Laws of Nature

The article discusses the position of the Australian philosopher David Armstrong on the problem of the ontological status of the laws of nature. Through a clarification of Armstrong’s understanding of naturalism, physicalism, and factualism, the general essence of his metaphysical project is summarized. Then article presents his theory of the laws of nature, which is a kind of nomological realism: his version of the nomolog­ical argument is examined; his general grounds for rejecting the regularity theories, which is classical for the (...) naturalistic approach, are clarified; and the role of abduction in Arm­strong’s theory is demonstrated. The relation of nomic necessity, which is the key concept of his theory, is discussed in detail: its status as a second-order universal is explained; the terms of this relation, namely the types of states of affairs that constitute some special kind of universals, are distinguished; the essence of the nomic connection assumed by this relation is clarified through Armstrong’s theory of causality. Armstrong’s critique of regularity theories of laws of nature and the advantages of his nomological realism over them are discussed: cases where regularity is not law are considered; cases where there are laws that are not related to regularities, and cases where law and regularity seem to coincide, but there is reason to believe that they are different, these are the cases that appear to be most important. Finally, drawing on his own argumentation, the advan­tages of Armstrong’s theory over the best systems approach are justified: the problem of subjectivism and the threat of anti-realism inherent in coherentist approaches are ex­amined; the highly counterintuitive dependence of the existence of some laws on the ex­istence of others is pointed out; and the danger of actual contradictions within our ontol­ogy is demonstrated. (shrink)

In his Zur Einstein’schen Relativitätstheorie, Ernst Cassirer presents relativity theory as the last manifestation of the tradition of the “physics of principles” that, starting from the nineteenth century, has progressively prevailed over that of the “physics of models.” In particular, according to Cassirer, the relativity principle plays a role similar to the energy principle in previous physics. In this article, I argue that this comparison represents the core of Cassirer’s neo-Kantian interpretation of relativity. Cassirer pointed out that before and after (...) Kant, the history of physics presents significant instances in which the search for formal conditions that the laws of nature must satisfy preceded and made possible the direct search for such laws. In his earlier years, Cassirer seems to have regarded principles like the energy principle, the relativity principle, and the principle of least action as a constitutive but provisional form of a priori, imposing specific limitations on the form of the allowable laws of nature. Only in his later years, by attributing an autonomous status to these statements of principle, did Cassirer attribute a definitive but merely regulative meaning to the a priori. This does not impose specific requirements on natural laws but only a motivation to search for them. (shrink)

This chapter contains sections titled: Foundations of mathematics Belief and truth Reasonable belief, probability, and knowledge Laws, causality, and theories Notes Bibliography.

Tres conceptos metacientíficos objeto de análisis filosófico son los de ley, modelo y teoría. El objetivo de este artículo es presentar la elucidación de estos conceptos, y de sus relaciones, hecha dentro del marco del Estructuralismo Metateórico o Sneediano (BALZER; MOULINES & SNEED, 1987), y de su aplicación a un caso del ámbito de la Biología: la Genética Clásica. El análisis realizado posibilitará fundamentar, en contra de lo que sostienen algunos filósofos de la ciencia en general y de la biología (...) en particular, las siguientes afirmaciones: a) que hay “leyes” en las ciencias biológicas, b) que muchos de los heterogéneos y distintos “modelos” de la Biología pueden ser acomodados bajo alguna “teoría”, y c) que justamente esto es lo que les confiere a las teorías biológicas su gran poder unificador. (shrink)

Explanations in genetics have intriguing aspects to both biologists and philosophers, and there is no account that satisfactorily elucidates such explanations. The aim of this article is to analyze the kind of explanations usually given in Classical (Transmission) Genetics (CG) and to present in detail the application of an account of explanation as ampliative, specialized nomological embedding to elucidate the such explanations. First, we present explanations in CG in the classical format of inferences with the explanans as the premises and (...) the explanandum as the conclusion and compare them with explanations in other paradigmatic explanatory fields such as Classical Mechanics. Second, we summarize the main aspects discussed in the literature with regard the peculiarities of genetic explanations. Third, we introduce the account of scientific explanation as ampliative, specialized nomological embedding making use of Sneedian structuralism, in particular the notions of theory-net, fundamental law or guiding principle, specialization, and special laws. Finally, we apply this account to the case of CG and show that this analysis sheds light to the intriguing aspects of genetic explanations and remove most of their alleged oddities. (shrink)

