What does the passage of time consist in? There are some suggestive metaphors. âEvents approach us, pass us, and recede from us, like sticks and leaves floating on the river of time.â âWe are moving from the past into the future, like ships sailing into an unknown ocean.â There is surely something right and deep about these metaphors. But how close are they to the literal truth? In this book Bradford Skow argues that they are far from the literal truth. (...) Skowâs argument takes the form of a defense of the block universe theory of time, a theory that, in many ways, treats time as a dimension of reality that closely resembles the three dimensions of space. Opposed to the block universe theory of time are theories that take the metaphors more seriously: presentism, the moving spotlight theory, the growing block theory, and the branching time theory. These are theories of ârobustâ passage of time, or âobjective becoming.â Skow argues that the best of these theories, the block universe theoryâs most worthy opponent, is the moving spotlight theory, the theory that says that âpresentnessâ moves along the series of times from the past into the future. Skow defends the moving spotlight theory against the objection that it is inconsistent, and the objection that it cannot answer the question of how fast time passes. He also defends it against the objection that it is incompatible with Einsteinâs theory of relativity. Skow proposes several ways in which the moving spotlight theory may be made compatible with the theory of relativity. Still, this book is ultimately a defense of the block universe theory, not of the moving spotlight theory. Skow holds that the best arguments against the block universe theory, and for the moving spotlight theory, start from the idea that, somehow, the passage of time is given to us in experience. Skow discusses several different arguments that start from this idea, and argues that they all fail. (shrink)
This book first argues that what philosophers are really after, or at least should be after, when they seek a theory of explanation, is a theory of answers to why-questions. The book's main thesis, then, is a theory of reasons why. Every reason why some event happened is either a cause, or a ground, of that event. Challenging this thesis are many examples philosophers have thought they have found of "non-causal explanations." Reasons Why uses two ideas to show that these (...) examples are not counterexamples to the theory it defends. First is the idea that not every part of a good response to a why-question is part of an answer to that why-question. Second is the idea that not every reason why something is a reason why an event happened is itself a reason why that event happened. (shrink)
Some philosophers believe that the passage of time is a real phenomenon. And some of them find a reason to believe this when they attend to features of their conscious experience. In fact this “argument from experience” is supposed to be one of the main arguments for passage. What exactly does this argument look like? Is it any good?
It is widely believed that shapes are intrinsic properties. But this claim is hard to defend. I survey all known theories of shape properties, and argue that each theory is either incompatible with the claim that shapes are intrinsic, or can be shown to be false.
According to the moving spotlight theory of time, the property of being present moves from earlier times to later times, like a spotlight shone on spacetime by God. In more detail, the theory has three components. First, it is a version of eternalism: all times, past present and future, exist. (Here I use “exist” in its tenseless sense.) Second, it is a version of the A-theory of time: there are nonrelative facts about which times are past, which time is present, (...) and which times are future. That is, it is not just that the year 1066 is past relative to 2007. The year 1066 is also past full-stop, not relative to any other time. (The A-theory is opposed to the B-theory of time, which says that facts about which times are past are relative to other times.) And third, on this view the passage of time is a real phenomenon. Which moment is present keeps changing. As I will sometimes put it, the NOW moves from the past toward the future.1 And this does not mean that relative to different times, different times are present. Even the B-theory can say that 1999 is present relative to 1999 but is not present relative to 2007. No, according to the moving spotlight theory, the claim that which moment is present keeps changing is supposed to be true, even from a perspective outside time. (shrink)
A recent theory of metaphysical indeterminacy says that metaphysical indeterminacy is multiple actuality: there is metaphysical indeterminacy when there are many 'complete precisifications of reality'. But it is possible for there to be metaphysical indeterminacy even when it is impossible to precisify reality completely. The orthodox interpretation of quantum mechanics illustrates this possibility. So this theory of metaphysical indeterminacy is not adequate.
Possible-worlds talk obscures, rather than clariﬁes, the debate about haecceitism. In this paper I distinguish haecceitism and anti-haecceitism from other doctrines that sometimes go under those names. Then I defend the claim that there are no non-tendentious deﬁnitions of ‘haecceitism’ and ‘anti-haecceitism’ using possible-worlds talk. That is, any deﬁnition of ‘haecceitism’ using possible-worlds talk depends, for its correctness, on a substantive theory of the nature of possible worlds. This explains why using possible-worlds talk when discussing haecceitism causes confusion: if the (...) parties to the discussion presuppose different theories of the nature of possible worlds, then they will mean diﬀerent things by ‘haecceitism’. (shrink)
In this paper I distinguish interpretations of the question ``How fast does time pass?’’ that are important for the debate over the reality of objective becoming from interpretations that are not. Then I discuss how one theory that incorporates objective becoming—the moving spotlight theory of time—answers this question. It turns out that there are several ways to formulate the moving spotlight theory of time. One formulation says that time passes but it makes no sense to ask how fast; another formulation (...) says that time passes at one second per supersecond; and a third says that time passes at one second per second. I defend the intelligibility of this final version of the theory. (shrink)
Bradford Skow examines important philosophical questions about causation and explanation. His answers rely on a pair of connected distinctions: the distinction between acting and not acting, and that between situations in which an event happens and when something is in some state.
