Laws of Nature, Misc

I am interested in the use Kant makes of the pure intuition of space, and of properties and principles of space and spaces (i.e. figures, like spheres and lines), in the special metaphysical project of MAN. This is a large topic, so I will focus here on an aspect of it: the role of these things in his treatment of some of the laws of matter treated in the Dynamics and Mechanics Chapters. In MAN and other texts, Kant speaks of (...) space as the “ground,” “condition,” and “basis” of various laws, including the inverse-square and inverse-cube laws of attractive and repulsive force, and the Third Law of Mechanics. Moreover, in his proofs of all the laws just mentioned, the language of “construction” figures prominently, which suggests that Kant’s proofs (somehow) rest on or involve mathematical construction in his technical sense. Such claims give rise to a number of questions. How do properties and principles of space and spaces serve to ground this particular set of laws? Which spatial properties and principles is Kant appealing to? What, if anything, does the spatial grounding of the inverse-square and inverse-cube laws of diffusion (treated in the Dynamics Chapter) have in common with that of the Third treated in the Mechanics Chapter)? What role—if any—does mathematical construction play in Kant’s proofs of these laws? Finally, how if at all, are Kant’s grounding claims consistent with his other commitments—for example, how are they consistent with his notorious denial in Prolegomena §38 that there are any laws that “lie in space” (Prol 4:321)? I offer answers to these questions. (shrink)

The principle of Information Conservation or Determinism is a governing assumption of physical theory. Determinism has counterfactual consequences. It entails that if the present were different, then the future would be different. But determinism is temporally symmetric: it entails that if the present were different, the past would also have to be different. This runs contrary to our commonsense intuition that what has happened in the future depends on the past in a way the past does not depend on the (...) future. To understand how this can be so we observe that while the truth of some counterfactuals is guaranteed by the laws of logic or the laws of nature, some are not. It is among the latter contingent, counterfactuals that we find temporal asymmetry. It is this asymmetry that gives causation a temporal direction. The temporal asymmetry of these counterfactuals is explained by the fact that the dynamical laws of nature are logically irreversible functions from partial states of the world onto other partial states. (Logical reversibility is not to be confused, though it too often is, with time-reversal invariance). Though these irreversible laws are locally indeterministic, they can sum to give a globally deterministic description of the world. This combination of global determinism and local indeterminism gives rise to contingent counterfactual dependence and gives that dependence a direction. That direction is independent of the direction of entropy. The direction of contingent counterfactual dependence is time's arrow. (shrink)

We argue that a particular approach to satisfying the broad predictive ambitions of the sciences demands law confirmation. On this approach we confirm non-nomic generalizations by confirming there are no actually realized ways of causing disconfirming cases. This gives causal generalizations a crucial role in prediction. We then show how rational judgements of relevant causal similarity can be used to confirm that causal generalizations themselves have no actual disconfirmers, providing a distinctive and clearly viable methodology for inductively confirming them. Finally, (...) we argue that for agents in our epistemic position using this methodology to confirm causal generalizations of adequate breadth will commonly demand law confirmation. We make a prima facie assessment of the methodology’s fit with scientific practice and briefly consider the prospects for an associated analysis of laws. (shrink)

In this paper, I analyze some disagreements about scientific ontology as cases of disagreement between epistemic peers. I maintain that the particularities of these cases are better understood if epistemic peerhood is relativized to a perspective-like index of epistemic goals and values. Taking the debate on the metaphysics of laws of nature as a case study, I explore the limits and possibilities of a trans-perspective assessment of positions regarding scientific ontology.

If there are fundamental laws of nature, can they fail to be exact? In this paper, I consider the possibility that some fundamental laws are vague. I call this phenomenon 'fundamental nomic vagueness.' I characterize fundamental nomic vagueness as the existence of borderline lawful worlds and the presence of several other accompanying features. Under certain assumptions, such vagueness prevents the fundamental physical theory from being completely expressible in the mathematical language. Moreover, I suggest that such vagueness can be regarded as (...) 'vagueness in the world.' For a case study, we turn to the Past Hypothesis, a postulate that (partially) explains the direction of time in our world. We have reasons to take it seriously as a candidate fundamental law of nature. Yet it is vague: it admits borderline (nomologically) possible worlds. An exact version would lead to an untraceable arbitrariness absent in any other fundamental laws. However, the dilemma between fundamental nomic vagueness and untraceable arbitrariness is dissolved in a new quantum theory of time's arrow. (shrink)

