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By Steven French

In The constitution of the World, Steven French articulates and defends the daring declare that there are not any objects. on the so much basic point, smooth physics provides us with an international of structures and making feel of that view is the significant target of the more and more frequent place referred to as structural realism. Drawing on modern paintings in metaphysics and philosophy of technological know-how, in addition to the 'forgotten' background of structural realism itself, French makes an attempt to extra floor and strengthen this place. He argues that structural realism bargains the way of balancing our have to accommodate the result of glossy technological know-how with our wish to arrive at an adequately expert knowing of the realm that technological know-how offers to us. protecting not just the realism-antirealism debate, the character of illustration, and the connection among metaphysics and technology, The Structure of the World defends a kind of eliminativism approximately items that units legislation and symmetry ideas on the center of ontology. in preference to a global of microscopic items banging into each other and ruled by means of the legislation of physics, it deals an international of legislation and symmetries, on which determinate actual houses are established. In featuring this account, French additionally tackles the excellence among mathematical and actual constructions, the character of legislation, and causality within the context of recent physics, and he concludes by way of exploring the level to which structural realism may be prolonged into chemistry and biology.

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Extra resources for The Structure of the World: Metaphysics and Representation

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The idea behind the general rule is simple. If the fundamental laws can’t be formulated without implicitly referring to some structure, then that’s a reason to think the structure represents real features in the world. For the laws presuppose the structure; they require it in order to be true. If the laws can be formulated without some structure, then that’s a reason to think it is excess, superfluous structure; an artifact of the formalism, not something in the world . . More generally, a match in structure between the dynamical laws and the world is evidence that we have inferred the correct structure to a world governed by those laws’ (North 2013).

But now consider this: suppose we were to evaluate these formulations from a perspective reached after the relevant developments have taken place. Looking back, of course the promise of one over the other may become clear but, equally, the relevant developments will also be clear, as will the new theory led to by these heuristic moves. In this situation, there will no longer be any underdetermination, because theoretical developments have effectively made the choice for us. Of course, in the case of the Lagrangian and Hamiltonian formulations, one can justifiably claim that each demonstrated a degree of fruitfulness, and the relevant elements an associated degree of plasticity, so in this case one can’t even make a retrospective determination.

Consider Dirac’s equation for the relativistic behaviour of an electron, from which spin emerges through the union of quantum mechanics and relativity theory. As is well known, the equation has positive and negative energy solutions. 9 8 Jumping ahead to the discussion in Chapter 5 one can characterize this notion of surplus structure as follows: we take the empirical sub-structures (representing the phenomena) to be embedded in theoretical structures, and the latter are understood to be related via partial homomorphisms to the relevant mathematical structures, which are related in turn to further structures which are then open to physical interpretation and hence being related to an extension of the theory, or a new theory entirely (Bueno, French, and Ladyman 2003).

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