Frederick Kroon

In our paper, we mount a novel argument, which trades on recent work by Roy Sorensen [2016], following work by Saul Kripke, against Yablo's preferred reading of if-thenism, which is an attempt to read problematically ontologically committing sentences in a way that does not carry such ontological commitments. Although our argument is directed at Yablo's proposed reading of if-thenism, if the argument is successful, other versions of if-thenism may be affected. After reviewing Sorensen's recent work and presenting our argument, we consider a possible way out and use this as a means for presenting some challenges to Yablo.

Using ideas proposed in Aboutness and developed in ‘If-thenism’, Stephen Yablo has tried to improve on classical if-thenism in mathematics, a view initially put forward by Bertrand Russell in his Principles of Mathematics. Yablo’s stated goal is to provide a reading of a sentence like ‘The number of planets is eight’ with a sort of content on which it fails to imply ‘Numbers exist’. After presenting Yablo’s framework, our paper raises a problem with his view that has gone virtually unnoticed in the literature. If we are right, then Yablo’s version of if-thenism cannot succeed.

The most widely accepted kind of realism about fictional characters takes them to be abstract artefacts created through the act of fiction-making (creationism). And perhaps the best, and most widely accepted, way of arguing for creationism involves the kind of argument described by van Inwagen: arguments that begin with uncontentious premises about fictional characters and end up with existential conclusions affirming the existence of fictional characters of various kinds. This chapter argues that if such arguments establish their conclusion, they also license the conclusion that there are indiscernible fictional objects, indeed an indeterminate number of them. To the extent that such a conclusion is metaphysically intolerable we should reject this kind of argument for creationism.

In this paper we consider the possibility of a Quantum Molinism : such a view applies an analogue of the Molinistic account of free will‘s compatibility with God’s foreknowledge to God’s knowledge of (supposedly) indeterministic events at a quantum level. W e ask how (and why) a providential God could care for and know about a world with this kind of indeterminacy. We consider various formulations of such a Quantum Molinism, and after rejecting a number of options arrive at one seemingly coherent formulation.

In their recent ‘The ethical case for non-directed postmortem sperm donation’, Hodson and Parker outline and defend the concept of voluntary non-directed postmortem sperm donation, the idea that men should be able to register their desire to donate their sperm after death for use by strangers since this would offer a potential means of increasing the quantity and heterogeneity of donor sperm. In this response, we raise some concerns about their proposal, focusing in particular on the fact that current methodologies do not make for a reliable way of ensuring that sperm retrieved postmortem has a good chance of leading to conception, which is in turn likely to make potential recipients reluctant to use such sperm. These concerns add to the ethical doubts that attend aspects of the proposal, making the prospect of implementation of such a policy unlikely at best.

Chapter V attempts to provide the elements of a solution to the problem of how terms in theoretical sciences acquire their reference. Its proposal is that a theory of reference-acquisition for theoretical terms should acknowledge the fact that what fixes the reference of a theoretical term is typically the embedding theory as a whole, not an austere causal description like 'the item causally responsible for event E.' It is argued that there are epistemic reasons for the existence of this phenomenon, and an attempt is made to show how, by appealing to these reasons, it is nonetheless possible to understand the reference-determining role of theories in such a way that occurrences of a term embedded in incompatible theoretical frameworks can often be interpreted as co-referential. ;Chapter IV is an interlude. It argues for the relevance of the theory of reference to the topic of intertheoretic reduction. It does this by attempting to demonstrate that intertheoretic reduction in the natural sciences requires intertheoretic identities involving theoretical terms, and that making sense of such identities demands a theory of reference-acquisition for theoretical terms. The chapter also argues that the problem of how mathematical terms secure their reference precludes an obvious extension of this model to examples of reduction in mathematics. It further criticizes attempts to make sense of mathematical reductions in terms of concepts of ontological reduction, and it suggests that much recent work on ontological reduction, especially the attempt to exclude all-out 'Pythagorean' reductions, is flawed through its failure to take referential semantics seriously. ;Chapter II contains exposition and criticism of both the descriptivist account of reference and Kripke's version of the 'causal' account of reference. The latter account is represented as a recursive account, with a base clause specifying how terms initially acquire their reference and a recursion clause specifying how the ability to use a term with a certain reference is transmitted to other users . It is argued that the Kripkean formulation of referential intentions at the reference-transmission stage is flawed, in part because the formulation makes his account unable to capture the dynamics of the way in which a person's use of a term may undergo reference-shifts without these shifts in reference being intended. ;The third chapter suggests an alternative account. It motivates and sketches a mixed causal-descriptivist theory speaker's reference, formulated in terms of first-order referential intentions, and then uses this theory to sketch aspects of a mixed causal-descriptivist account of term reference, formulated in terms of second-order intentions to intend the 'right' object . It is argued that such an account provides a plausible solution to a number of problems confronting Kripke's account, including that of unintended reference-shifts. ;This dissertation consists of five chapters whose unifying theme is the theory of term-reference. The first chapter offers an overview and critical comparison of two opposing approaches to the topic of reference: the semantic holism of Quine-Davidson, and the semantic atomism of those who treat reference as a relation that grounds the assignment of truth-conditions to sentences. The chapter argues that the apparent theoretical importance of referential intentions, emphasised in Saul Kripke's work on reference and argued for in detail in chapter III of the dissertation, provides strong support for semantic atomism, since such intentions are used to explain reference-assignments and, indirectly, truth-conditions

Identity claims often look nonsensical because they apparently declare distinct things to be identical. I argue that this appearance is not just an artefact of grammar. We should be fictionalists about such claims, seeing them against the background of speakers' pretense that their words secure reference to a plurality of objects that are then declared to be identical from within the pretense. I argue that it is the resulting interpretative tension – arising from the fact that two things can never be identical – that allows us to understand the real point of such statements. This view also offers a new solution to Fege's puzzle of the informativeness of identity statements.

We argue that computation via quantum mechanical processes is irrelevant to explaining how brains produce thought, contrary to the ongoing speculations of many theorists. First, quantum effects do not have the temporal properties required for neural information processing. Second, there are substantial physical obstacles to any organic instantiation of quantum computation. Third, there is no psychological evidence that such mental phenomena as consciousness and mathematical thinking require explanation via quantum theory. We conclude that understanding brain function is unlikely to require quantum computation or similar mechanisms.

This paper presents a theory and computational model of the role of emotions in group decision making. After reviewing the role of emotions in individual decision making, it describes social and psychological mechanisms by which emotional and other information is transmitted between individuals. The processes by which these mechanisms can contribute to group consensus are modeled computationally using a program, HOTCO 3, which has been used to simulate simple cases of emotion-based group decision making