This paper aims to explain why the laws of nature are held fixed in counterfactual reasoning. I begin by highlighting three salient features of counterfactual reasoning: it is conservative, nomically guided, and it uses hindsight. I then present a rationale for our engagement in counterfactual reasoning that aims to make sense of these features. In particular, I argue that counterfactual reasoning helps us evaluate the evidential relations between unanticipated pieces of evidence and various hypotheses of interest about the history of (...) the actual world. Given this goal, it makes a great deal of sense that counterfactual reasoning would have the aforementioned features. Additionally, it turns out that this account of counterfactual reasoning is nicely congruent with Humean views of laws. Specifically, it can explain, in a Humean-friendly way, both why the laws are counterfactually resilient, and why we may be inclined to have anti-Humean intuitions in the first place, even if some form of Humeanism is correct. (shrink)

If one is interested in reasoning counterfactually within a physical theory, one cannot adequately use the standard possible world semantics. As developed by Lewis and others, this semantics depends on entertaining possible worlds with miracles, worlds in which laws of nature, as described by physical theory, are violated. Van Fraassen suggested instead to use the models of a theory as worlds, but gave up on determining the needed comparative similarity relation for the semantics objectively. I present a third way, in (...) which this similarity relation is determined from properties of the models contextually relevant to the truth of the counterfactual under evaluation. After illustrating this with a simple example from thermodynamics, I draw some implications for future work, including a renewed possibility for a viable deflationary account of laws of nature. (shrink)

The article focuses on the unifying and explanatory power of the selective realism defended by Anjan Chakravartty. Our main aim is twofold. First, we critically analyse the purported synthesis between entity realism and structural realism offered by the author. We give reasons to think that this unification is an inconvenient marriage. In the second step, we deal with certain controversial aspects of the intended unification among three metaphysical concepts: causation, laws of nature and natural kinds. After pointing out that Chakravartty’s (...) conception of laws is a plausible view that a scientific realist might endorse, we contend, on the contrary, that the concept of natural kind is dispensable in the framework of Chakravartty’s realism. (shrink)

This paper examines some possibilities for the laws of nature changing over time. This is done within the context of recent literature on transformational emergence. Transformational emergence is a diachronic account of emergence that does not require the invariance of fundamental objects, properties, and laws. The requirement that no new laws are introduced after the first instance of the universe seems to indicate that all the laws of the universe are present from the outset. By using a dispositional approach to (...) fundamental properties, this restriction can be avoided. An argument appealing to quantitative laws of nature is then used to show that such laws are not, contrary to dispositional essentialism, metaphysically necessary. Further arguments are given to support the possibility of change of laws across time rather than across worlds and why the identity conditions for properties are different in the two cases. The paper is framed by an analysis of John Stuart Mill’s reasons for imposing the invariance requirement on fundamental laws. (shrink)

ABSTRACT: In a previous article (O’Shea 2006) I provided a concise overview of the reception of Kant’s philosophy among analytic philosophers during the periods from the ‘early analytic’ reactions to Kant in Frege, Russell, Carnap and others, to the systematic Kant-inspired works in epistemology and metaphysics of C. I. Lewis and P. F. Strawson, in particular. In this chapter I use the recently reinvigorated work of Wilfrid Sellars (1912–1989) in the second half of the twentieth century as the basis for (...) presenting some of the most familiar ‘analytic Kantian’ themes that continue to animate current debates. I also argue that the complex relationships between Sellars’ philosophy and Kant’s thought are often misunderstood. Overall the chapter examines Sellars’ analytic appropriations of Kant in three topic-areas of significant current philosophical debate: (1) conceptual analysis and the structure of human knowledge; (2) laws of nature, the causal modalities, and the pragmatic or relative a priori; and (3) the disputes concerning Kant and nonconceptual content. (shrink)

Comments on Eric Watkins, "Kant on Laws" (Cambridge, 2019).

