Christopher Norris

This essay examines some of the arguments in David Deutsch's book The Fabric of Reality , chief among them its case for the so-called many-universe interpretation of quantum mechanics (QM), presented as the only physically and logically consistent solution to the QM paradoxes of wave/particle dualism, remote simultaneous interaction, the observer-induced 'collapse of the wave-packet', etc. The hypothesis assumes that all possible outcomes are realized in every such momentary 'collapse', since the observer splits off into so many parallel, coexisting, but epistemically non-interaccessible 'worlds' whose subsequent branchings constitute the lifeline-or experiential world-series- for each of those proliferating centres of consciousness. Although Deutsch concedes that his 'multiverse' theory is counter-intuitive, he none the less takes it to be borne out beyond question by the sheer observational/predictive success of QM and the conceptual dilemmas that supposedly arise with alternative (single-universe) accounts. Moreover, he claims the theory resolves a range of longstanding philosophical problems, notably those of mind/body dualism, the various traditional paradoxes of time, and the freewill/determinism issue. The essay suggests on the contrary, that Deutsch unwittingly transposes into the framework of presentday quantum debate speculative themes from the history of rationalist metaphysics, often with bizarre or philosophically dubious results, and that he rules out at least one promising rival account, namely Bohm's 'hidden variables' theory. It goes on to consider reasons for resistance to that theory among proponents of the 'orthodox' (Copenhagen) doctrine, and for the strong anti-realist, at times even irrationalist bias that has characterized much of this discussion since Bohr's debates with Einstein about quantum non-locality, observer-intervention, and the limits of precise measurement. Finally, the contrast is pointed out between Deutsch's ontologically extravagant use of the many-worlds hypothesis (akin to certain ideas advanced by speculative metaphysicians from Leibniz down) and those realist modes of counterfactual reasoning- e.g. in Kripke and the early Putnam- which deploy similar arguments to very different causal-explanatory ends.

In this essay I examine various aspects of the nearcentury-long debate concerning the conceptualfoundations of quantum mechanics and the problems ithas posed for physicists and philosophers fromEinstein to the present. Most crucial here is theissue of realism and the question whether quantumtheory is compatible with any kind of realist orcausal-explanatory account which goes beyond theempirical-predictive data. This was Einstein's chiefconcern in the famous series of exchanges with NielsBohr when he refused to accept the truth orcompleteness of a doctrine (orthodox QM) which ruledsuch questions to be strictly inadmissible. I discussthe later history of quantum-theoretical debate withparticular reference to the issue of nonlocality,i.e., the phenomenon of superluminal(faster-than-light) interaction betweenwidely-separated particles. Then I show how thestandard `Copenhagen' interpretation of QM hasinfluenced current anti-realist orontological-relativist approaches to philosophy ofscience. Indeed, there are clear signs that somephilosophers have retreated from a realist positionvery largely in response to just these problems. So itis important to ask exactly why – on what scientificor philosophical grounds – any preferred alternative(causal-realist) construal should have been ruled outas a matter of orthodox QM wisdom. Moreconstructively, my paper presents various arguments infavour of one such alternative, the `hidden-variables'theory developed since the early 1950s by David Bohmand consistently marginalised by proponents of theCopenhagen doctrine.

Paul de Man - literary critic, literary philosopher, "American deconstructionist" - changed the landscape of criticism through his rigorous theories and writings. Upon its original publication in 1988, Christopher Norris' book was the first full-length introduction to de Man, a reading that offers a much-needed corrective to the pattern of extreme antithetical response which marked the initial reception to de Man's writings. Norris addresses de Man's relationship to philosophical thinking in the post-Kantian tradition, his concern with "aesthetic ideology" as a potent force of mystification within and beyond that tradition, and the vexed issue of de Man's politics. Norris brings out the marked shift of allegiance in de Man's thinking, from the thinly veiled conservative implications of the early essays to the engagement with Marx and Foucault on matters of language and politics in the late, posthumous writing. At each stage, Norris raises these questions through a detailed close reading of individual texts which will be welcomed by those who lack any specialised knowledge of de Man's work

In this sweeping volume, Christopher Norris challenges the view that there is no room for productive engagement between mainstream analytic philosophers and thinkers in the post-Kantian continental line of descent. On the contrary, he argues, this view is simply the product of a limiting perspective that accompanied the rise of logical positivism. Norris reveals the various shared concerns that have often been obscured by parochial interests or the desire to stake out separate philosophical territory. He examines the problems that emerged within the analytic tradition as a result of its turn against Husserlian phenomenology and its outright rejection of what came to be seen as a merely "psychologistic" approach to issues of meaning, knowledge, and truth. Norris shows how these problems have resurfaced in various forms from the heyday of logical empiricism to the present. He provides critical readings of such philosophers as Willard Quine, Thomas Kuhn, Donald Davidson, Hilary Putnam, Richard Rorty, Michael Dummett, Thomas Nagel, and John McDowell. He also offers a running discussion of Wittgenstein's influence and its harmful effect in promoting a placidly consensus-based theory of knowledge. On the continental side, Norris argues for a reassessment of Husserl's phenomenological project and its potential contribution to present-day Anglo-American debates in epistemology and philosophy of science. He discusses Bachelard, Canguilhem, and the French tradition of rationalisme applique as an alternative to Kuhnian conceptions of scientific paradigm change. This leads him to suggest a non-Wittgensteinian way around the problems that have dogged more traditional theories of knowledge andtruth. In two chapters on the work of Jacques Derrida, Norris explores the "supplementary" logic of deconstruction and compares it with other recent proposals for a nonstandard logic. Here again he stresses the community of interests between the two philosophical cultures and the extent to which continental thinking has engaged certain issues with a rigor largely ignored by Anglophone writers. By bringing a fresh perspective to questions that have often been considered the exclusive preserve of analytic philosophy, Norris offers an overview of current debates that is at once refreshingly open-minded and sure of its own argumentative bearings.

Hilary Putnam has famously undergone some radical changes of mind with regard to the issue of scientific realism and its wider epistemological bearings. In this paper I defend the arguments put forward by early Putnam in his essays on the causal theory of reference as applied to natural-kind terms, despite his own later view that those arguments amounted to a form of 'metaphysical' realism which could not be sustained against various lines of sceptical attack. I discuss some of the reasons for Putnam's retreat, first to the theory of 'internal (or framework-relative) realism proposed in his middle-period writings, and then to a commonsensepragmatist stance which claims to resituate this whole discussion on ground that has not been trorldden into ruts by the contending philosophical schools. In particular I examine his protracted engagement with various forms of anti-realist doctrine (Michael Dummett's most prominent among them), with Wittgenstein's thinking about language-games or meaning-as-use, and with a range of sceptical- relativist positions adopted in the wake of Quine's influential attack on the two last 'dogmas' of logical empiricism. My paper seeks to show that Putnam has been over-impressed by some of the arguments — from these and other sources — which he takes to constitute a knock-down case against the kind of extemalist and causal-realist approach developed in his early essays. It concludes by re-stating that position in summary form and relating it to other, more recent defences of causal realism in epistemology and philosophy of science.