This book presents a thoroughly empiricist account of physics. By providing an overview of the development of empiricism from Ockham to van Fraassen the book lays the foundation for its own version of empiricism. Empiricism for the author consists of three ideas: nominalism, i.e. dismissing second order quantification as unnecessary, epistemological naturalism, and viewing classification of things in natural kinds as a human habit not in need for any justification. The book offers views on the realism-antirealism debate as well as (...) on the individuation of theories as a thoroughly neglected aspect of underdetermination. The book next discusses a broad range of topics, including the predicates body, spatial distance and time interval, the ontology of electromagnetism, propensities, the measurement problem and other philosophical issues in quantum theory. Discussions about the direction of time and about string theory make up the final part of the book. (shrink)

The status of laws of nature has been the locus of a lively debate in recent philosophy. Most participants have assumed laws play an important role in science and metaphysics while seeking their objective ground in the natural world, though some skeptics have questioned this assumption. So-called Humeans look to base laws on actual, particular facts such as those specified in David Lewis’s Humean mosaic. Their opponents argue that such a basis is neither necessary nor sufficient to support the independent (...) existence of scientific laws. This essentially metaphysical debate has paid scant attention to the details of scientific practice. It has mostly focused on so-called fundamental laws, assumed to take a particular form. I propose a pragmatist alternative—not as another position in the debate but as an alternative to the debate itself. This pragmatist alternative offers a view that questions the representational conception of truth presupposed by participants to the debate as well as the metaphysical import of fundamental laws. Statements of law serve many different purposes in science: I’ll look at some. But their central role is in inference, primarily to improve the epistemic state of a scientist with limited access to information. To play this role, a scientific law statement need be neither necessary, unconditionally universal nor even true. It must merely be sufficiently reliable within its domain of application. The use of laws in astrophysics and metrology will help to illustrate these points. (shrink)

Este trabajo consiste en un análisis de la tesis expuesta en el artículo de 1980 “Do the laws of physics state the facts?” de Nancy Cartwright, según la cual las leyes fundamentales de la física no “describen los hechos” porque, respecto de ellas, verdad y explicatividad se excluyen mutuamente. El texto fue luego republicado como tercer ensayo de su libro How the Laws of Physics Lie (1981), del que Mauricio Suárez afirma que el “trade-off” entre verdad y explicación es su (...) “tesis central”. El problema abordado es propio de la filosofía de la ciencia: cómo deben interpretarse o entenderse las leyes teóricas. Específicamente, si deben considerarse descripciones de hechos (es decir, literalmente, en el sentido de que existe una realidad con independencia de las leyes mismas y que las características de la realidad pueden ser representadas mediante el lenguaje: que tienen valor de verdad) o cumplen otra función dentro del conocimiento científico. El artículo de Cartwright estudia el caso del papel que cumplen las leyes fundamentales de la física cuando forman parte de las explicaciones por cobertura legal del tipo denominado por John Stuart Mill “por composición de causas”. Analiza la explicación de la atracción gravitatoria que hay entre dos objetos en un sistema físico en el que están presentes, además de las fuerzas gravitatorias, fuerzas eléctricas. Afirma que en ella la ley de la teoría de Newton tomada individualmente no describe lo que ocurre, no es verdadera. Pero no porque sea falsa sino porque su función o “rol” no consiste en “describir hechos” sino en ser parte de explicaciones científicas. Pero este argumento de la filósofa de la escuela de Stanford presenta dificultades semánticas, como el uso con dos sentidos diferentes del término teórico “fuerza”. Asimismo, es problemático que asuma que los hechos físicos son observables. Y no es correcta la afirmación de que una ley científica “se hace verdadera”, ni que “explica” hechos singulares, ni que “describe” en una explicación. (shrink)