My thesis in this paper is: the modern concept of laws of motion—qua dynamical laws—emerges in 18th-century mechanics. The driving factor for it was the need to extend mechanics beyond the centroid theories of the late-1600s. The enabling result behind it was the rise of differential equations. -/- In consequence, by the mid-1700s we see a deep shift in the form and status of laws of motion. The shift is among the critical inflection points where early modern mechanics turns into (...) classical mechanics as we know it. Previously, laws of motion had been channels for truth and reference into mechanics. By 1750, the laws lose these features. Instead, now they just assert equalities between functions; and serve just to entail (differential) equations of motion for particular mechanical setups. This creates two philosophical problems. First, it’s unclear what counts as evidence for the laws of motion in the Enlightenment. Second, it’s a mystery whether these laws retain any notion of causality. That subverts the early-modern dictum that physics is a science of causes. (shrink)

Skow ([2007]), and much more recently Callender ([2017]), argue that time can be distinguished from space due to the special role it plays in our laws of nature: our laws determine the behaviour of physical systems across time, but not across space. In this work we assess the claim that the laws of nature might provide the basis for distinguishing time from space. We find that there is an obvious reason to be sceptical of the argument Skow submits for distinguishing (...) time from space: Skow fails to pay sufficient attention to the relationship between the dynamical laws and the antecedent conditions required to establish a complete solution from the laws. Callender’s more sophisticated arguments in favour of distinguishing time from space by virtue of the laws of nature presents a much stronger basis to draw the distinction. By developing a radical reading of Callender’s view we propose a novel approach to differentiating time and space that we call temporal perspectivalism. This is the view according to which the difference between time and space is a function of the agentive perspective. (shrink)

In the Second Analogy, Kant argues that every event has a cause. It remains disputed what this conclusion amounts to. Does Kant argue only for the Weak Causal Principle that every event has some cause, or for the Strong Causal Principle that every event is produced according to a universal causal law? Existing interpretations have assumed that, by Kant’s lights, there is a substantive difference between the two. I argue that this is false. Kant holds that the concept of cause (...) contains the notion of lawful connection, so it is analytic that causes operate according to universal laws. He is explicit about this commitment, not least in his derivation of the Categorical Imperative in Groundwork III. Consequently, Kant’s move from causal rules to universal laws is much simpler than previously assumed. Given his commitments, establishing the Strong Causal Principle requires no more argument than establishing the Weak Causal Principle. (shrink)

This article considers the sexual politics of animal evidence in the context of German sexology around 1920. In the 1910s, the German-Jewish geneticist Richard B. Goldschmidt conducted experiments on the moth Lymantria dispar, and discovered individuals that were no longer clearly identifiable as male or female. When he published an article tentatively arguing that his research on ‘intersex butterflies’ could be used to inform concurrent debates about human homosexuality, he triggered a flurry of responses from Berlin-based sexologists. In this article, (...) I examine how a number of well-known sexologists affiliated with Magnus Hirschfeld, his Scientific-Humanitarian Committee, and later his Institute of Sexology attempted to incorporate Goldschmidt’s experiments into their sexological work between 1917 and 1923. Intersex butterflies were used to discuss issues at the heart of German sexology: the legal debate about the criminalisation of homosexuality under paragraph 175; the scientific methodology of sexology, caught between psychiatric, biological, and sociological approaches to the study of sexual and gender diversity; and the status of sexology as natural science, able to contribute knowledge about the sexual Konstitution of the organism. This article thus shows that butterfly experiments function as important and politically charged evidence for a discussion at the heart of the sexological project of those involved in the founding of the Institute of Sexology: the question of the nature and naturalness of homosexuality and its political consequences. In doing so, this article makes a case for paying attention to non-human actors in the history of sexology. (shrink)

I discuss three sets of worries concerning Watkins’ account of laws of nature in Kant on Laws. First, I argue contra Watkins that Kant’s laws of nature do not depend on acts of prescription in any literal sense. Second, I question how his generic conception of laws applies to empirical laws of nature and suggest that the worries about unknowability or contingency that he raises for contemporary alternatives may equally arise for empirical laws on Kant’s account. Finally, I discuss his (...) claim that Kant’s a priori laws depend on the immutability of human cognitive capacities and ask how this immutability should be understood. (shrink)

