Unlike in physics, the category of thought experiment is not very common in biology. At least there are no classic examples that are as important and as well-known as the most famous thought experiments in physics, such as Galileo’s, Maxwell’s or Einstein’s. The reasons for this are far from obvious; maybe it has to do with the fact that modern biology for the most part sees itself as a thoroughly empirical discipline that engages either in (...) real natural history or in experimenting on real organisms rather than fictive ones. While theoretical biology does exist and is recognized as part of biology, its role within biology appears to be more marginal than the role of theoretical physics within physics. It could be that this marginality of theory also affects thought experiments as sources of theoretical knowledge. Of course, none of this provides a sufficient reason for thinking that thought experiments are really unimportant in biology. It is quite possible that the common perception of this matter is wrong and that there are important theoretical considerations in biology, past or present, that deserve the title of thought experiment just as much as the standard examples from physics. Some such considerations may even be widely known and considered to be important, but were not recognized as thought experiments. In fact, as we shall see, there are reasons for thinking that what is arguably the single most important biological work ever, Charles Darwin’s On the Origin of Species, contains a number of thought experiments. There are also more recent examples both in evolutionary and non-evolutionary biology, as we will show. Part of the problem in identifying positive examples in the history of biology is the lack of agreement as to what exactly a thought experiment is. Even worse, there may not be more than a family resemblance that unifies this epistemic category. We take it that classical thought experiments show the following characteristics: They serve directly or indirectly in the non-empirical epistemic evaluation of theoretical propositions, explanations or hypotheses. Thought experiments somehow appeal to the imagination. They involve hypothetical scenarios, which may or may not be fictive. In other words, thought experiments suppose that certain states of affairs hold and then try to intuit what would happen in a world where these suppositions are true. We want to examine in the following sections if there are episodes in the history of biology that satisfy these criteria. As we will show, there are a few episodes that might satisfy all three of these criteria, and many more if the imagination criterion is dropped or understood in a lose sense. In any case, this criterion is somewhat vague in the first place, unless a specific account of the imagination is presupposed. There will also be issues as to what exactly “non-empirical” means. In general, for the sake of discussion we propose to understand the term “thought experiment” here in a broad rather than a narrow sense here. We would rather be guilty of having too wide a conception of thought experiment than of missing a whole range of really interesting examples. (shrink)

Thought experiments de facto play many different roles in biology: economical, ethical, technical and so forth. This paper, however, is interested in whether there are any distinctive features of biological TEs as such. The question may be settled in the affirmative because TEs in biology have a function that is intimately connected with the epistemological and methodological status of biology. Peculiar to TEs in biology is the fact that the reflexive, typically human concept of finality (...) may be profitably employed to discover mechanical-experimental causal relations in all living beings—with the obvious caveat that we do not hypostatise and interpret this concept as an ontological quality, since this would land one in an implicitly animistic, pre-Galilean view of nature. From a methodical point of view, the concept of finality is an essential assumption as well as a powerful heuristic tool in the practice of biology, that is, in the investigation of living beings in an intersubjectively testable and reproducible way. (shrink)

What is artificial life? Much has been said about this interesting collection of efforts to artificially simulate and synthesize lifelike behavior and processes, yet we are far from having a robust philosophical understanding of just what Alifers are doing and why it ought to interest philosophers of science, and philosophers of biology in particular. In this paper, I first provide three introductory examples from the particular subset of artificial life I focus on, known as ‘soft Alife’ (s-Alife), and follow (...) up with a more in-depth review of the Avida program, which serves as my case study of s-Alife. Next, I review three well-known accounts of thought experiments, and then offer my own synthesized account, to make the argument that s-Alife functions as thought experimentation in biology. I draw a comparison between the methodology of the thought-experimental world that yields real-world results, and the s-Alife research that informs our understanding of natural life. I conclude that the insights provided by s-Alife research have the potential to fundamentally alter our understanding of the nature of organic life and thus deserve the attention of both philosophers and natural scientists. (shrink)

This is a digest of how various researchers in biology and astrobiology have explored questions of what defines living organisms—definitions based on functions or structures observed in organisms, or on systems terms, or on mathematical conceptions like closure, chirality, quantum mechanics and thermodynamics, or on biosemiotics, or on Darwinian evolution—to clarify the field and make it easier for endeavors in artificial intelligence to make progress. Current ideas are described to promote work between astrobiologists and computer scientists, each concerned with (...) living organisms. A four-parameter framework is presented as a scaffold that is later developed into what machines lack to be considered alive: systems, evolution, energy and consciousness, and includes Jagers operators and the idea of dual closure. A novel definition of consciousness is developed which describes mental objects both with and without communicable properties, and this helps to clarify how consciousness in machines may be studied as an emergent process related to choice functions in systems. A perspective on how quantization, acting on nucleic acids, sets up natural limits to system behavior is offered as a partial address to the problem of biogenesis. (shrink)

