Judgement and Certainty

Judgement is the interiorisation of assertion: the inner\ud notion of judgement is to be explained in terms of the outer\ud notion of assertion. When someone asserts "Snow is\ud white", an interlocutor is entitled to ask "How do you know?"\ud If the asserter is not able to give grounds for his assertion,\ud it has to be withdrawn. In an assertion an illocutionary\ud claim that one has grounds is present; an assertion is thus\ud a claim to knowledge. Not all occurrences of declarative\ud sentences are asserted. In such cases the context should\ud make it clear that the declarative is, for example, used to\ud express mere opinion or conjecture. Whereas an assertion\ud made is correct or incorrect, other uses of the declarative\ud do not allow for this distinction. Just as for assertion, implicit\ud in every judgement is a claim to knowledge; judgement\ud is an epistemic notion

Non-Normative Logical Pluralism and the Revenge of the Normativity Objection

Logical pluralism is the view that there is more than one correct logic. Most logical pluralists think that logic is normative in the sense that you make a mistake if you accept the premisses of a valid argument but reject its conclusion. Some authors have argued that this combination is self-undermining: Suppose that L1 and L2 are correct logics that coincide except for the argument from Γ to φ, which is valid in L1 but invalid in L2. If you accept all sentences in Γ, then, by normativity, you make a mistake if you reject φ. In order to avoid mistakes, you should accept φ or suspend judgment about φ. Both options are problematic for pluralism. Can pluralists avoid this worry by rejecting the normativity of logic? I argue that they cannot. All else being equal, the argument goes through even if logic is not normative

Particularity as Paradigm: A Wittgensteinian Reading of Hegel’s Subjective Logic

I provide a distinctively Wittgensteinian interpretation of Hegel’s Subjective Logic, including the parts on the concept, the judgement and the syllogism. I argue that Wittgenstein implicitly recognised the moments of universality, particularity and individuality; moreover, he was sensitive to Hegel’s crucial distinction between abstract and concrete universals. More specifically, for Wittgenstein the moment of particularity has the status of a paradigmatic sample which mediates between a universal concept and its individual instances. Thus, a concrete universal is a universal that includes every individual via its paradigmatic sample. Next, I provide a generic account of the emergence of concrete universals through a series of negations that follows the basic structure of Hegel’s judgement—“the individual is the universal”—and the syllogism—“the individual is the universal mediated by the particular”. This development is illustrated with examples from Hegel (a plant, Socrates, Caesar, a Stoic sage, Jesus) as well as from Wittgenstein (colour samples, the standard metre, works of art). I take Wittgenstein’s argument against private language as implying that we cannot do without paradigms in our epistemic practices. If the conclusion of the section “Subjectivity” in Hegel’s Science of Logic is that the moment of particularity cannot be ignored or dispensed with, then it would mean that we cannot do without paradigms in our epistemic practices: that is, that private rules are impossible

Informal fallacies as cognitive heuristics in public health reasoning

The public must make assessments of a range of health-related issues. However, these assessments require scientific knowledge which is often lacking or ineffectively utilized by the public. Lay people must use whatever cognitive resources are at their disposal to come to judgement on these issues. It will be contended that a group of arguments - so-called informal fallacies - are a valuable cognitive resource in this regard. These arguments serve as cognitive heuristics which facilitate reasoning when knowledge is limited or beyond the grasp of reasoners. The results of an investigation into the use of these arguments by the public are reported

Why the idea of framework propositions cannot contribute to an understanding of delusions

One of the tasks that recent philosophy of psychiatry has taken upon itself is to extend the range of understanding to some of those aspects of psychopathology that Jaspers deemed beyond its limits. Given the fundamental difficulties of offering a literal interpretation of the contents of primary delusions, a number of alternative strategies have been put forward including regarding them as abnormal versions of framework propositions described by Wittgenstein in On Certainty. But although framework propositions share some of the apparent epistemic features of primary delusions, their role in partially constituting the sense of inquiry rules out their role in helping to understand delusions

