Online research in philosophy

Psychologism is the attempt to account for the necessary truths of mathematics in terms of contingent psychological facts. It is widely regarded as a fallacy. Jackendoff's view of reference and truth entails psychologism. Therefore, he needs to either provide a defense of the doctrine, or show that the charge doesn't apply.

This paper discusses George Boole?s two distinct approaches to the explanatory relationship between logical and psychological theory. It is argued that, whereas in his first book he attributes a substantive role to psychology in the foundation of logical theory, in his second work he abandons that position in favour of a linguistically conceived foundation. The early Boole espoused a type of psychologism and later came to adopt a type of anti-psychologism. To appreciate this invites a far-reaching reassessment of his philosophy of logic.

By tracing the general evolution of HusserI’s theory of logic and mathematics, this essay explores Husserl’s identification and strategic overcoming of the two forms of psychologism--Iogical psychologism and transcendental psychologism--that bar the way to rigorous phenomenological inquiry. In the early works “On the Concept of Number” and the Philosophie der Arithmetik Husserl himself falls victim to a particular form of logical psychologism. By the time of the Logical Investigations this problem has been dealt with: the method of eidetic intuition enables an account of the “origins” of logical and mathematical concepts without reducing such concepts to mere predicates of mental acts. The task of Formal and Transcendental Logic is to disclose the more pervasive problem of transcendental psychologism, one that taints even the theory of pure logic articulated in the Logical Investigations. A radical solution is provided through the development of an “ultimate logic” of transcendental subjectivity.

Psychologism is the view that practical reasons are psychological states. It is widely thought that psychologism is supported by the following principle governing explanation: TF. The difference between false and true beliefs on A's part cannot alter the form of the explanation which will be appropriate to A's actions. (TF) seems to imply that we always need to cite agents' beliefs when explaining their actions, no matter whether those beliefs are true or false. And this seems to vindicate psychologism. I argue, however, that the standard argument for psychologism which includes (TF) as a premise in fact fails to establish its intended conclusion. As a result, the overall case for psychologism is not as strong as it may initially seem.

Wayne Martin's Theories of Judgment marks a significant advance in the philosophical analysis of judgment. He understands that the domain of judgment is so large that it allows only a selective treatment. We can expand Martin's insight by acknowledging that this domain is, in fact, hypercomplex and therefore unsurveyable in Wittgenstein's sense. Martin's treatment of judgments can, however, be extended in a number of directions. Of particular importance is it to understand the linguistic aspect of theoretical judgments, the challenges to the synthetic conception of judgment constituted not only by existential, but also by impersonal and negative judgments, and the exploration of the links between the notions of judgment and truth.

In section 1 I offer a definition of psychologism which applies to many of the apparently quite disparate uses that philosophers have made of the term. In section 2 I map out some distinct varieties of psychologism. In a short section 3 I indicate how the changing academic climate has injected a new urgency into the debate on psychologism. In section 4 I offer an argument for a variety of psychologism which has important consequences for cognitive science, and in section 5 I consider some objections to the argument.

The standard account of weakness of will identifies it with akrasia, that is, with action against one's best judgment. Elsewhere I have argued that weakness of will is better understood as over-readily giving up on one's resolutions. Many cases of weak willed action will not be akratic: in over-readily abandoning a resolution an agent may well do something that they judge at the time to be best. Indeed, in so far as temptation typically gives rise to judgment shift -- to a tendency to change one's judgment so that one values the tempting option as the best -- weak willed action will typically be akratic. But conversely, strong willed action now looks as though it will be akratic. I argue though that it need not be, once we distinguish between actual judgment, and dispositions to judge. Within this framework, the issue of inverse akrasia looks rather different. I argue that whilst Huckleberry Finn plausibly does show weakness of will in abandoning his resolve to turn Jim in, it is far from clear that he is akratic: a point brought out well in Twain's later additions to the text. Whilst cases of inverse akrasia are clearly theoretically possible, I suggest that, given cognitive dissonance mechanisms, they are unlikely to be very common.

Wayne Martin traces attempts to develop theories of judgment in British Empiricism, the logical tradition stemming from Kant, nineteenth-century psychologism, recent experimental neuropsychology, and the phenomenological tradition associated with Brentano, Husserl and Heidegger. His reconstruction of vibrant but largely forgotten nineteenth-century debates links Kantian approaches to judgment with twentieth-century phenomenological accounts. He also shows that the psychological, logical and phenomenological dimensions of judgment are not only equally important, but fundamentally interlinked.