The aim of this paper is to show how thought experiments help us learn about laws. After providing examples of this kind of nomic illumination in the first section, I canvass explanations of our modal knowledge and opt for an evolutionary account. The basic application is that the laws of nature have led us to develop rough and ready intuitions of physical possibility which are then exploited by thought experimenters to reveal some of the very laws responsible for (...) those intuitions. The good news is that natural selection ensures a degree of reliability for the intuitions. The bad news is that the evolutionary account seems to limit the range of reliable thought experiment to highly practical and concrete contexts. In the fifth section, I provide reasons for thinking that we are not as slavishly limited as a pessimistic construal of natural selection suggests. Nevertheless, I promote the idea that biology is a promising source of predictions and diagnoses of thought experiment failures. (shrink)

The aim of this paper is to show how thought experiments help us learn about laws. After providing examples of this kind of nomic illumination in the first section, I canvass explanations of our modal knowledge and opt for an evolutionary account. The basic application is that the laws of nature have led us to develop rough and ready intuitions of physical possibility which are then exploited by thought experimenters to reveal some of the very laws responsible for (...) those intuitions. The good news is that natural selection ensures a degree of reliability for the intuitions. The bad news is that the evolutionary account seems to limit the range of reliable thought experiment to highly practical and concrete contexts. In the fifth section, I provide reasons for thinking that we are not as slavishly limited as a pessimistic construal of natural selection suggests. Nevertheless, I promote the idea that biology is a promising source of predictions and diagnoses of thought experiment failures. (shrink)

Animalism is prima facie the most plausible view about what we are; it aligns better with science and common sense, and is metaphysically more parsimonious. Thought experiments involving the brain, however, tend to elicit intuitions contrary to animalism. In this paper, I examine two classical thought experiments from the literature, brain transplant and cerebrum transplant, and a new one, cerebrum regeneration. I argue that they are theoretically possible, but that a scientifically informed account of what would actually happen (...) shows that in none of the cases would the person be separated from the animal. Our intuitions in these cases, when adequately informed by neuroscience, do not conflict with animalism – rather, they suggest a correction of the animalist position: the persisting animal should be at least minimally sentient. Sentience animalism is a new formulation of the animalist account of personal identity that allows us to reconcile facts about our biological persistence conditions with the intuition that human persistence should involve some kind of psychological continuity. (shrink)

Thought experiments are a means of imaginative reasoning that lie at the heart of philosophy, from the pre-Socratics to the modern era, and they also play central roles in a range of fields, from physics to politics. The Routledge Companion to Thought Experiments is an invaluable guide and reference source to this multifaceted subject. Comprising over 30 chapters by a team of international contributors, the Companion covers the following important areas: -/- · the history of thought experiments, (...) from antiquity to the trolley problem and quantum non-locality; -/- · thought experiments in the humanities, arts, and sciences, including ethics, physics, theology, biology, mathematics, economics, and politics; -/- · theories about the nature of thought experiments; -/- · new discussions concerning the impact of experimental philosophy, cross-cultural comparison studies, metaphilosophy, computer simulations, idealization, dialectics, cognitive science, the artistic nature of thought experiments, and metaphysical issues. -/- This broad ranging Companion goes backwards through history and sideways across disciplines. It also engages with philosophical perspectives from empiricism, rationalism, naturalism, skepticism, pluralism, contextualism, and neo-Kantianism to phenomenology. This volume will be valuable for anyone studying the methods of philosophy or any discipline that employs thought experiments, as well as anyone interested in the power and limits of the mind. (shrink)

The behavior of an organism, according to Merleau-Ponty, lays out a milieu through which significant phenomena of varying degrees of optimality elicit adjustment. This leads to the dialectical co-emergence of milieu and aptitude that is both the product and the condition of life. What is present as a norm soliciting optimization is species-specific, but it also depends on the needs of the organism and its prior experience. Although a rich entry point into biological phenomenology, Merleau-Ponty’s work does not adequately describe (...) milieu–aptitude development in interactions between organisms, but it can be assisted through employing Husserl’s three levels of analysis identified by Steinbock, extending all three modes into the biological world. In particular, generative analyses can address inter-organismal behavioral structures slighted in Merleau-Ponty’s work. Generative phenomenology is concerned with the cultural, historical, and intersubjective constitution of human experience and is generally thought to be solely of value in examining the structure of human phenomenality. However, the possibility of human generativity presupposes structures produced widely in the biological world. Ecological, embryogenic, and evolutionary development already depend on protocultural and historical processes creating and created through intercorporeal interaction. After developing the concept of biological generativity through a consideration of plant ecology, mammalian embryology, and insect mimicry, I conclude with implications for humans, who can participate in biological generativity not merely phenomenally, but phenomenologically. (shrink)