We expect the laws of nature that describe the universe to be exact, but what if that isn't true? In this popular science article, I discuss the possibility that some candidate fundamental laws of nature, such as the Past Hypothesis, may be vague. This possibility is in conflict with the idea that the fundamental laws of nature can always and faithfully be described by classical mathematics. -/- [Bibliographic note: this article is featured on the magazine website under a different title (...) as "The fuzzy law that could break the idea of a mathematical universe" and on the magazine cover as "The Flaw at the Heart of Reality: Why precise mathematical laws can never fully explain the universe." It is a popular version of the article "Nomic Vagueness" that can be found on arXiv: 2006.05298.]. (shrink)

There are many books on Kant's accounts of the laws of nature and of the moral law, but there is almost no literature that covers both topics in order to clarify their common grounds and their diff...

Kant on Laws is a collection of papers that Eric Watkins published from 1997 to 2018, "lightly rewritten," as he says, and accompanied with a new Introduction that states the general thesis that Kant has a univocal conception of law that applies to both laws of nature and the moral law. "Kant's most generic conception of law… includes two essential elements: necessity and the act of a spontaneous faculty whose legislative authority prescribes that necessity to a specific domain through an (...) appropriate act". These conditions are satisfied by both laws of nature and the moral law. They differ, however, in that laws of nature apply ultimately to objects that are given to us through... (shrink)

Metaphysics should follow science in postulating laws alongside properties. I defend this claim against the claim that natural properties conceived as powers make laws of nature redundant. Natural properties can be construed in a “thin” or a “thick” way. If one attributes a property in the thin sense to an object, this attribution does not conceptually determine which other properties the object possesses. The thin construal is underlying the scientific strategy for understanding nature piecemeal. Science explains phenomena by cutting reality (...) conceptually in properties attributed to space-time points, where these properties are conceived of independently of each other, to explore then, in a separate step, how the properties are related to each other; those determination relations between properties are laws. This is compatible with the thesis that laws are metaphysically necessary. According to the thick conception, a property contains all its dependency relations to other properties. The dependency relationships between properties (which appear as laws in the thin conception) are parts of the properties they relate. There are several reasons to resist the thick conception of properties. It makes simple properties “holistic”, in the sense that each property contains many other properties as parts. It cannot account for the fact that properties constrain each other’s identity; it can neither explain why natural properties are linked to a unique set of dispositions, nor why and how this set is structured nor why the truth-maker of many disposition attributions is relational although the disposition is grounded on a monadic property. (shrink)

The Humean best systems account identifies laws of nature with the regularities in a system of truths that, as a whole, best conforms to scientific standards for theory-choice. A principled problem for the BSA is that it returns the wrong verdicts about laws in cases where multiple systems, containing different regularities, satisfy these standards equally well. This problem affects every version of the BSA because it arises regardless of which standards for theory-choice Humeans adopt. In this paper, we propose a (...) Humean response to the problem. We invoke pragmatic aspects of Humean laws to show that the BSA, despite violating some of our intuitive judgements, can capture everything that is relevant for scientific practice. (shrink)

In this article, the author examines Keith Lehrer’s response to the Consequence Argument. He argues that his response has advantages over David Lewis’s. Contrary to what Lewis suggests in a footnote, Lehrer’s assessment of an ability to affect the laws of nature in deterministic settings is largely the same as Lewis’s. However, Lehrer’s position has an advantage that Lewis’s lacks. Lehrer integrates his proposal within a positive account of freedom, and this helps to explain how it could be that an (...) agent is able to do otherwise in deterministic settings in such a way that if she did, some law of nature would be different. (shrink)

This book contextualizes David Hume's philosophy of physical science, exploring both Hume's background in the history of early modern natural philosophy and its subsequent impact on the scientific tradition.