One common feature of debates about the best metaphysical analysis of putatively lawful phenomena is the suspicion that nomic realists who locate the modal force of such phenomena in quasi-causal necessitation relations between universals are working with a model of law that cannot convincingly erase its theological pedigree. Nancy Cartwright distills this criticism into slogan form: no God, no laws. Some have argued that a more plausible alternative for nomic realists who reject theism is to ground laws of nature in (...) the fundamental dispositional properties or “pure powers” of physical objects. This article argues that for all its advantages over deflationary and rival realist accounts, a pandispositionalist account of law cuts against the commitment to metaphysical naturalism that its supporters almost always presuppose. It then examines and rejects a Platonic version of this account before elaborating and advancing a theistic alternative that is more theoretically powerful and more metatheoretically parsimonious. In slogan form: no God, no powers. (shrink)

A highly influential position in the debate between nomological realists and antirealists (i.e., the debate about the metaphysical status of natural laws) is the regularist theory of laws. Its main feature is the defense of a humean metaphysics which denies the existence of real causal powers and necessary connections in nature. Regularism, however, rely on a traditional reading of Hume’s philosophy. In this paper we aim to revisit the discussion around laws of nature in light of nontraditional interpretations of his (...) work, often labeled as the ‘New Hume’. (shrink)

Thomas Hobbes based his natural philosophy on definitions and general principles of matter in motion, which he refrained from calling “laws of nature.” Across the channel, René Descartes had presented his own account of matter in motion in such a way that laws of nature play a central causal-explanatory role. Despite some notable differences in the two systems of natural philosophy, the content of the three Cartesian laws of nature is shared by Hobbesian principles of motion. Why is it the (...) case that Hobbes never ‘transferred’ the concept of law of nature from the sphere of civil society to the realm of nature? What is the status of the Hobbesian principles of motion if they are not laws? Answering these questions is the main aim of this article. It is shown that Hobbes made available an importantly different and genuinely original way to do natural philosophy, which renders it free of metaphysics and eschews the need to ground it in anything other than ‘natural reason’. Briefly put, Hobbes took the category of ‘laws of nature’ to involve commitments that cannot be met in the natural world, unless natural philosophy loses its autonomy from theology and metaphysics. (shrink)

One might view the literature on laws of nature as dividing into two camps: the “metaphysical” advocates of laws as objective realities beyond any actual regularities, and the “antimetaphysical” skeptics. Hard-liners in both camps will find much to disagree with in Marc Lange’s Natural Laws in Scientific Practice. I mean that as a compliment to Lange’s work.

This book presents a radical new picture of natural order. The Newtonian idea of a cosmos ruled by universal and exceptionless laws has been superseded; replaced by a conception of nature as a realm of diverse powers, potencies, and dispositions, a 'dappled world'. There is order in nature, but it is more local, diverse, piecemeal, open, and emergent than Newton imagined. In each chapter expert authors expound the historical context of the idea of laws of nature, and explore the diverse (...) sorts of order actually presupposed by work in physics, biology, and the social sciences. They consider how human freedom might be understood, and explore how Newton's idea of a 'universal designer' might be revised, in this new context. They argue that there is not one unified totalizing program of science, aiming at the completion of one closed causal system. We live in an ordered universe, but we need to rethink the classical idea of the 'laws of nature' in a more dynamic and creatively diverse way. (shrink)

Nancy Cartwright has drawn attention to how explanations are actually given in mathematical sciences. She argues that these procedures support an antirealist thesis that fundamental explanatory laws are not true. Moreover, she claims to be be essentially following Duhem's line of thought in developing this thesis. Without wishing to detract from the importance of her observations, it is suggested that they do not necessarily require the antirealist thesis. The antirealist interpretation of Duhem is also disputed. It is argued that Duhemian (...) points, often understood antirealistically, bear a realist construal, and that antirealist interpretations of Duhem typically run into problems of consistency or of reducing his position to absurdity. (shrink)

This book on the philosophy of science argues for an empiricism, opposed to the tradition of David Hume, in which singular rather than general causal claims are primary; causal laws express facts about singular causes whereas the general causal claims of science are ascriptions of capacities or causal powers, capacities to make things happen. Taking science as measurement, Cartwright argues that capacities are necessary for science and that these can be measured, provided suitable conditions are met. There are case studies (...) from both econometrics and quantum mechanics. (shrink)