In their paper, “Autonomy and the ethics of biological behaviour modification”, Savulescu, Douglas, and Persson discuss the ethics of a technology for improving moral motivation and behaviour that does not yet exist and will most likely never exist. At the heart of their argument sits the imagined case of a “moral technology” that magically prevents people from developing intentions to commit seriously immoral actions. It is not too much of a stretch, then, to characterise their paper as a thought (...) experiment in service of a thought experiment. In order for an argument involving a thought experiment to progress debate in applied ethics three things must be true. First, the thought experiment must accurately represent and illuminate a pressing ethical dilemma. Second – and most obviously – the central claims of the argument regarding the thought experiment must be plausible. Third, it must be possible to apply or develop the arguments established with reference to the thought experiment to the real world cases the experiment is intended to illuminate. In this commentary, I argue that there are serious reasons to question the extent to which their argument meets each of these challenges involved in the use of thought experiments in applied ethics. While Savulescu et al. succeed in showing how behavioural modification might be compatible with freedom and autonomy – and perhaps justifiable even if it were not — in the fantastic case they consider, there is little we can conclude from this about any technology of “moral bioenhancement” in the foreseeable future. Indeed, there is a real danger that their argument will license attempts to manipulate behaviour through drugs and brain implants, which raise profound moral issues that they barely mention. (shrink)

Philosophy and science employ abstract hypothetical scenarios- thought experiments - to illustrate, defend, and dispute theoretical claims. Since thought experiments furnish no new empirical observations, the method prompts two epistemological questions: whether anything may be learnt from the merely hypothetical, and, if so, how. Various sceptical arguments against the use of thought experiments in philosophy are discussed and criticized. The thesis that thought experiments in science provide a priori knowledge through non-sensory grasping of abstract entities is (...) discussed and rejected. The thesis that thought experimentation consists in manipulations of mental models is examined and found to be of limited epistemological relevance. It is argued that thought experiments are associated with characteristic arguments in a manner similar to ordinary experiments. It is further argued that thought experiments function in the same way as experiments in general: by providing premises for their associated arguments. Like other experiments, a thought experiment is successful when the premises it provides are true. This holds both for philosophical and scientific thought experiments. An argument schema is proposed and shown to be a formal analogue to that associated with ordinary experiments; similar in being subject to epistemological holism; but differing in being modal: in employing statements about possibility and necessity. The evaluation of thought experiments thus depends on how modal statements may be justified. Intuition and conceivability are discussed as sources of modal justification and found problematic. Instead it is suggested that evaluation proceed by accommodation of the statements describing the experiment's hypothetical scenario. The method of accommodation is developed and applied to five influential thought experiments in philosophy: the brain in a vat; Putnam's Twin Earth; Burge's arthritis example; Searle's Chinese Room; and Newcomb's problem. Its application shows some of these to be failed, others to be successful only relative to controversial philosophical doctrines. (shrink)

The ‘Fading Qualia’ thought experiment of Chalmers purports to show that computationalism is very probably true even if dualism is true by considering a series of brains, with biological parts increasingly substituted for by artificial but functionally analagous parts in small steps, and arguing that consciousness would not plausibly vanish in either a gradual or sudden way. This defense of computationalism inspired an attack on computationalism by Bishop, who argued that a similar series of substitutions by parts that (...) have the correct physical activity but not the correct causal relationships must likewise preserve consciousness, purportedly showing that ‘Counterfactuals Cannot Count’ and if so ruining a necessary condition for computation to meaningfully distinguish between physical systems. In this paper, the case in which a series of parts are simply removed and substituted for only by imposing the correct boundary conditions to exactly preserve the functioning of the remaining partial brain is described. It is argued that consciousness must gradually vanish in this case, not by fading but by becoming more and more partial. This supports the non-centralized nature of consciousness, tends to support the plausibility of physicalism against dualism, and provides the proper counterargument to Bishop’s contention. It also provides an avenue of attack against the “Fading Qualia” argument for those who remain dualists. (shrink)

Kripke argues for origin essentialism, the view that the same individual cannot have multiple origins. Sober hypothesises that Kripke's origin essentialism applies to biological species. This paper shows that Sober's hypothesis fails. Because Kripke's original argument is invalid, it cannot vindicate Sober's proposal. Salmon offers an influential reformulation of Kripke's argument but his argument fails to extend to species: the notion of an individual's origin is too narrow to apply to species, and Salmon's argument rests on a thought (...) class='Hi'>experiment that conflicts with how species evolve. Thus, Sober and others are wrong to think that Kripke's origin essentialism can save species essentialism. (shrink)