This book deals with an internal theme of metaphysics, which is the metaphysics of the laws of nature. The author presents traditional contemporary theories, as well as his own original theory, and evaluates each one at a time. He also addresses the problem of the modality of the laws of nature and makes some criticism of the standard view of necessity as truth in all possible worlds, and shows an application of his discussion to the metaphysics of physics. / Este (...) livro trata de um tema interno à metafísica, que é a metafísica das leis da natureza. O autor apresenta as teorias tradicionais contemporâneas, tal como também a sua própria teoria original, e avalia cada uma delas por vez. Ele também aborda o problema da modalidade das leis da natureza e apresenta uma certa crítica à visão padrão da necessidade como verdade em todos os mundos possíveis, e mostra uma aplicação da sua discussão à metafísica da Física. (shrink)

This paper is a response to McKenzie (2017). I argue that the case she presents is not a genuine counterexample to the thesis she labels Brute Fundamentalism. My response consists of two main points. First, that the support she presents for considering her case a metaphysical explanation is misguided. Second, that there are principled reasons for doubting that partial explanations in Hempel’s sense, of which her case is an instance, are genuinely explanatory in the first place. Thus McKenzie’s attack on (...) Brute Fundamentalism fails. (shrink)

Fisikak duen munduaren ulerkera eta askatasuna (edo nork bere burua gobernatzeko gaitasuna) uztartu daitezkeela defendatu nahi du Ismaelek liburuan. Askatasuna ez dago modan, ordea. Fatalismoa da nagusi. Alde handia dago bizi dugun munduaren eta fisikak deskribatzen duenaren artean, eta ohikoa da “Bizi duguna fisikak ilusioa dela erakusten du” eta horrelakoak entzutea. Beste askori, askatasunaren defentsa metafisikoa lekuz kanpokoa irudituko zaio. Horiek, askatasuna orain eta hemen behar dela defendatuko dute. Ez duela inongo zentzurik askatasuna termino horietan pentsatzeak.

After reconstructing some features of the Scholastic treatment of contingency in natural philosophy, this paper draws a comparison between Descartes’ treatments of the issue of the laws of nature in Le Monde and in the Principles of Philosophy. On the basis of this comparison, it argues that elements of the Scholastic understanding of contingency as due to the impediment provided by matter are still present in the former. While in the Principles Descartes appears to equate contingency with an epistemological limitation (...) in our understanding of the complexity of natural phenomena, in conclusion I argue that some elements of his previous approach to the issue remains in his treatment of curvilinear motion. (shrink)

Metaphysics of Science is the philosophical study of key concepts that figure prominently in science and that, prima facie, stand in need of clarification. It is also concerned with the phenomena that correspond to these concepts. Exemplary topics within Metaphysics of Science include laws of nature, causation, dispositions, natural kinds, possibility and necessity, explanation, reduction, emergence, grounding, and space and time. -/- Metaphysics of Science is a subfield of both metaphysics and the philosophy of science—that is, it can be allocated (...) to either, but it exhausts neither. Unlike metaphysics simpliciter, Metaphysics of Science is not primarily concerned with metaphysical questions that may already arise from everyday phenomena such as what makes a thing (a chair, a desk) the very thing it is, what its identity criteria are, out of which parts is it composed, whether it remains the same if we exchange a couple of its parts, and so forth. Nor is it concerned with the concrete entities (superstrings, molecules, genes, and so forth) postulated by specific sciences; these issues are the subject matter of the special philosophies of science (for example, of physics, of chemistry, of biology). -/- Metaphysics of Science is concerned with more abstract and general concepts that inform all of these sciences. Many of these concepts are interwoven with each other. For example, metaphysicians of science inquire whether dispositionality, lawhood, and causation can be accounted for in nonmodal terms; whether laws of nature presuppose the existence of natural kinds; and whether the properties of macrolevel objects supervene on dispositional or nondispositional properties. -/- This article surveys the scope (section 1), historical origin (section 2), exemplary subject matters (section 4), and methodology (section 5) of Metaphysics of Science, as well as the motivation that drives it (section 3). (shrink)

I argue physicalism should be characterized as the thesis that all behavior is law-governed. This characterization captures crucial desiderata for a formulation of physicalism, including its broad import and worldview defining features. It also has more local virtues, such as avoiding Hempel’s dilemma. A particularly important implication, I argue, is that this thesis makes the question of the mind’s physicality turn on what the mind can do- rather than what experience is like.

