The paper takes a closer look at the role of knowledge and evidence in legal theory. In particular, the paper examines a puzzle arising from the evidential standard Preponderance of the Evidence and its application in civil procedure. Legal scholars have argued since at least the 1940s that the rule of the Preponderance of the Evidence gives rise to a puzzle concerning the role of statistical evidence in judicial proceedings, sometimes referred to as the Problem of Bare Statistical Evidence. While (...) this puzzle has led to the development of a multitude of accounts and approaches in the legal literature, I argue here that the problem can be resolved fairly straightforwardly within a knowledge-first framework. (shrink)

Knowledge and Presuppositions develops a novel account of epistemic contextualism based on the idea that pragmatic presuppositions play a central role in the semantics of knowledge attributions. According to Blome-Tillmann, knowledge attributions are sensitive to what is pragmatically presupposed at the context of ascription. The resulting theory--Presuppositional Epistemic Contextualism (PEC)--is simple and straightforward, yet powerful enough to have far-reaching and important consequences for a variety of hotly debated issues in epistemology and philosophy of language. -/- In this book, Blome- (...) class='Hi'>Tillmann first develops Presuppositional Epistemic Contextualism and then explores its ability to resolve various sceptical paradoxes and puzzles. Blome-Tillmann also defends PEC against familiar and widely discussed philosophical and linguistic objections to contextualism. In the final chapters of the book PEC is employed to illuminate a variety of concerns central to contemporary discussions of epistemological issues, such as Gettier cases, Moorean reasoning, the nature of evidence, and other current problems and puzzles. (shrink)

The present paper argues that when thematic roles are restricted to judgments about causal properties of events, it falls short of accounting for cases where thematic roles reflect judgments about dispositional properties of objects. I develop my argument with a case study on a class of verbs that have been called ‘Emission Verbs’ and which are difficult to bring in line with the unaccusativity hypothesis put forward by Perlmutter. Reviewing two diametrically opposed accounts of Emission Verbs in the literature, I (...) show that the thematic-semantic relation between the events described by Emission Verbs and their single arguments cannot be characterized unambiguously in terms of causal properties of events but pertains to dispositional properties residing in the emitter argument. The paper develops a lexical-semantic analysis of Emission Verbs according to which the event described by an Emission Verb is the manifestation of the dispositional property of the emitter argument when appropriate external circumstances obtain. The paper concludes by outlining how the proposed dispositional analysis of Emission Verbs may inform the analysis of the causative alternation. (shrink)

Die Konstitution des menschlich-personalen Geistes ist fur Augustinus und Anselm von<I> Canterbury von<I> zentraler Bedeutung. Dabei sind Einheit und Identitat des Geistes und die Erkenntnis Gottes als des immer schon gewussten absoluten Grundes untrennbar miteinander verbunden. Dies wird bei Augustinus unter anderem in der Zeituberhobenheit des Geistes und bei Anselm im ontologischen Argument deutlich. Mit Hilfe der gewonnenen Erkenntnisse konnen auch unterschiedliche Perspektiven in okumenischer Hinsicht deutlich gemacht werden, wie anhand zweier Exkurse aufgezeigt wird.".

Recent attempts to resolve the Paradox of the Gatecrasher rest on a now familiar distinction between individual and bare statistical evidence. This paper investigates two such approaches, the causal approach to individual evidence and a recently influential (and award-winning) modal account that explicates individual evidence in terms of Nozick's notion of sensitivity. This paper offers counterexamples to both approaches, explicates a problem concerning necessary truths for the sensitivity account, and argues that either view is implausibly committed to the impossibility of (...) no-fault wrongful convictions. The paper finally concludes that the distinction between individual and bare statistical evidence cannot be maintained in terms of causation or sensitivity. We have to look elsewhere for a solution of the Paradox of the Gatecrasher. (shrink)

The paper explicates a new way to model the context-sensitivity of 'knows', namely a way that suggests a close connection between the content of 'knows' in a context C and what is pragmatically presupposed in C. After explicating my new approach in the first half of the paper and arguing that it is explanatorily superior to standard accounts of epistemic contextualism, the paper points, in its second half, to some interesting new features of the emerging account, such as its compatibility (...) with the intuitions of Moorean dogmatists. Finally, the paper shows that the account defended is not subject to the most prominent and familiar philosophical objections to epistemic contextualism discussed in the recent literature. (shrink)

