Newton urged scientists never to speculate, only to prove by establishing experimental facts. By contrast, Einstein urged scientists to speculate freely, since only daring speculations, not experimental facts, can advance science. Who, if either, is right? Is speculation a legitimate part of science, even in the absence of testing? If so, can speculations be evaluated without testing? How? To answer these questions it must first be determined what counts as a speculation, a task not usually investigated by those who express strong views about speculation. In Speculation, Peter Achinstein develops the basic idea that speculating involves introducing assumptions, under certain "theorizing" conditions, without knowing that there is evidence for those assumptions. This idea is made precise by utilizing a concept of "evidence" Achinstein has introduced in previous writings and also explains here. With this concept, Achinstein defends a view according to which, by contrast with Newton, speculations are crucial in science, and by contrast with Einstein, they are subject to constraints. The latter include pragmatic ones, reflecting the particular aims of the scientist in speculating, and epistemic ones that are subject to a different standard then "evidence sufficient for belief." This viewpoint is illustrated and evaluated by critically examining historical and contemporary speculations in fundamental physics as well as more general speculations within or about science, including these: nature is simple, and simplicity is a sign of truth (Newton, Einstein); a theory can only be tested "holistically" (Duhem and Quine); and there is, and must be, a "Theory of Everything" (string theorists and reductionists).

Speculation: Within and About Science

Politics & Social Sciences

Achinstein, Peter

Philosophy

Oxford University Press

Offering a new approach to scientific explanation, this book focuses initially on the explaining act itself. From that act, a "product" emerges: an explanation. To understand what that product is, as well as how it can be evaluated in the sciences, reference must be made to the concept of the explaining act. Following an account of the explaining act, its product, and the evaluation of explanations, the theory is brought to bear on these issues: Why have the standard models of scientific explanation been unsuccessful, and can there be a model of the type sought? What is causal explanation, and must explanation in the sciences be causal? What is a functional explanation? The "illocutionary" theory of explanation developed at the outset is used in discussing these issues, and contrasting philosophical viewpoints are assessed.

The Nature of Explanation

History

Europe

Offering a new approach to scientific explanation, this book focuses initially on the explaining act itself. From that act, a "product" emerges: an explanation. To understand what that product is, as well as how it can be evaluated in the sciences, reference must be made to the concept of the explaining act. Following an account of the explaining act, its product, and the evaluation of explanations, the theory is brought to bear on these issues: Why have the standard models of scientific explanation been unsuccessful, and can there be a model of the type sought? What is causal explanation, and must explanation in the sciences be causal? What is a functional explanation? The "illocutionary" theory of explanation developed at the outset is used in discussing these issues, and contrasting philosophical viewpoints are assessed.

Particles and Waves: Historical Essays in the Philosophy of Science

This volume brings together eleven essays by the distinguished philosopher of science, Peter Achinstein. The unifying theme is the nature of the philosophical problems surrounding the postulation of unobservable entities such as light waves, molecules, and electrons. How, if at all, is it possible to confirm scientific hypotheses about "unobservables"? Achinstein examines this question as it arose in actual scientific practice in three nineteenth-century episodes: the debate between particle and wave theorists of light, Maxwell's kinetic theory of gases, and J.J. Thomson's discovery of the electron. The book contains three parts, each devoted to one of these topics, beginning with an essay presenting the historical background of the episode and an introduction to the philosophical issues. There is an illuminating evaluation of various scientific methodologies, including hypothetico-deductivism, inductivism, and the method of independent warrant which combines features of the first two. Achinstein assesses the philosophical validity of both nineteenth-century and modern answers to questions about unobservables, and presents and defends his own solutions.

Science & Math

This volume brings together eleven essays by the distinguished philosopher of science, Peter Achinstein. The unifying theme is the nature of the philosophical problems surrounding the postulation of unobservable entities such as light waves, molecules, and electrons. How, if at all, is it possible to confirm scientific hypotheses about "unobservables"? Achinstein examines this question as it arose in actual scientific practice in three nineteenth-century episodes: the debate between particle and wave theorists of light, Maxwell's kinetic theory of gases, and J.J. Thomson's discovery of the electron. The book contains three parts, each devoted to one of these topics, beginning with an essay presenting the historical background of the episode and an introduction to the philosophical issues. There is an illuminating evaluation of various scientific methodologies, including hypothetico-deductivism, inductivism, and the method of independent warrant which combines features of the first two. Achinstein assesses the philosophical validity of both nineteenth-century and modern answers to questions about unobservables, and presents and defends his own solutions.

