This paper explores a novel form of Mental Fictionalism: Fictionalism about talk of neural representations in cognitive science. This type of Fictionalism promises to (i) avoid the hard problem of naturalising representations, without (ii) incurring the high costs of eliminating useful representation talk. In this paper, I motivate and articulate this form of Fictionalism, and show that, despite its apparent advantages, it faces two serious objections. These objections are: (1) Fictionalism about talk of neural representations ultimately does not avoid the (...) problem of naturalising representations; (2) Fictional representations cannot play the explanatory role required by cognitive science. (shrink)

The paper argues that no second order theory is ontologically commited to anything beyond what its individual variables range over.

ABSTRACT Historical structuralist views have been ontological. They either deny that there are any mathematical objects or they maintain that mathematical objects are structures or positions in them. Non-ontological structuralism offers no account of the nature of mathematical objects. My own structuralism has evolved from an early sui generis version to a non-ontological version that embraces Quine’s doctrine of ontological relativity. In this paper I further develop and explain this view.

In this paper we introduce a distinct metaethical position, fictionalism about morality. We clarify and defend the position, showing that it is a way to save the 'moral phenomena' while agreeing that there is no genuine objective prescriptivity to be described by moral terms. In particular, we distinguish moral fictionalism from moral quasi-realism, and we show that fictionalism possesses the virtues of quasi-realism about morality, but avoids its vices.

O trabalho identifica algumas questões críticas em tentativas recentes de tratar o objeto da moralidade como uma ficção. Sobre o pano de fundo de uma distinção entre cognitivismo e não-cognitivismo moral exclusivamente em termos da natureza do estado mental expresso pelo enunciado moral, independentemente do conteúdo semântico do enunciado , o trabalho mostra um deficit estrutural no argumento da intransigência proposto por Kalderon a favor do ficcionalismo moral hermenêutico . Mediante a reconstrução dos passos que levam do cognitivismo irrealista ao (...) ficcionalismo moral revolucionário, argumenta-se que não é claro como uma moral fictícia concebida por Joyce poderia ainda ter uma influência adequada na conduta cooperativa e na resolução de conflitos de interesses . Ademais, a diferenciação entre a interpretação de dicto e a interpretação de re da conexão necessária entre o juízo moral e a motivação revela as lacunas no argumento internalista comum a favor do não-cognitivismo e no argumento da bizarrice em favor do cognitivismo irrealista . O trabalho é encerrado com algumas observações sobre o recurso à teoria humiana das razões normativas na tentativa de justificação da teoria do erro invocada pelo ficcionalismo moral revolucionário .The paper identifies some critical issues in recent attempts to treat the subject matter of morality as a fiction. On the background of a distinction between moral cognitivism and noncognitivism exclusively in terms of the nature of the mental state expressed by a moral statement regardless of the semantic content of the statement , the paper shows a structural deficit in Kalderon’s argument from intransigence for hermeneutic moral fictionalism . By reconstructing the steps that lead from irrealist cognitivism to revolutionary moral fictionalism, it is then argued that it is not clear how a fictitious morality as envisaged by Joyce could still have an adequate impact on cooperative conduct and the resolution of conflict of interests . Further, the differentiation of a de dicto and a de re interpretation of the necessary connection between moral judgment and motivation reveals the flaws in the familiar internalist argument for noncognitivism and in the argument from queerness for irrealist cognitivism . The paper closes with some remarks on the appeal to the Humean theory of normative reasons in the attempted justification of the error theory invoked by Joyce’s revolutionary moral fictionalism. (shrink)

Peter Geach proposed a substitutional construal of quantification over thirty years ago. It is not standardly substitutional since it is not tied to those substitution instances currently available to us; rather, it is pegged to possible substitution instances. We argue that (i) quantification over the real numbers can be construed substitutionally following Geach's idea; (ii) a price to be paid, if it is that, is intuitionism; (iii) quantification, thus conceived, does not in itself relieve us of ontological commitment to real (...) numbers. (shrink)

Questions about necessity (or what has to be, or what cannot be otherwise) and possibility (or what can be, or what could be otherwise) are questions about modality. Fictionalism is an approach to theoretical matters in a given area which treats the claims in that area as being in some sense analogous to fictional claims: claims we do not literally accept at face value, but which we nevertheless think serve some useful function. However, despite its name, “Modal Fictionalism” in its (...) usual manifestations is not primarily fictionalism about claims of necessity and possibility, but rather a fictionalist approach to claims about possible worlds. (For instance, modal fictionalism is not normally fictionalist about the claim that “it is possible that there be a species of tail-less kangaroo”, but rather about the claim that “there is a possible world in which there is a species of tail-less kangaroo”.) The practice of taking possible worlds to be merely convenient fictions, or of treating talk about possible worlds as being useful without being literally correct, is quite common in philosophical circles. It is only recently, however, that philosophers have seriously examined the implications of taking possible worlds to be merely fictional objects, like Sherlock Holmes or a frictionless surface. (shrink)

A pressing problem for many non-realist1 theories concerning various specific subject matters is the challenge of making sense of our ordinary propositional attitude claims related to the subject in question. Famously in the case of ethics, to take one example, we have in ordinary language prima facie ascriptions of beliefs and desires involving moral properties and relationships. In the case, for instance, of “Jason believes that Kylie is virtuous”, we appear to have a belief which takes Kylie to be a (...) certain way. If Jason desires that Kylie acts as she ought, he appears to have a desire which has as its content that Kylie perform actions of a certain sort (i.e. the actions that she ought to perform). However, for non-cognitivists in ethics who reject the idea that sentences such as “Kylie is virtuous” or “Kylie acts as she ought” are in the business of making truth-apt claims, or representing that certain moral features are possessed by objects or events, or even, in extreme cases, that such claims express propositions at all, the semantic analysis of the example propositional attitude claims made about Jason will have to be non-standard. (This is merely an application of the well-known “Frege-Geach problem” (see Geach 1965) to the case of embedding moral vocabulary in propositional-attitude ascriptions.). (shrink)