Safety principles in epistemology are often hailed as providing us with an explanation of why we fail to have knowledge in Gettier cases and lottery examples, while at the same time allowing for the fact that we know the negations of sceptical hypotheses. In a recent paper, Sinhababu and Williams have produced an example—the Backward Clock—that is meant to spell trouble for safety accounts of knowledge. I argue that the Backward Clock case is, in fact, unproblematic for the more sophisticated (...) formulations of safety in the literature. However, I then proceed to construct two novel examples that turn out problematic for those formulations—one that provides us with a lottery-style case of safe ignorance and one that is a straightforward case of unsafe knowledge. If these examples succeed, then safety as it is usually conceived in the current debate cannot account for ignorance in all Gettier and lottery-style cases, and neither is it a necessary condition for knowledge. I conclude from these troublesome examples that modal epistemologists ought to embrace a much more simple and non-reductive version of safety, according to which the notion of similarity between possible worlds that determines in which worlds the subject must believe truly is an epistemic notion that cannot be defined or reduced to notions independent of knowledge. The resulting view is shown to also lead to desirable results with respect to lottery cases, certain quantum phenomena, and a puzzling case involving a cautious brain-in-a-vat. (shrink)

What is the relationship between conceptual engineering and metasemantic externalism? Sally Haslanger has argued that metasemantic externalism justifies the seemingly counterintuitive consequences of her proposed conceptual revisions. But according to Herman Cappelen, metasemantic externalism makes conceptual engineering effectively impossible in practice. After raising objections to Haslanger’s and Cappelen’s views, I argue for a very different picture, on which metasemantic externalism bears very little on conceptual engineering. I argue that, while metasemantic externalism principally operates at the level of semantic-meaning, we should (...) understand conceptual engineering to operate largely at the level of speaker-meaning. This ‘Speaker-Meaning Picture’ has two key benefits. Firstly, it makes conceptual engineering often easy in practice. Secondly, it suggests a new, normative response to the well known objection that conceptual engineering serves only to change the subject. (shrink)

A number of prominent epistemologists claim that the principle of sensitivity “play[s] a starring role in the solution to some important epistemological problems”. I argue that traditional sensitivity accounts fail to explain even the most basic data that are usually considered to constitute their primary motivation. To establish this result I develop Gettier and lottery cases involving necessary truths. Since beliefs in necessary truths are sensitive by default, the resulting cases give rise to a serious explanatory problem for the defenders (...) of sensitivity accounts. It is furthermore argued that attempts to modally strengthen traditional sensitivity accounts to avoid the problem must appeal to a notion of safety—the primary competitor of sensitivity in the literature. The paper concludes that the explanatory virtues of sensitivity accounts are largely illusory. In the framework of modal epistemology, it is safety rather than sensitivity that does the heavy explanatory lifting with respect to Gettier cases, lottery examples, and other pertinent cases. (shrink)

In recent work on the semantics of ‘knowledge’-attributions, a variety of accounts have been proposed that aim to explain the data about speaker intuitions in familiar cases such as DeRose’s Bank Case or Cohen’s Airport Case by means of pragmatic mechanisms, notably Gricean implicatures. This paper argues that pragmatic explanations of the data regarding ‘knowledge’-attributions are unsuccessful and concludes that in explaining those data we have to resort to accounts that (a) take those data at their semantic face value (Epistemic (...) Contextualism, Subject-Sensitive Invariantism or Epistemic Relativism), or (b) reject them on psychological grounds (Moderate Insensitive Invariantism). To establish this conclusion, the paper relies solely upon widely accepted assumptions about pragmatic theory, broadly construed, and on the Stalnakerian insight that linguistic communication takes place against the backdrop of a set of mutually accepted propositions: a conversation’s common ground. (shrink)

A long-standing position in philosophy, law, and theology is that a person can be held morally responsible for an action only if they had the freedom to choose and to act otherwise. Thus, many philosophers consider freedom to be a necessary condition for moral responsibility. However, empirical findings suggest that this assumption might not be in line with common sense thinking. For example, in a recent study we used surveys to show that – counter to positions held by many philosophers (...) – lay people consider actions to be free when they are spontaneous rather than being based on reasons. In contrast, responsibility is often considered to require that someone has thought about the alternative options. In this study we use an online survey to directly test to which degree lay judgements of freedom and responsibility match. Specifically, we test whether manipulations of deliberation affect freedom and responsibility judgements in the same way. Furthermore, we also test the dependency of these judgements on a person’s belief that their decision had consequences for their personal life. We find that people are generally considered to be more responsible for their actions than they are considered free, across most of the conditions tested. Furthermore, we found that deliberation had an opposite effect on freedom and responsibility judgements. People were considered more free when they acted spontaneously, whereas they were considered more responsible when they deliberated about their actions. These results seem to suggest that deliberating about reasons is crucially important for the lay concept of responsibility, while it is not obviously …. (shrink)