If physics is a science that unveils the fundamental laws of nature, then the appearance of mathematical concepts in its language can be surprising or even mysterious. This was Eugene Wigner’s argument in 1960. I show that another approach to physical theory accommodates mathematics in a perfectly reasonable way. To explore unknown processes or phenomena, one builds a theory from fundamental principles, employing them as constraints within a general mathematical framework. The rise of such theories of the unknown, which I (...) call blackbox models, drives home the unsurprising effectiveness of mathematics. I illustrate it on the examples of Einstein’s principle theories, the S-matrix approach in quantum field theory, effective field theories, and device-independent approaches in quantum information. (shrink)

In the ‘Appendix to the Transcendental Dialectic’ of the Critique of Pure Reason, Kant contends that the idea of God has a positive regulative role in the systematization of empirical knowledge. But why is this regulative role assigned to this specific idea? Kant’s account is rather opaque and this question has also not received much attention in the literature. In this paper I argue that an adequate understanding of the regulative role of the idea of God depends on the specific (...) metaphysical content Kant attributes to it in the Critique and other writings. I show that neither a heuristic principle of conceptual systematicity, nor conceiving God as a hypothesis of an intelligent designer, can satisfy the demands of reason to make the unity and necessity of the laws of nature intelligible. Regarding the positive account about the metaphysical content of the idea of God, I support my argument by referring to Kant’s pre-critical discussion of the usefulness of the conception of God for the project of science, and by expounding Kant’s critical account of the necessity of the laws of nature. Thus my account sheds light on the continuity of Kant’s conception of God and his appropriation of his own rationalistic metaphysics. (shrink)

In this paper, we argue that the Consequence Argument relies on empirical premises. In particular, we show how the argument depends upon assumptions about the character of the laws of nature.

Over the course of the past half-century and in the wake of the first articles published on the matter by Edgar Zilsel, Joseph Needham, and myself, historians of science have come to focus with growing insistence on the rise to prominence among the seventeenthw-century mechanical philosophers of the concept of laws of nature and on the significant role it played in the emergence of early-modern science. Revisiting the case I made on that matter in 1961, this paper goes on to (...) engage in dialogue with the related but divergent argument John Henry framed in the course of his “Metaphysics and the Origins of Modern Science,” an article that appeared in in the pages of Early Science and Medicine in the year 2004. (shrink)

The scattered and pervasive variability of material objects, being a conspicuous part of the very experience of early-modern and modern science, challenges its purely theoretic character in many ways. Problems of this kind turn out in such different scientific contexts as Galilean physics, chemistry, and physiology. Practical answers are offered on the basis of different approaches, among which, in particular, two can be singled out. One is made out by what is often called an ‘art’ of experiments. From the Renaissance (...) until J. H. Lambert’s writings of the 1750–1760s, we can follow a train of reflections on the art of making experiments that deal precisely with the persistence of contingency in the material objects of pure science. The other is the analysis of contingency in probabilistic terms. They develop subsequently and eventually meet, as it can be seen precisely in Lambert’s work: among the first to pursue this path are Jakob Bernoulli and Leibniz. (shrink)

It is common to appeal to governing laws of nature in order to explain the existence of natural regularities. Classical theism, however, maintains the sovereignty thesis: everything distinct from God is created by him and is under his guidance and control. It follows from this that God must somehow be responsible for natural laws and regularities. Therefore, theists need an account of the relation between regularities, laws, and God. I examine competing accounts of laws of nature and conclude that dispositional (...) essentialism provides the most satisfactory explanation of the relation between, and. (shrink)