This volume addresses fundamental issues in the philosophy of science in the context of two most intriguing fields: biology and economics. Written by authorities and experts in the philosophy of biology and economics, Mechanism and Causality in Biology and Economics provides a structured study of the concepts of mechanism and causality in these disciplines and draws careful juxtapositions between philosophical apparatus and scientific practice. By exploring the issues that are most salient to the contemporary philosophies of (...) class='Hi'>biology and economics and by presenting comparative analyses, the book serves as a platform not only for gaining mutual understanding between scientists and philosophers of the life sciences and those of the social sciences, but also for sharing interdisciplinary research that combines both philosophical concepts in both fields. -/- The book begins by defining the concepts of mechanism and causality in biology and economics, respectively. The second and third parts investigate philosophical perspectives of various causal and mechanistic issues in scientific practice in the two fields. These two sections include chapters on causal issues in the theory of evolution; experiments and scientific discovery; representation of causal relations and mechanism by models in economics. The concluding section presents interdisciplinary studies of various topics concerning extrapolation of life sciences and social sciences, including chapters on the philosophical investigation of conjoining biological and economic analyses with, respectively, demography, medicine and sociology. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Learning Music:Embodied Experience in the Life-WorldEva Alerby and Cecilia FermIn the present age, which is often signified as post-modern or knowledge-intensive, the calls for learning echo loud. Discussions of learning, as well as teaching, permeate almost all levels and arenas of our society, and have a sure place in every-day conversation as well as scientific debate. The concept of learning can be understood and explained in many different ways. (...) Our intention in this article is to make visible and discuss how learning music can be understood and explained from a life-world approach.By life-world approach we mean that learning is constituted by the experiences that we are having in the world. From that perspective it can be seen as a process which leads to some kind of change, whose utmost purpose is—consciously or unconsciously—to create meaning and make managing the world possible. In addition, we stress that learning does not arise nor is formed in a vacuum, but instead is found in complex contexts. In turn this creates the necessity of making learning situated and contextualized.1How one understands how music is learned is consequently influenced not only by what fundamental assumptions one holds about learning but also by prevailing views of music. Furthermore, how musical ability is regarded and whether musicality is accepted as an emotional or cognitive phenomenon is also [End Page 177] important. Other assumptions that need to be considered are whether or not it is possible to divide musicality into smaller parts and if that is the case, what is the relationship between these parts. One further question that has to be illuminated is the question about biological and social influences on musicality.2 According to Sture Brändström,3 musicality is sometimes divided into two categories—absolute contra relativistic musicality. The first category implies that musicality is regarded as a native ability, already existing within the human being, an ability that some people have and others lack. The second category reflects an approach that assumes that musicality is something everybody can acquire, it can be learned and appropriated. We will return later to this issue.These questions reveal a dualistic approach, specifically: whether musicality is an emotional or a cognitive phenomenon, or absolute or relative, which in turn leads to the question of whether or not learning music is constituted within or outside the human being. To expose problems related to this dualistic approach in music education, we will examine musical learning using life-world phenomenology as a theoretical framework, a brief description of which follows.Phenomenology: A Way of ThinkingAt the turn into the twentieth century, the German philosopher, Edmund Husserl (1859-1938), named his philosophical approach phenomenology, and with that the development of modern phenomenology began. Phenomenology is both a method and a way of thought.4 He distinguished the fundamental principle of phenomenology as—'back to the things themselves.' According to Husserl it is through experiences that we gain access to things themselves. The concept of experience was essential to his formulation, and it became a key signature for the whole of phenomenology. His starting-point was how the world is experienced in a subjective way, and the aim was to find a way to describe the meaning of these subjective experiences. In other words, phenomenology has been summarized as a description of how the world is experienced by the person in the world.Various thinkers have interpreted phenomenology in different ways. Jan Bengtsson5 emphasized that phenomenological method should be named in the plural as methods. The phenomenology of the life-world, which was developed as an alternative to the so-called epoché, the special method of transcendental phenomenology, is a philosophy of the life-world without transcendental reduction. It is the life-world that constitutes the basis of our lives. It is the everyday world of our experiences, which we take for granted and where we live our lives. In other words it is the life-world that constitutes people's being-in-the-world.6 Through our existence we experience the concrete world in all its complexity, which is both historically and contextually dependent. Consequently... (shrink)

The first organic robots built by Tuft and Vermont University researchers pose questions to philosophy and give it a new task. The xenobots embody what phi-losophers had attempted to define as teleology. This paper addresses the way te-los can be redefined, once liberated from the suspicion of vitalism. While Darwin-ism, through a theory of evolution based on the environment, has contributed to the elimination of telos, here a new view of biology is described, which shows how evolution can be (...) fully explained through the notion of feedback, or inner re-sistance in a system, as preliminary condition for natural selection to work. (shrink)