This paper proposes a new reductive theory of modality, called the moodless theory of modality. This theory, and not modal realism, is the closest modal analogue of the tenseless theory of time. So, if the tenseless theory is true, and the temporality–modality analogy is good, it is the moodless theory that follows. I also argue that the moodless theory, considered on its own, is better than modal realism: arguments often thought to be decisive against modal realism are weak against it.
The paradox of desire is an objection to desire-satisfaction, or preferentist, theories of welfare. In a nutshell, the objection goes like this. I can certainly desire that I be badly oﬀ. But if a desire-satisfaction theory of welfare is true, then—under certain assumptions—the hypothesis that I desire that I be badly oﬀ entails a contradiction. So much the worse for desire-satisfaction theories of welfare.
It is better when people get what they deserve. So we need an axiology according to which the intrinsic value of a possible world is a function of both how well-off and how deserving the people in that world are. But how should these ?desert-adjusted? values of possible worlds be calculated? It is easy to come up with some qualitative ideas. But these qualitative ideas leave us with an embarrassment of riches: too many quantitative functions that implement those qualitative ideas. (...) In this paper I will select one of these quantitative functions and defend its superiority. (shrink)
Sklar () claimed that relationalism about ontology-the doctrine that space and time do not exist-is compatible with Newtonian mechanics. To defend this claim he sketched a relationalist interpretation of Newtonian mechanics. In his interpretation, absolute acceleration is a fundamental, intrinsic property of material bodies; that a body undergoes absolute acceleration does not entail that space and time exist. But Sklar left his proposal as just a sketch; his defense of relationalism succeeds only if the sketch can be filled in. I (...) argue that this cannot be done. There can be no (relationalist) dynamical laws of motion based on Sklar's proposal that capture the content of Newton's theory. So relationalists must look elsewhere for a relationalist interpretation of Newtonian mechanics. (shrink)
I defend the theory that the reasons why some event occurred are its causes. Many “counterexamples” to this theory turn on confusing two levels of reasons. We should distinguish the reasons why an event occurred from the reasons why those reasons are reasons. An example that treats a second-level reason as a first-level reason will look like a counterexample if that second-level reason is not a cause. But second-level reasons need not be first-level reasons.
Argues that there is no interpretation of the commonly-accepted idea that "explanation is that which produces understanding" on which it is of any use for finding what philosophers looking for a theory of explanation have been after. Contains a close examination of a couple of philosophers' attempts to use this idea for that purpose.
There are lots of arguments for, or justifications of, mathematical theorems that make use of principles from physics. Do any of these constitute explanations? On the one hand, physical principles do not seem like they should be explanatorily relevant; on the other, some particular examples of physical justifications do look explanatory. In this article, I defend the idea that physical justifications can and do explain mathematical facts. 1 Physical Arguments for Mathematical Truths2 Preview3 Mathematical Facts4 Purity5 Doubts about Purity: I6 (...) Doubts about Purity: II7 How Physical Arguments Might Explain: I8 How Physical Arguments Might Explain: II9 Conclusion. (shrink)
This paper examples several arguments from Simon Prosser's book Experiencing Time. His argument against the doctrine of the specious present is applauded. His argument that even if time passes, nothing can detect the passage of time, is questioned. Also challenged are his claims that our experience represents things as enduring, rather than perduring, and represents things as having contradictory properties.
It is widely accepted that readers will resist imagining that a character in a story did something morally wrong, even if the story endorses this judgement. This paper argues, first, that readers will not resist if the question of whether that act was wrong is not salient as they read; and, second, that asking a certain question can be part of correctly appreciating a story—even if that question is not in the foreground of the story, and even if the story (...) itself discourages readers from asking it, as is common in some forms of the ‘hermeneutics of suspicion’. (shrink)
No one denies that time and space are diﬀerent; and it is easy to catalog diﬀerences between them. I can point my ﬁnger toward the west, but I can’t point my ﬁnger toward the future. If I choose, I can now move to the left, but I cannot now choose to move toward the past. And (as D. C. Williams points out) for many of us, our attitudes toward time diﬀer from our attitudes toward space. We want to maximize our (...) temporal extent and minimize our spatial extent: we want to live as long as possible but we want to be thin.1 But these diﬀerences are not very deep, and don’t get at the essence of the diﬀerence between time and space. That’s what I want to understand: I want to know what makes time diﬀerent from space. I want to know which diﬀerence is the fundamental diﬀerence between them. (shrink)
This paper develops a moodless theory of modality, intended to be as closely analogous to the tenseless theory of time as possible. It is argued that the new theory is distinct from David Lewis' modal realism and that it solves certain problems better than modal realism does, namely, the problem of advanced modalizing, the problem of necessitism, and the problem of conflict with common opinion.
