensus. As an alternative to these models, the paper argues that consensus refers to the dialogic aspects of a broader normative conception of democratic moral agency. When the preconditions for that dialogic democratic practice are met, consensus has a justificatory role in ethics; when they are not, consensus, as distinct from mere agreement, does not emerge and can have no moral authority. Keywords: applied ethics, bioethics, consensus, contract theory, democracy, discourse ethics, liberalism CiteULike Connotea Del.icio.us What's this? (shrink)

Ehring, D. 1997. Causation and Persistence. New York: Oxford University Press. Fair, D. 1979. Causation and the flow of energy. Erkenntnis 14: 219–50. Goldman, A. 1977. Perceptual objects. Synthese 35: 257–84. Lewis, D. 1986a. Causation. In Philosophical Papers Vol. 2, 159–213. New York.

It has recently been argued that the principle that "ought" implies "can" entails the principle that moral responsibility requires alternate possibilities, and hence that the acceptance of the former principle requires acceptance of the latter. This paper disputes the alleged entailment and gives reasons for accepting the former principle while rejecting the latter.

I present and develop the view that omissions are de re possibilities of actual events. Omissions do not literally fail to occur; rather, they possibly occur. An omission is a tripartite metaphysical entity composed of an actual event, a possible event, and a contextually specified counterpart relation between them. This view resolves ontological, causal, and semantic puzzles about omissions, and also accounts for important data about moral responsibility for outcomes resulting from omissions.