This book on the philosophy of science argues for an empiricism, opposed to the tradition of David Hume, in which singular rather than general causal claims are primary; causal laws express facts about singular causes whereas the general causal claims of science are ascriptions of capacities or causal powers, capacities to make things happen. Taking science as measurement, Cartwright argues that capacities are necessary for science and that these can be measured, provided suitable conditions are met. There are case studies (...) from both econometrics and quantum mechanics. (shrink)

SummaryThere are two rival ways in which events in the world can be explained: the covering law way and the dispositionalist way. The covering law model, which takes the law of nature as its fundamental explanatory unit, faces a number of renown difficulties. Rather than attempt to patch up this approach, the alternative dispositionalist strategy is recommended. On this view, general facts are dependent upon particular facts about what things do, rather than vice versa. This way of viewing the world (...) is not only more intuitive but also handles some of the notorious problems faced by laws; such as those of probabilistic and unrealized facts. The dispositionalist strategy faces its own difficulties of explaining generality and contingency of behaviour. It is shown, however, that at least these difficulties should not dissuade the dispositionalist. The prospects for a convincing dispositionalist ontology to replace one based on laws of nature are thus healthy. (shrink)

1Department of Philosophy, University of Bristol, 9 Woodland Road, Bristol BS8 1TB, UKScience Without Laws Ronald Giere Chicago, IL University of Chicago Press 1999 x + 285 Hardback£17.50.

The topic of laws of nature provides a kind of Rorschach test for philosophy. Some philosophers see in laws only Humean regularities; others see a kind of physical necessity; others see a necessity closer to logical necessity; others see expressions of causal powers; others see inference tickets; still others see relations between universals; ... ; and some see only a messy inkblot. We can also perform a meta-Rorschach test on the results of the first test. When van Fraassen and I (...) submit ourselves to this meta-test we both recoil with shock and horror. Where we differ is in drawing morals from this un- pleasant experience. For me the opprobrium falls mainly on the way philos- ophy is practiced. For van Fraassen, the disgrace also touches the practice, but for him the source is the rottenness of the concept of laws. (shrink)

The view that takes laws of nature to be essentially nothing more than descriptions of facts is still rather popular. The present article, on the contrary, defends the claim that the only real motivation for defending a descriptive view of laws—the quest for ontological parsimony—entails too high a price to pay in philosophical terms. It is argued that nomic primitivism, namely the alternative option that takes laws to be primitive fundamental entities in our ontology, is decisively more appealing, since it (...) is the crucial role assigned to laws that makes a scientific theory of natural phenomena a system rather than a list. Finally, the implications that nomic primitivism might have for the issue of the status of the wave function in that particular formulation of quantum mechanics known as Bohmian mechanics are considered. (shrink)

In this paper I argue against Nancy Cartwright's claim that we ought to abandon what she calls "fundamentalism" about the laws of nature and adopt instead her "dappled world" hypothesis. According to Cartwright we ought to abandon the notion that fundamental laws apply universally, instead we should consider the law-like statements of science to apply in highly qualified ways within narrow, non-overlapping and ontologically diverse domains, including the laws of fundamental physics. For Cartwright, "laws" are just locally applicable refinements of (...) a more open-ended concept of capacities. By providing a critique of the dappled world approach's central notion of open ended capacities and substituting this concept with an account of properties drawn from recent writing on the subject of structural realism I show that a form of fundamentalism is viable. I proceed from this conclusion to show that this form of fundamentalism provides a superior reading of case studies, such as the effective field theory program in quantum field theory, than the "dappled world" view. The case study of the EFT program demonstrates that ontological variability between theoretical domains can be accounted for without altogether abandoning fundamentalism or adopting Cartwright's more implausible theses. (shrink)

I develop a metaphysical position that is both lawless and anti-Humean. The position is called realist lawlessness and contrasts with both Humean lawlessness and nomological realism – the claim that there are laws in nature. While the Humean view also allows no laws, realist lawlessness is not Humean because it accepts some necessary connections in nature between distinct properties. Realism about laws, on the other hand, faces a central dilemma. Either laws govern the behaviour of properties from the outside or (...) from the inside. If the former, an unacceptable quidditist view of properties follows. But no plausible account of laws within properties can be developed that permits a governing role specifically for laws. I conclude in favour of eliminativism about laws. At the conceptual core, the notion of a law in nature is misleading. It is suggestive of an otherwise static world in need of animation. (shrink)