Kant on Religious Feelings - An Extrapolation

The religious feeling considered in this paper is the feeling of awe that can be construed in the extrapolation of the feeling of respect for the law. The latter itself can be better understood in analogy to the feeling of the sublime. Hence the thesis of my interpretation and extrapolation is: a characterization of the religious feeling in Kant’s critiques of reason and their analyses of feelings is possible. It has to be understood in analogy to the feeling of respect for the law and thus to the feeling of the sublime. The religious feeling would, as certain formulations suggest, refer to awe of the inconceivable size of God. The religious feeling of awe would also be a feeling caused by reason -- an instance of a judgement-based feeling. The respective judgement is a reflexive judgement, an achievement of the reflecting faculty of judgement. The religious feeling would resemble Schleiermacher’s ”plain feeling of dependence’, but given the analogy with the dialectics of the sublime, it would also include the complementary component of self-elevation

The Epistemic Significance of Valid Inference – A Model-Theoretic Approach

The problem analysed in this paper is whether we can gain knowledge by using valid inferences, and how we can explain this process from a model-theoretic perspective. According to the paradox of inference (Cohen & Nagel 1936/1998, 173), it is logically impossible for an inference to be both valid and its conclusion to possess novelty with respect to the premises. I argue in this paper that valid inference has an epistemic significance, i.e., it can be used by an agent to enlarge his knowledge, and this significance can be accounted in model-theoretic terms. I will argue first that the paradox is based on an equivocation, namely, it arises because logical containment, i.e., logical implication, is identified with epistemological containment, i.e., the knowledge of the premises entails the knowledge of the conclusion. Second, I will argue that a truth-conditional theory of meaning has the necessary resources to explain the epistemic significance of valid inferences. I will explain this epistemic significance starting from Carnap’s semantic theory of meaning and Tarski’s notion of satisfaction. In this way I will counter (Prawitz 2012b)’s claim that a truth-conditional theory of meaning is not able to account the legitimacy of valid inferences, i.e., their epistemic significance

Science, thought and nature: Hegel’s completion of Kant’s idealism [Special Issue]

Focusing on Hegel’s engagement with Kant’s theoretical philosophy, the paper shows the merits of its characterisation as “completion”. The broader aim is to offer a fresh perspective on familiar historical arguments and on contemporary discussions of philosophical naturalism by examining the distinctive combination of idealism and naturalism that motivates the priority both authors accord to the topics of testability of philosophical claims and of the nature of the relation between philosophy and the natural science. Linking these topics is a question about how the demands of unification—imposed internally, relative to conceptions of the proper conduct of philosophical enquiry—can accommodate realism, a key element in establishing disciplinary parity between philosophy and the natural sciences. The distance that ultimately marks Kant’s and Hegel’s answers to this question justifies the interpretative claim about completion, while the conceptual patterns exemplified in the posing of the question and in their shared assumptions about its philosophical importance justifies the reconstructive claim about “idealist naturalism

On Conceiving the Inconsistent

This work has been developed within the 2013–15 ahrc project The Metaphysical Basis of Logic: The Law of Non-Contradiction as Basic Knowledge (grant ref. ah/k001698/1). A version of the paper was presented in September 2013 at the Modal Metaphysics Workshop in Bratislava. I am grateful to the audiences there and at the Aristotelian Society meeting for many helpful comments and remarks.Peer reviewedPostprin

Circles and analogies in public health reasoning

The study of the fallacies has changed almost beyond recognition since Charles Hamblin called for a radical reappraisal of this area of logical inquiry in his 1970 book Fallacies. The “witless examples of his forbears” to which Hamblin referred have largely been replaced by more authentic cases of the fallacies in actual use. It is now not unusual for fallacy and argumentation theorists to draw on actual sources for examples of how the fallacies are used in our everyday reasoning. However, an aspect of this move towards greater authenticity in the study of the fallacies, an aspect which has been almost universally neglected, is the attempt to subject the fallacies to empirical testing of the type which is more commonly associated with psychological experiments on reasoning. This paper addresses this omission in research on the fallacies by examining how subjects use two fallacies – circular argument and analogical argument – during a reasoning task in which subjects are required to consider a number of public health scenarios. Results are discussed in relation to a view of the fallacies as cognitive heuristics that facilitate reasoning in a context of uncertainty