Bohmian mechanics faces an underdetermination problem: when it comes to solving the measurement problem, alternatives to the Bohmian guidance equation work just as well as the official guidance equation. One way to argue that the guidance equation is superior to its rivals is to use a symmetry argument: of the candidate guidance equations, the official guidance equation is the simplest Galilean-invariant candidate. This symmetry argument---if it worked---would solve the underdetermination problem. But the argument does not work. It fails because it (...) rests on assumptions about how Galilean transformations (especially boosts) act on the wavefunction that are (in this context) unwarranted. My discussion has larger morals about the physical significance of certain mathematical results (like, for example, Wigner's theorem) in non-orthodox interpretations of quantum mechanics. (shrink)
?Those ice cubes melted because by melting total entropy increased and entropy increase has a very high objective chance.? What role does the chance in this explanation play? I argue that it contributes to the explanation by entailing that the melting was almost necessary, and defend the claim that the fact that some event was almost necessary can, in the right circumstances, constitute a causal explanation of that event.
Focused correlation compares the degree of association within an evidence set to the degree of association in that evidence set given that some hypothesis is true. Wheeler and Scheines have shown that a difference in incremental confirmation of two evidence sets is robustly tracked by a difference in their focus correlation. In this essay, we generalize that tracking result by allowing for evidence having unequal relevance to the hypothesis. Our result is robust as well, and we retain conditions for bidirectional (...) tracking between incremental confirmation measures and focused correlation. (shrink)
‘Those ice cubes melted because by melting total entropy increased and entropy increase has a very high objective chance.’ What role does the chance in this explanation play? I argue that it contributes to the explanation by entailing that the melting was almost necessary, and defend the claim that the fact that some event was almost necessary can, in the right circumstances, constitute a causal explanation of that event.
A desert-sensitive moral theory says that whether people get what they deserve, whether they are treated as they deserve to be treated, plays a role in determining what we ought to do. Some popular forms of consequentialism are desert-sensitive. But where do facts about what people deserve come from? If someone deserves a raise, or a kiss, in virtue of what does he deserve those things? One plausible answer is that what someone deserves depends, at least in part, on how (...) well he meets his moral requirements. The wicked deserve to suffer and the decent do not. Shelly Kagan (2006) has argued that this plausible answer is wrong. But his argument for that conclusion does not succeed. I will show how to formulate a desert-sensitive moral theory (and also a desert-sensitive version of consequentialism) on which this answer is correct. (shrink)
In lieu of an abstract, here is a brief excerpt of the content:Groll on Bionormativity and the Value of Genetic KnowledgeBradford Skow (bio)1. IntroductionShould people who plan to use donated sperm and/or eggs to conceive a child use an open donor who agrees ahead of time that any resulting children may be told who the donor is? In Conceiving People: Genetic Knowledge and the Ethics of Sperm and Egg Donation (Groll 2021), Daniel Groll answers yes. He argues that using an (...) anonymous donor would be wrong. Groll does not discuss adoption in detail, but his ideas also support the claim that people who adopt a child should adopt from parents who agree ahead of time that their child may be told who their biological parents are. It is not OK to have a closed adoption, in which information about the child's biological parents that would otherwise be public (for example, information on their original birth certificate) is kept secret by the government, and where (in some cases) the biological parents are promised that their children will never learn who they are. I was adopted in a closed adoption and met my biological family when I was twenty, and I think Groll's answer to his main question is right. That, however, does not mean I agree with all of his reasons. Here I examine those reasons and sketch some places where I would depart from them.2. The argument in outlineThe basic outline of Groll's argument, in simple terms, is as follows.1. If a child's knowing who their genetic parents are will likely benefit them—that is, if it will make their life go better, or increase their wellbeing—and if this is foreseeable, then that is a reason for parents to make the child's learning this possible (at some "appropriate" time).2. That knowledge will likely benefit the child …3.. … and this is foreseeable. [End Page 182]4. This reason favoring parents making genetic knowledge possible is strong enough that, except in maybe very special circumstances, parents should make this knowledge possible.The first point is hard to dispute. If the second point is true, then the third point is also plausible, since it is foreseeable that a child born from gamete donation (or an adopted child) will likely try to learn who their genetic (or biological) parents are. These searches are common and widely known to occur. Most of the action, therefore, is in the second point. Why think that knowing who your genetic or biological parents are is likely to make your life go better? Here the path diverges into a wood.3. First try: getting what you want makes your life go betterThe simplest way to argue that knowing who your genetic parents are is a benefit is to note that many, if not most, people conceived through gamete