Prof. Miščević has long been an ardent defender of the use of thought experiments in philosophy, foremost metaphysics, epistemology and philosophy of mind. Recently he has, in his typically sophisticated manner, extended his general account of philosophical thought-experimenting to the domain of normative politics. Not only can the history of political philosophy be better understood and appreciated, according to Miščević, when seen as a more or less continuous, yet covert, practice of thought-experimenting, the very progress of the (...) discipline may crucially depend on finding the right balance between the constraints of (biological, psychological, economic, political, and so on) reality and political-moral ideals when we set to design our basic political notions and institutions. I have much less confidence in this project than prof. Miščević does. As a subspecies of moral TE, political TE share all their problems plus exhibit some of their own. In the paper, I present and discuss two types of evidence that threaten to undermine political philosophers’ trust in thought-experiments and the ethical/political intuitions elicited by them: (i) the dismal past record of thought-experimentation in moral and political philosophy; and (ii) the variety, prevalence, and stubbornness, of bias in ordinary social/political judgment. (shrink)

By 1900 most biologists accepted experimentation as appropriate for at least parts of biology. Some claimed experimentation as the best or only proper approach to biology, while others regarded it as an acceptable addition to existing methodologies. Different researchers defined experimentation in different ways, and they held different aspirations for their experimental programs. This paper explores three sets of ideas, represented respectively by the French in the 1870s, the Germans in the 1880s, and the Americans in the 1890s. (...) It examines what an experiment was thought to be, what experimentation was, and what the goals of experimentation were for each group, revealing suggestive differences. (shrink)

In his historical perspective on the changes in scientific thought over the last 100 years, Carl N. Degler explores the study of social evolution and the ongoing search for human nature. In Search of Human Nature provides a detailed perspective on the reasons behind the shifting emphasis in social thought from biology, to culture, and again to biology. Degler examines why these changes took place, the evidence and people fostering these changes and why students of human (...) nature decided to accept this momentous change in thought. He suggests varying ideologies as the underlying force behind this shift in the study of social science. From Darwin's theory that human social behaviour has drastically evolved from animals, to the belief that human experience serves as the basic differentiating factor in humans, Degler provides a thorough and captivating examination of the roots of human behaviour. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Learning Music:Embodied Experience in the Life-WorldEva Alerby and Cecilia FermIn the present age, which is often signified as post-modern or knowledge-intensive, the calls for learning echo loud. Discussions of learning, as well as teaching, permeate almost all levels and arenas of our society, and have a sure place in every-day conversation as well as scientific debate. The concept of learning can be understood and explained in many different ways. (...) Our intention in this article is to make visible and discuss how learning music can be understood and explained from a life-world approach.By life-world approach we mean that learning is constituted by the experiences that we are having in the world. From that perspective it can be seen as a process which leads to some kind of change, whose utmost purpose is—consciously or unconsciously—to create meaning and make managing the world possible. In addition, we stress that learning does not arise nor is formed in a vacuum, but instead is found in complex contexts. In turn this creates the necessity of making learning situated and contextualized.1How one understands how music is learned is consequently influenced not only by what fundamental assumptions one holds about learning but also by prevailing views of music. Furthermore, how musical ability is regarded and whether musicality is accepted as an emotional or cognitive phenomenon is also [End Page 177] important. Other assumptions that need to be considered are whether or not it is possible to divide musicality into smaller parts and if that is the case, what is the relationship between these parts. One further question that has to be illuminated is the question about biological and social influences on musicality.2 According to Sture Brändström,3 musicality is sometimes divided into two categories—absolute contra relativistic musicality. The first category implies that musicality is regarded as a native ability, already existing within the human being, an ability that some people have and others lack. The second category reflects an approach that assumes that musicality is something everybody can acquire, it can be learned and appropriated. We will return later to this issue.These questions reveal a dualistic approach, specifically: whether musicality is an emotional or a cognitive phenomenon, or absolute or relative, which in turn leads to the question of whether or not learning music is constituted within or outside the human being. To expose problems related to this dualistic approach in music education, we will examine musical learning using life-world phenomenology as a theoretical framework, a brief description of which follows.Phenomenology: A Way of ThinkingAt the turn into the twentieth century, the German philosopher, Edmund Husserl (1859-1938), named his philosophical approach phenomenology, and with that the development of modern phenomenology began. Phenomenology is both a method and a way of thought.4 He distinguished the fundamental principle of phenomenology as—'back to the things themselves.' According to Husserl it is through experiences that we gain access to things themselves. The concept of experience was essential to his formulation, and it became a key signature for the whole of phenomenology. His starting-point was how the world is experienced in a subjective way, and the aim was to find a way to describe the meaning of these subjective experiences. In other words, phenomenology has been summarized as a description of how the world is experienced by the person in the world.Various thinkers have interpreted phenomenology in different ways. Jan Bengtsson5 emphasized that phenomenological method should be named in the plural as methods. The phenomenology of the life-world, which was developed as an alternative to the so-called epoché, the special method of transcendental phenomenology, is a philosophy of the life-world without transcendental reduction. It is the life-world that constitutes the basis of our lives. It is the everyday world of our experiences, which we take for granted and where we live our lives. In other words it is the life-world that constitutes people's being-in-the-world.6 Through our existence we experience the concrete world in all its complexity, which is both historically and contextually dependent. Consequently... (shrink)

Despite their centrality and importance to both science and philosophy, relatively little has been written about thought experiments. This volume brings together a series of extremely interesting studies of the history, mechanics, and applications of this important intellectual resource. A distinguished list of philosophers and scientists consider the role of thought experiments in their various disciplines, and argue that an examination of thought experimentation goes to the heart of both science and philosophy.