RESUMEN Un experimento mental en ciencias fácticas consiste en la representación de un escenario imaginario. A partir de la presentación de condiciones iniciales y la postulación de una situación hipotética o contrafáctica, se solicita al lector que realice mentalmente alguna operación, manipule ciertas variables o ponga en funcionamiento algún aparato o instrumento. En virtud de este ejercicio sería posible, en principio, obtener nuevo conocimiento acerca de algún aspecto del mundo natural. El debate acerca de las funciones de los experimentos mentales (...) en las ciencias fácticas está centrado en establecer la validez del conocimiento acerca del mundo empírico que estos dispositivos son capaces de proporcionar. La propuesta interpretativa de Brown da sustento a la idea de que, en casos excepcionales, los experimentos mentales pueden cumplir funciones probatorias. Los denominados “experimentos mentales platónicos” permiten intuir leyes de la naturaleza y justificar a priori las hipótesis propuestas. Sostenemos que la conexión trazada por Brown entre los experimentos mentales y leyes naturales exhibe un aspecto problemático de su filosofía: el compromiso injustificado con una metafísica inflacionaria. Mostramos que es posible explicar el mecanismo a través del cual estos dispositivos proporcionan conocimiento nuevo y dar cuenta tanto de su poder heurístico cómo de su valor evidencial a partir compromisos metafísicos más modestos. ABSTRACT Thought experiments in factual science consists on the representation of an imaginary scenario. Starting with the presentation of a hypothetical or counterfactual situation and the description of initial conditions, the reader is asked to mentally perform some operation, to manipulate certain variables or to put into operation some apparatus or instrument. In virtue of this exercise, it would be possible to obtain new knowledge about the natural world. The debate on the functions of thought experiments in physics is focused on determining the validity of the empirical knowledge that these devices are capable of providing. Brown supports the idea that, in exceptional cases, thought experiments can perform probative functions. The so-called “Platonic Thought Experiments” allow us to intuit laws of nature and provide an a priori justification of the proposed hypotheses. We hold that Brown's connection between thought experiments and laws of nature exhibits a problematic aspect of his philosophy: the unjustified commitment with an inflationary metaphysics. We show that it is possible to explain the mechanism through which these devices provide new knowledge and give an account of both their heuristic power and their evidential value from modest metaphysical commitments. (shrink)

This paper examines the question of whether certainty can be achieved in sciences, according to the principles of empiricism and tries to identify the reasons why Hume was strangely benighted in the mid-eighteenth century by the Franco-Berlin school. The paper argues that Maupertuis’ reading of the Humean conception of causality in his Philosophical Examination of the Proof the Existence of God Employed in the Essay on Cosmology relies upon his criticism of Hume’s thesis on causality. It also suggests that there (...) is a significant link with Quine’s epistemological distinction between conceptual and doctrinal research. That Hume’s thesis was benighted is even stranger considering that both texts were involved in the dissemination of Newtonianism. In this framework, André Charrak studies the true problem of the certainty of the laws of nature and points out that, for an eighteenth-century empiricist, these laws refer to the theoretical laws of mechanics which also originate in the Principia mathematica. The reference to Buffon and D’Alembert serves to support the author’s fundamental thesis that the concept of applying one science to another has been at the heart of Enlightenment’s epistemological empiricism. Advancing an original point of view, Charrak argues that characterizing empiricism through the promotion of an analytical order indicates the influence of Leibniz. Identifying this influence allows to pinpoint the proper distinction between Franco-Berlin empiricism from Humean empiricism. (shrink)

This paper aims to answer the question: what does the realism of laws of nature consist of? To achieve this, in the first part, three philosophical accounts of laws of nature are presented and examined: the universalist, the dispositionalist and the counter-factualist. The presentation and examination focuses on the answer given by each of these accounts to the question: what is a law of nature? Later, in the second part, convergences and divergences between these three accounts are shown. Finally, in (...) the third section, the points of agreement between them are put together to advance the fundamental thesis that encompasses each of these accounts as realist accounts of laws of nature. This thesis, I argue, is at the end the core of the general realist stance on laws of nature that I name “Realism of Laws of Nature”. (shrink)

According to the premises of the fine-tuning argument, most nomologically possible universes lack intelligent life; and the fact that ours has intelligent life is best explained by supposing it was created. However, if our universe was created, then the creator chose the laws of nature, and hence chose in favor of lifeless universes. In other words, the fine-tuning argument shows that God prefers universes without intelligent life; and the fact that our universe has intelligent life provides no new evidence for (...) God's existence. (shrink)

Humean reductionism about laws of nature appears to leave a central aspect of scientific practice unmotivated: If the world’s fundamental structure is exhausted by the actual distribution of non-modal properties and the laws of nature are merely efficient summaries of this distribution, then why does science posit laws that cover a wide range of non-actual circumstances? In this paper, we develop a new version of the Humean best systems account of laws based on the idea that laws need to organize (...) information in a way that maximizes their cognitive usefulness for creature like us. We argue that this account motivates scientific practice because the laws’ applicability to non-actual circumstances falls right out of their cognitive usefulness. (shrink)