The Book of Evidence

Abstract

Abstract What is required for a fact to be evidence for a hypothesis? In this book Achinstein introduces four concepts of evidence, which he calls potential, veridical, epistemic‐situation, and subjective. He defines the last three by reference to the first, and then characterizes potential evidence using a new objective epistemic interpretation of probability. The resulting theory is used to provide solutions to four ”paradoxes of evidence” (grue, ravens, lottery, and old evidence) and to a series of questions, including whether explanations or predictions furnish more evidential weight; whether individual hypotheses or only entire theoretical systems can receive evidential support (the Duhem‐Quine problem); and what counts as a scientific discovery and what evidence it requires. Two historical scientific cases are examined using the theory of evidence developed: Jean Perrin's argument for molecules (did he have noncircular evidence for their existence?), and J.J. Thomson's argument for electrons (what sort of evidence did this argument provide?).

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