Much of the recent movement organized under the heading “Experimental Philosophy” has been concerned with the empirical study of responses to thought experiments drawn from the literature on philosophical analysis. I consider what bearing these studies have on the traditional projects in which thought experiments have been used in philosophy. This will help to answer the question what the relation is between Experimental Philosophy and philosophy, whether it is an “exciting new style of [philosophical] research”, “a new interdisciplinary (...) field that uses methods normally associated with psychology to investigate questions normally associated with philosophy” (Knobe et al. 2012), or whether its relation to philosophy consists, as some have suggested, in no more than the word ‘philosophy’ appearing in its title, or whether the truth lies somewhere in between these two views. I first distinguishes different strands in Experimental Philosophy, negative and positive x-phi, and x-phi pursuing philosophy as opposed to x-phi as cognitive science. Next I review some ways in which Experimental Philosophy has been criticized. Finally, I consider what would have to be true for Experimental Philosophy to have one or another sort of relevance to philosophy, whether the assumptions required are true, how we could know it, and the ideal limits of the usefulness Experimental Philosophy to philosophy. I conclude x-phi cannot in principle be a replacement for traditional first person approaches because it yields the wrong kind of knowledge and that it can nonetheless be a practical aid in conducting philosophical thought experiments. n. (shrink)

The purpose of this chapter is to provide a guide for conducting thought experiments in epistemology effectively. The guide raises several considerations for best practices when using this research method. Several weaknesses in the way thought experiments are conducted are also identified and several suggestions are reviewed for how to improve them. Training in these research techniques promotes more productive scholarship in epistemology, saves time and resources wasted on less efficient approaches, and reduces the risk that researchers are (...) fooling themselves when they use thought experiments in philosophy. (shrink)

Preface: This volume originated in a conference on "The Place of Thought Experiments in Science and Philosophy" which was organized by us and held at the Center for Philosophy of Science at the University of Pittsburgh, April 18-20, 1986. The idea behind this conference was to encourage philosophers and scientists to talk to each other about the role of thought experiments in their various disciplines. These papers were either written for the conference, or were written after it by (...) commentators and other participants.... We hope that this volume will be of use to other philosophers and scientists who are interested in thought experiments, as well as inspire more work in this area.... (shrink)

This chapter suggests a scheme of reconstruction, which explains how scenarios, questions and arguments figure in thought experiments. It then develops a typology of ethical thought experiments according to their function, which can be epistemic, illustrative, rhetorical, heuristic or theory-internal. Epistemic functions of supporting or refuting ethical claims rely on metaethical assumptions, for example, an epistemological background of reflective equilibrium. In this context, thought experiments may involve intuitive as well as explicitly argued judgements; they can be used (...) to generate moral commitments, to explore consequences of moral theories, and to show inconsistencies within or between moral commitments and moral theory; but the results of thought experiments by themselves do not settle what is epistemically justified and may also be rejected. Finally, some prominent challenges are discussed: do unrealistic scenarios undermine epistemic thought experiments? Are ethical thought experiments misleading? Do they rely on weak analogies? Are there specifically moral objections to ethical thought experiments? (shrink)

Ullin Thomas Place died on 2nd January 2000 at the age of seventy-five. I had met him a little over three years earlier, in November 1996, during the annual 'Mind and Brain' symposium organized by Peter Fenwick and held at the Institute of Psychiatry in London. At that meeting Professor Place delivered a slightly shortened version of the paper reproduced here, in which he told his personal story — a pilgrim's progress? — recounting, as he put it, 'the history of (...) a thought process leading from an adolescent interest in mystical experience to an article entitled‘Is consciousness a brain process?’[Place, 1956] in which I argued for an affirmative answer to that question'. (shrink)

Although thought experiments were first discovered as a sui generis methodological tool by philosophers of science (most prominently by Ernst Mach), the tool can also be found – even more frequently – in contemporary philosophy. Thought experiments in philosophy and science have a lot in common. However, in this chapter we will concentrate on thought experiments in philosophy only. Their use has been the centre of attention of metaphilosophical discussion in the past decade, and this chapter will (...) provide an overview of the results this discussion has achieved and point out which issues are still open. (shrink)