It is often supposed that the spectacular successes of our modern mathematical sciences support a lofty vision of a world completely ordered by one single elegant theory. In this book Nancy Cartwright argues to the contrary. When we draw our image of the world from the way modern science works - as empiricism teaches us we should - we end up with a world where some features are precisely ordered, others are given to rough regularity and still others behave in (...) their own diverse ways. This patchwork makes sense when we realise that laws are very special productions of nature, requiring very special arrangements for their generation. Combining classic and newly written essays on physics and economics, The Dappled World carries important philosophical consequences and offers serious lessons for both the natural and the social sciences. (shrink)

The goal of this thesis to defend the philosophical view of the new ante rem substantivism against its supposed alternatives. To achieve such goal, we will present four views about the nature of laws, two kinds of realism and two kinds of anti-realism, and evaluate them critically. The disadvantages from those theories are going to be presented for us to show that they are insufficient to provide a metaphysics that is able to explain the world's counterfactuality, universality, and regularity, and (...) that just one form of realism, the new ante rem substantivism, can. This goal is important because the concept of laws of nature is widely used in many areas of science and philosophy, and because according to the view we accept, the laws may fulfill some theoretical roles, and not others. We intent to show that the new ante rem substantivism's laws are able to fulfill the roles that scientists would hope the natural laws to fulfill. (shrink)

Dispositionalist accounts of scientific laws are currently at the forefront of discussions in the metaphysics of science. However, Mumford has presented such accounts with the following dilemma: if laws are to have a governing role, then they cannot be grounded in the relevant dispositions; if on the other hand, they are so grounded, then they cannot perform such a role. Mumford’s solution is drastic: to do away with laws as metaphysically substantive entities altogether. Dispositionalist accounts are also deficient in that (...) they either make no mention of the significant role of symmetries in science, or attempt to inappropriately eliminate this role. Here we shall attempt to motivate a structuralist view of laws by showing how it evades Mumford’s dilemma and accommodates the role of symmetry principles. In addition we shall consider how this view deals with a number of issues that dispositionalism finds problematic and indicate how the supposed necessity of laws and the explanation of relevant counterfactuals look from this structuralist perspective. (shrink)

Nancy Cartwright’s arguments in favor of the phenomenological laws and against the fundamental ones are discussed. I support and strengthen her criticism of the standard covering-law account but I am skeptical in respect to her radical conclusion that the laws of physics lie. Arguments in favor of the opposite stance are based on V.S. Stepin’s analysis of mature theory structure. A mature theory-change model presented here demonstrates how the fundamental laws of physics can be confronted with experience. Its case studies (...) include the Lorentz-Einstein-Bohr transition and modern General Relativity and Quantum Field Theory unification. (shrink)

This doctoral dissertation investigates the notion of physical necessity. Specifically, it studies whether it is possible to account for non-accidental regularities without the standard assumption of a pre-existent set of governing laws. Thus, it takes side with the so called deflationist accounts of laws of nature, like the humean or the antirealist. The specific aim is to complement such accounts by providing a missing explanation of the appearance of physical necessity. In order to provide an explanation, I recur to fields (...) that have not been appealed to so far in discussions about the metaphysics of laws. Namely, I recur to complex systems’ theory, and to the foundations of statistical mechanics. The explanation proposed is inspired by how complex systems’ theory has elucidated the way patterns emerge, and by the probabilistic explanations of the 2nd law of thermodynamics. More specifically, this thesis studies how some constraints that make no direct reference to the dynamics can be a sufficient condition for obtaining in the long run, with high probability, stable regular behavior. I hope to show how certain metaphysical accounts of laws might benefit from the insights achieved in these other fields. According to the proposal studied in this thesis, some regularities are not accidental not in virtue of an underlying physical necessity. The non-accidental character of certain regular behavior is only due to its overwhelming stability. Thus, from this point of view the goal becomes to explain the stability of temporal patterns without assuming a set of pre-existent guiding laws. It is argued that the stability can be the result of a process of convergence to simpler and stable regularities from a more complex lower level. According to this project, if successful, there would be no need to postulate a (mysterious) intermediate category between logical necessity and pure contingency. Similarly, there would be no need to postulate a (mysterious) set of pre-existent governing laws. Part I of the thesis motivates part II, mostly by arguing why further explanation of the notions of physical necessity and governing laws should be welcomed (chapter 1), and by studying the plausibility of a lawless fundamental level (chapters 2 and 3). Given so, part II develops the explanation of formation of simpler and stable behavior from a more complex underlying level. (shrink)