donation (or adoption) will, at some point, want—intensely want—to know who their genetic (or biological) parents are. One can then appeal to the idea that getting what you want makes your life go better, other things being equal.1Groll does not like this justification. His objection is that it does not show "that there is anything resembling a deep connection between genetic knowledge and well-being" (Groll 2021, 65). On Groll's view, knowing who your genetic (biological) parents are is a benefit, but this is not simply because it is something you want to know. I might know ahead of time that my child will want to live in a red house, and they might therefore be better off if they get to, and I might do my best to make that possible; but the reason I have to make genetic knowledge available to them is much stronger and much weightier than my reason to help them live in the right colored house. (It may be that this is where the fourth point of the argument, about the strength of reasons, comes in.)So why is the reason to provide genetic knowledge stronger? Groll, I think, holds that some things are more worth wanting than others. Getting what you want may benefit you, but getting what you want when what you want is something... (shrink)
Is there anything more to temperature than the ordering of things from colder to hotter? Are there also facts, for example, about how much hotter (twice as hot, three times as hot...) one thing is than another? There certainly are---but the only strong justification for this claim comes from statistical mechanics. What we knew about temperature before the advent of statistical mechanics (what we knew about it from thermodynamics) provided only weak reasons to believe it.
When distinguishing absolute, true, and mathematical time from relative, apparent, and common time, Newton wrote: “absolute, true, and mathematical time, in and of itself and of its own nature, without reference to anything external, ﬂows uniformly” [Newton 2004b: 64]. Newton thought that the temporal metric is intrinsic. Many philosophers have argued—for empiricist reasons or otherwise—that Newton was wrong about the nature of time. They think that the ﬂow of time does involve “reference to something external.” They think that the temporal (...) metric is extrinsic. Among others, Mach, Poincaré, and Grünbaum seem to accept this view.1 And these are not the only two views available. Perhaps both Newton and his opponents are wrong and there is no temporal metric at all. (shrink)
Sometimes, a proposition is fictional in a story in virtue of the fact that other fictional truths are good evidence for it. Cases are presented in which this evidential rule, and not some rule that invokes counterfactuals or intentions, is what explains what is fictional. Applications are made to the question of interpretive pluralism and the problem of imaginative resistance. In the background is pluralism about fictionality: the evidential rule is one of a variety of rules that are needed to (...) account for what is fictional in a story. (shrink)
Is double prevention causation? Some say yes and some say no, but the answer is yes and no. Interrupting double prevention, where A prevents B from continuing to prevent something, is causation, while blocking double prevention, where A intervenes before B has begun preventing anything, is not. I present two arguments for this thesis. First, it sorts canonical examples of double prevention correctly. Second, well-known theoretical arguments that double prevention is not causation only show that blocking double prevention is not (...) causation. (shrink)
Earman and Roberts (2005) argue that a standard deﬁnition of “empiricism about laws of nature” is inadequate, and propose an alternative deﬁnition they think is better. But their argument against the standard deﬁnition fails, and their alternative is defective.
Maybe there is something rather than nothing because the nothingness force acted on itself, and when the nothing nothings itself it produces something. Robert Nozick suggested this as a candidate explanation of the fact that there is something rather than nothing. If he is right that it is a candidate explanation, we should pay attention: there are not many candidates out there. But his "explanation" looks, instead, like a paradigm case of philosophical nonsense. In this paper I describe a "metaphysical (...) dynamics" that makes sense out of Nozick's apparent nonsense. (shrink)
Bohmian mechanics faces an underdetermination problem: when it comes to solving the measurement problem, alternatives to the Bohmian guidance equa- tion work just as well as the official guidance equation. Dürr, Goldstein, and Zanghì have argued that of the candidate guidance equations, the official guid- ance equation is the simplest Galilean-invariant candidate. This symmetry argument—if it worked—would solve the underdetermination problem. But the argument does not work. It fails because it rests on assumptions about how Galilean transformations act on the (...) wavefunction that are unwarranted. My discussion has larger morals about the phys- ical significance of certain mathematical results in non-orthodox interpretations of quantum mechanics. (shrink)
Local versions of the (special) principle of relativity say that if the same type of experiment is conducted in two isolated, unaccelerated laboratories, then the outcomes of those experiments must be the same. Global versions of the principle say that if you take a physically possible world and boost the entire material content of that world, you get another physically possible world. Some authors say that the local and the global principles are logically independent, and that the local version is (...) more important. These authors are wrong. I argue that the global version entails the local version, and discuss why a counterexample to this entailment offered by Tim Budden fails. (shrink)