[N]o consensus... exists among physicists about how to understand quantum theory. There... is no precise, exact physical theory... Instead there is raging controversy. ...How can the manifest and overwhelming success ...be reconciled with complete uncertainty about what the theory claims about the nature of matter?
American philosopher of science (born 1958)
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The scientific realist maintains that in at least some cases, we have good evidential reasons to accept theories or theoretical claims as true, or approximately true, or on-the-road-to-truth. The scientific antirealist denies this. These attitudes come in degrees... [T]his is a question addressed by epistemology and confirmation theory...
Present physics elucidates the "motion" of an object as its trajectory through space-time. A precise understanding... requires a precise account of the structure of space-time. The nature of space-time itself... is the topic of the companion volume... Philosophy of Physics: Space and Time. The present volume addresses the question: What is matter? ...Our main task is to understand just what quantum theory claims about the nature of the material constituents of the world.
John Stewart Bell made a proposal... which he called the theory of local beables. "Beables" refers to the ontology of a theory: what it postulates to exist. "Local" indicates a beable that exists in a small region of space-time... What one needs... is an inventory of local beables and an account of their dynamics: how they get distributed in space-time.