Nancy Cartwright has been a dominant figure in the philosophy of science for more than twenty years. In the early eighties she wrote her influential book "How the Laws of Physics Lie" which was generally perceived to be a challenge to a realistic conception of scientific theories. Over the last decade her focus has shifted to issues concerning what she calls "fundamentalism". This is the position that laws of nature are basic and that other things come from them. Cartwright rejects (...) this story and replaces it by the view that capacities are basic and that laws obtain "on account of the repeated Operation of a system of components with stable capacities in particularly fortunate circumstances". This book focuses mainly on Cartwright's recent work on laws and capacities. It is the outcome of the second series of the Munster lectures in philosophy which took place on May 5-6, 1998. This volume comprises a revised version of Cartwright's evening talk, 12 colloquium papers which Cartwright considered to be "extremely thought provoking", followed by replies Cartwright makes to each of them. (shrink)

Reductive Humeanism with regard to laws and chances, the view that law and chance claims are reducible to claims about Humean states of affairs, is a highly problematic doctrine. Even its most sophisticated contemporary version, espoused by David Lewis, leads to a litany of inadequately explained conflicts with our intuitions regarding laws, chances, and counterfactuals. The non-Humean alternative permits analyses that are adequate to the intuitive data. However, such analyses are insufficiently explanatory to be satisfactory. ;This dissertation motivates, elaborates, and (...) defends a third type of view, a non-reductive Humean projectivism on which law and chance claims are analysed in terms of an expressivist semantics. The benefit of this strategy is that it provides detailed explanations of the intuitions that are problematic for reductive Humeanism without relying on murky non-Humean explanations. However, there are numerous prima facie worries. Many philosophers surmise that the non-factual character of such an analysis must render law claims subjective or mind-dependent, or indeed, must lead to the denial of all law claims and, plausibly, all claims with nomic commitments of any kind. Further, there are technical worries, as represented by the Frege-Geach problem. The dissertation is responsive to such concerns, including the following features: A novel motivation of Humean projectivism is provided with reference to the explanatory goals of science. Detailed explanations of the intuitions that confound reductive Humeanism are provided. Notably, the analysis of chance laws is not susceptible to the problem of undermining futures, and further, the Principal Principle is both vindicated and justified. The Frege-Geach problem is solved using semantical tools of the kind developed by Allan Gibbard and Simon Blackburn. (shrink)

Laws of nature have, since Descartes, been seen as a central feature of scientific inquiry and philosophical analysis. The standard empiricist analysis of laws has come under challenge by realists, like Armstrong, who believe the analysis leaves out important features we intuitively ascribe to laws , and by antirealists like van Fraassen who believe the very notion ensnares us in metaphysics. In my dissertation, I defend the view against both the realists and van Fraassen that an empirically respectable notion of (...) scientific law is available within the framework of pragmatism, which relativizes lawhood to the choice of a language and a set of experimental manipulations. ;In chapter one, I argue that the philosophical problem of scientific laws has a long history, and that van Fraassen has picked out some tensions between views in that history. In chapter two, I analyze and criticize three realists' views and show that they have a flawed common strategy based on incompatible presuppositions. In chapter three, I argue for my own view, a pragmatist view that builds on the work of Dewey, Nagel, Goodman and Skyrms. I argue that replicability is the source of our confidence that regularities are projectible and resilient , and that this is the source of our confident assertion of counterfactuals, our belief in the necessary connection between events, and our belief that laws are empirically accessible. In chapter four, I answer objections from the realists, from van Fraassen and from those constructivists who find too much residual realism in my view. I there defend the view that one can have objectivity without being a realist, and relativity without being a relativist. (shrink)