Literature & Fiction

World Literature

What is required for something to be evidence for a hypothesis? In this fascinating, elegantly written work, distinguished philosopher of science Peter Achinstein explores this question, rejecting typical philosophical and statistical theories of evidence. He claims these theories are much too weak to give scientists what they want--a good reason to believe--and, in some cases, they furnish concepts that mistakenly make all evidential claims a priori. Achinstein introduces four concepts of evidence, defines three of them by reference to "potential" evidence, and characterizes the latter using a novel epistemic interpretation of probability. The resulting theory is then applied to philosophical and historical issues. Solutions are provided to the "grue," "ravens," "lottery," and "old-evidence" paradoxes, and to a series of questions. These include whether explanations or predictions furnish more evidential weight, whether individual hypotheses or entire theoretical systems can receive evidential support, what counts as a scientific discovery, and what sort of evidence is required for it. The historical questions include whether Jean Perrin had non-circular evidence for the existence of molecules, what type of evidence J. J. Thomson offered for the existence of the electron, and whether, as is usually supposed, he really discovered the electron. Achinstein proposes answers in terms of the concepts of evidence introduced. As the premier book in the fabulous new series Oxford Studies in Philosophy of Science, this volume is essential for philosophers of science and historians of science, as well as for statisticians, scientists with philosophical interests, and anyone curious about scientific reasoning.

The Book of Evidence (Oxford Studies in the Philosophy of Science)

History & Philosophy

What is required for something to be evidence for a hypothesis? In this fascinating, elegantly written work, distinguished philosopher of science Peter Achinstein explores this question, rejecting typical philosophical and statistical theories of evidence. He claims these theories are much too weak to give scientists what they want--a good reason to believe--and, in some cases, they furnish concepts that mistakenly make all evidential claims a priori. Achinstein introduces four concepts of evidence, defines three of them by reference to "potential" evidence, and characterizes the latter using a novel epistemic interpretation of probability. The resulting theory is then applied to philosophical and historical issues. Solutions are provided to the "grue," "ravens," "lottery," and "old-evidence" paradoxes, and to a series of questions. These include whether explanations or predictions furnish more evidential weight, whether individual hypotheses or entire theoretical systems can receive evidential support, what counts as a scientific discovery, and what sort of evidence is required for it. The historical questions include whether Jean Perrin had non-circular evidence for the existence of molecules, what type of evidence J. J. Thomson offered for the existence of the electron, and whether, as is usually supposed, he really discovered the electron. Achinstein proposes answers in terms of the concepts of evidence introduced. As the premier book in the fabulous new series Oxford Studies in Philosophy of Science, this volume is essential for philosophers of science and historians of science, as well as for statisticians, scientists with philosophical interests, and anyone curious about scientific reasoning.

The Book of Evidence (Oxford Studies in Philosophy of Science)

Law and Explanation: An Essay in the Philosophy of Science

This anthology presents work on major topics surrounding the concept of evidence as employed in the empirical sciences. Focusing on the "classificatory" concept of evidence rather than the quantitative "degree of confirmation," the selections include Carl G. Hempel's satisfaction definition, R.B. Braithwaite's hypothetic-deductive view, N.R. Hanson's account of retroduction, Nelson Goodman's entrenchment theory, probability definitions discussed by Rudolf Carnap and Wesley Salmon, Clark Glymour's bootstrap theory, and a view of Achinstein's that combines probability and explanation.

The Concept of Evidence (Oxford Readings in Philosophy)

The essays in this volume address three fundamental questions in the philosophy of science: What is required for some fact to be evidence for a scientific hypothesis? What does it mean to say that a scientist or a theory explains a phenomenon? Should scientific theories that postulate "unobservable" entities such as electrons be construed realistically as aiming to correctly describe a world underlying what is directly observable, or should such theories be understood as aiming to correctly describe only the observable world? Distinguished philosopher of science Peter Achinstein provides answers to each of these questions in essays written over a period of more than 40 years. The present volume brings together his important previously published essays, allowing the reader to confront some of the most basic and challenging issues in the philosophy of science, and to consider Achinstein's many influential contributions to the solution of these issues. He presents a theory of evidence that relates this concept to probability and explanation; a theory of explanation that relates this concept to an explaining act as well as to the different ways in which explanations are to be evaluated; and an empirical defense of scientific realism that invokes both the concept of evidence and that of explanation.

Evidence, Explanation, and Realism: Essays in Philosophy of Science

See the best price to sell, buy, or rent books by Achinstein, Peter. BookScouter helps to compare book prices from 25+ online bookstores and 30+ buyback vendors with a single search.

Books by Achinstein, Peter

See the best price to sell, buy, or rent books by Achinstein, Peter. BookScouter helps to compare book prices from 25+ online bookstores and 30+ buyback vendors with a single search.

Speculation: Within and About Science

The Nature of Explanation

The Nature of Explanation

Particles and Waves: Historical Essays in the Philosophy of Science

Particles and Waves: Historical Essays in the Philosophy of Science

The Book of Evidence (Oxford Studies in the Philosophy of Science)

The Book of Evidence (Oxford Studies in Philosophy of Science)

Law and Explanation: An Essay in the Philosophy of Science

The Concept of Evidence (Oxford Readings in Philosophy)

Evidence, Explanation, and Realism: Essays in Philosophy of Science