In a thought experiment we want to test how the emergence of adult neural stem cells could constitute an example for a scientific revolution in the sense of Thomas Kuhn. In his major work, The structure of scientific revolutions, 3rd edn, University of Chicago Press, Chicago (Kuhn 1996), the philosopher of science, Thomas Kuhn, states that scientific progress is not a cumulative process, but new theories appear by a rather revolutionary sequence of events. Kuhn built his theory on (...) landmark events taken from chemistry and physics, lacking examples from biology. Beginning with Ramon y Cajal’s famous quote, no new neurons after birth , from the early years of the twentieth century, and Reynolds and Weiss’s conflicting finding in 1992 of adult neural stem cells giving rise to new neurons, we will test how the finding of neural stem cells in the adult brain matches with Kuhn’s theory. The pivotal problem of defining a paradigm will be our main focus, since the emergence of adult neural stem cells has been acclaimed by the scientific community as the rebuttal of Ramon y Cajal’s paradigm. (shrink)

Thought experiments being central to contemporary philosophy and science, the following questions were asked in recent literature. What is their definition? Are they heuristic devices, arguments, paradoxes? Are they comparable to real experiments? Do intuition and conceivability intervene? Equally imaginative thought experiments are found in ancient, medieval, and Renaissance texts. Paying attention to prime historical examples of thought experiments, we show that historical perspectives help answer these general questions.

The paper addresses the question of the nature and limits of philosophical thought experiments. On the one hand, experimental philosophers are right to claim that we need much more laboratory work in order to have more reliable thought experiments, but on the other hand a naturalism that is too radical is incapable of clarifying the peculiarity of thought experiments in philosophy. Starting from a historico-critical reconstruction of Kant’s concept of the “experiments of pure reason”, this paper outlines (...) an account of thought experiments in philosophy that tries to reconcile the thesis of a principled difference between scientific and philosophical TEs with the position of a methodological naturalism that does not admit any difference in kind between the methods of science and of philosophy. (shrink)

The paper addresses the question of the nature and limits of philosophical thought experiments. On the one hand, experimental philosophers are right to claim that we need much more laboratory work in order to have more reliable thought experiments, but on the other hand a naturalism that is too radical is incapable of clarifying the peculiarity of thought experiments in philosophy. Starting from a historico-critical reconstruction of Kant’s concept of the “experiments of pure reason”, this paper outlines (...) an account of thought experiments in philosophy that tries to reconcile the thesis of a principled difference between scientific and philosophical TEs with the position of a methodological naturalism that does not admit any difference in kind between the methods of science and of philosophy. (shrink)

Roy Sorensen advances an evolutionary explanation of our capacity for thought experiments which doubles as a naturalized epistemological justification. I argue Sorensens explanation fails to satisfy key elements of environmental-selectionist explanations and so fails to carry epistemic force. I then argue that even if Sorensen succeeds in showing the adaptive utility of our capacity, he still fails to establish its reliability and hence epistemic utility. I conclude Sorensens account comes to little more than a just-so story.

In this paper I examine the role of thought experiments in the social studies of science. More specifically, I will focus on two strands of social studies of science: the so-called sociology of scientific knowledge and the naturalistically oriented philosophy of science with interest in social dimensions of science. I begin by discussing David Hull's views on thought experiments in the study of science. His account serves as a foil that helps me to make some points about (...) class='Hi'>thought experiments. As an illustration I discuss two example of thought experimenting in the social studies of science. The first example is the use of thought experiments by the sociologists of scientific knowledge, and the second case will be the recent work by Philip Kitcher on division of cognitive labour. With the help of these cases, I argue that Hull's negative attitude towards the use of thought experiments requires some, tempering. The notion of thought experiment will be understood broadly in this paper. One could also talk about imaginary or hypothetical examples. In social sciences the contrast for thought experiments is not an experiment, but an empirical case study. Accordingly, thought experiment in social science in an imaginary case study or a made up historical scenario. The focus of my discussion is on the various functions and argumentative roles thought experiments have or could have in social studies of science. An empirical experiment (or a case study) is not an argument by itself, nor is a thought experiment. However, they both are used in making arguments and my aim is to look how they are used. (shrink)

We present a criterion for the use of thought experiments as a guide to possibilia that bear on important arguments in philosophy of religion. We propose that the more successful thought experiments are closer to the world in terms of phenomenological realism and the values they are intended to track. This proposal is filled out by comparing thought experiments of life after death by Peter van Inwagen and Dean Zimmerman with an idealist thought experiment. In (...) terms of realism and values we contrast an exemplary thought experiment by Iris Murdoch with one we find problematic by William Irwin. (shrink)

Thought Experiments in Ethics, 2021 CONTENTS Preface i Chapter I The Story in Your Head: Tomoceuszkakatiti and Gyugyu 1 Chapter II How Thought Experiments Move Us: The Samaritan and His Neighbours 16 Chapter III What Makes a Thought Experiment? 34 Chapter IV Thought Experiments in Practical Philosophy and Bioethics 75 Chapter V The Experience Machine 93 Chapter VI The Last Man Argument 129 Chapter VII The Trolley Problem 158 Chapter VIII The Violinist Analogy 213 Conclusion (...) 246 Notes 248. (shrink)

Most disciplines make use of thought experiments, but physics and philosophy lead the pack with heavy dependence upon them. Often this is for conceptual clarification, but occasionally they provide real theoretical advances. In spite of their importance, however, thought experirnents have received rather little attention as a topic in their own right until recently. The situation has improved in the past few years, but a mere generation ago the entire published literature on thought experiments could have been (...) mastered in a long weekend. Now the subject is beginning to flourish. Given the relative newness of the field, it might be useful to have several examples at one’s finger tips, so a number of great ones will be described. Attention will also be drawn outside physics and philosophy. In mathematics there is something analogous to thought experiments -- visual reasoning and picture proofs. I will look briefly at this class of thought experiments and try using them to make a case for possibly settling the continuum hypothesis. After this, I will return to thought experiments in the sciences and propose an account of how they work. Finally, I will end with a sketch of a topic I am currently working on, a kind of progress report which, I hope, will be an inducement to others. (shrink)

In the burgeoning literature on thought experiments, examples are drawn from almost all areas of philosophy, one exception, however, being aesthetics. There are good reasons why this is so: there are very few interesting theory-oriented thought experiments in aesthetics, which is unsurprising since there are few well-developed theories to test in this field. After evaluating some aesthetic thought experiments in light of some general epistemic questions regarding thought experiments, we argue that theory-centred thought experiments are (...) not the only kinds of thought experiments, and that the practical and productive thought experiments that are prevalent in aesthetics are also worthy of some attention. (shrink)

Wittgensteinian ethics, it may be thought, is committed to detailed examination of realistically described cases, and hence to eschewing the abstract hypothetical cases, many of them quite bizarre, found in much contemporary moral theorizing. I argue that bizarre cases may be helpful in thinking about ethics, and that there is nothing in Wittgenstein's approach to philosophy that would go against this. I examine the case of the ring of Gyges from the Republic; and I consider also some contemporary arguments (...) about thought-experiments in philosophy. (shrink)

In a recent series of papers, Beck and Wagner have been arguing about the general role that thought experiments can play in the debate on personal identity, showing their disagreement about the famous criticisms that Wilkes’ launched against their use. In this article I come back to Wilkes’ criticisms to show that her position is deeply problematic. If we adopt instead the mental model account of thought experiments, we can accommodate Wilkes’ criticisms and justify the use of (...) class='Hi'>thought experiments in the debate of personal identity. This will allow us to see why Beck and Wagner were both half right and half wrong in their discussion. (shrink)

In the burgeoning literature on thought experiments (e.g., Cohen 2005; Freese 1995; Gendler 2000; Häggqvist 1996, 2009; Ierodiakonou and Roux 2011; Sorensen 1992), examples are drawn from almost all areas of philosophy. One exception, however, is aesthetics. There are good reasons why this is so: there are very few interesting theory‐ oriented thought experiments in aesthetics, which is unsurprising since there are few well‐developed theories to test in this field (see Chapter 34, Applied Aesthetics). We argue in this (...) chapter, however, that theory‐centered thought experiments are not the only kinds of thought experiments, and that the practical and productive thought experiments that are prevalent in aesthetics are also worthy of some attention. The outline of this chapter is as follows. First we describe in some detail the single most influential theoretical thought experiment in aesthetics. We assess this experiment in epistemic terms, and with this case in view discuss the distinction between theoretical and practical or productive thought experiments. Examples of the latter are introduced so as to illustrate the importance of that distinction. (shrink)

From Lucretius throwing a spear beyond the boundary of the universe to Einstein racing against a beam of light, thought experiments stand as a fascinating challenge to the necessity of data in the empirical sciences. Are these experiments, conducted uniquely in our imagination, simply rhetorical devices or communication tools or are they an essential part of scientific practice? This volume surveys the current state of the debate and explores new avenues of research into the epistemology of thought experiments.

This article suggests that ?evolutionary vision,? the unifying paradigm of physical, biological, and sociocultural evolution, needs to be fully embodied and deeply experienced in the human being, and that this can be effected by the experience at the heart of the ?perennial wisdom tradition,? 1 that is, that of ?non-dual perception.? The article suggests an ?action-based? experiment paralleling the method of a ?thought experiment,? based on the assumption that one way that one can experience this embodiment is (...) by ?trying on? the lens of non-dual perception, as practiced by the many traditions of perennial wisdom. (shrink)

The study begins with the language employed in and the psychological basis of thought experiments as understood by certain medieval Arabic philosophers. It then provides a taxonomy of different kinds of thoughts experiments used in the medieval Islamic world. These include purely fictional thought experiments, idealizations and finally thought experiments using ingenious machines. The study concludes by suggesting that thought experiments provided a halfway house during this period between a staunch rationalism and an emerging empiricism.