Martin Smith has recently proposed, in this journal, a novel and intriguing approach to puzzles and paradoxes in evidence law arising from the evidential standard of the Preponderance of the Evidence. According to Smith, the relation of normic support provides us with an elegant solution to those puzzles. In this paper I develop a counterexample to Smith’s approach and argue that normic support can neither account for our reluctance to base affirmative verdicts on bare statistical evidence nor resolve the pertinent (...) paradoxes. Normic support is, as a consequence, not a successful epistemic anti-luck condition. (shrink)

Certain puzzling cases have been discussed in the literature recently which appear to support the thought that knowledge can be obtained by way of deduction from a falsehood; moreover, these cases put pressure, prima facie, on the thesis of counter closure for knowledge. We argue that the cases do not involve knowledge from falsehood; despite appearances, the false beliefs in the cases in question are causally, and therefore epistemologically, incidental, and knowledge is achieved despite falsehood. We also show that the (...) principle of counter closure, and the concomitant denial of knowledge from falsehood, is well motivated by considerations in epistemological theory--in particular, by the view that knowledge is first in the epistemological order of things. (shrink)

Epistemic contextualism—the view that the content of the predicate ‘know’ can change with the context of utterance—has fallen into considerable disrepute recently. Many theorists have raised doubts as to whether ‘know’ is context-sensitive, typically basing their arguments on data suggesting that ‘know’ behaves semantically and syntactically in a way quite different from recognised indexicals such as ‘I’ and ‘here’ or ‘flat’ and ‘empty’. This paper takes a closer look at three pertinent objections of this kind, viz. at what I call (...) the Error-Theory Objection, the Gradability Objection and the Clarification-Technique Objection. The paper concludes that none of these objections can provide decisive evidence against contextualism. (shrink)

Jason Stanley has argued recently that Epistemic Contextualism (EC) and Subject‐Sensitive Invariantism (SSI) are explanatorily on a par with regard to certain data arising from modal and temporal embeddings of ‘knowledge’‐ascriptions. This paper argues against Stanley that EC has a clear advantage over SSI in the discussed field and introduces a new type of linguistic datum strongly suggesting the falsity of SSI.

In this chapter, I produce counterexamples to Presuppositional Epistemic Contextualism (PEC), a view about the semantics of ‘knowledge’-ascriptions that I have argued for elsewhere. According to PEC, the semantic content of the predicate ‘know’ at a context C is partly determined by the speakers’ pragmatic presuppositions at C. The problem for the view that I shall be concerned with here arises from the fact that pragmatic presuppositions are sometimes known to be true by the speakers who make them: hence the (...) Problem of Known Presuppositions. After discussing several unsuccessful ways to solve the problem, I propose the addition of a new Lewisian rule of proper ignoring to the semantics of PEC--namely, the Rule of Evidence-Based Ignoring. If the proposed account succeeds, the Problem of Known Presuppositions has a straightforward solution within the framework of PEC. (shrink)

Epistemic agency is a crucial concept in many different areas of philosophy and the cognitive sciences. It is crucial in dual process theories of cognition as well as theories of metacognition and mindreading, self-control, and moral agency. But what is epistemic agency? The Tinkering Mind argues that epistemic agency has two distinct and incompatible definitions. It can be simply understood as intentional mental action, or as a distinct non-voluntary form of evaluative agency. The core argument of the book demonstrates that (...) both definitions lead to surprising and counterintuitive consequences. If epistemic agency is a form of intentional action, then this implies that the radical theory of extended cognition has to be true. If, on the other hand, epistemic agency is not intentional action but evaluative agency, then intentional epistemic actions like deliberation are not truly cognitive but merely catalytic. Once established, the distinction between these two options sheds new light on various and diverse philosophical and psychological debates from dual process theories to debates on choice and self-control. (shrink)

This article studies the cognitive and communicative effects of typographical iconicity in poetry from the perspective of relevance theory. It argues that the visual aspect pertaining to an instance of typographical iconicity conveys a sensory impression, which perceptually resembles elements of the semantic material represented via the typographical iconicity’s lexical aspect. It is suggested that the non-propositional information relating to this impression can trigger the derivation of a wide array of weak implicatures which can combine to form an impressionistic and (...) indeterminate cognitive state described within relevance theory as a poetic effect. Furthermore, since the added effort, which the typographical iconicity requires to be perceived and processed, is offset by the derived implicatures, the use of typographical iconicity may be said to produce an optimally relevant level of processing. (shrink)

A philosopher argues that state-sponsored cyberattacks against central military or civilian targets are always acts of war. What is this philosopher doing? According to conceptual analysts, the philosopher is making a claim about our concept of war. According to philosophical realists, the philosopher is making a claim about war per se. In a quickly developing literature, a third option is being explored: the philosopher is engineering the concept of war. On this view, the philosopher is making a proposal about which (...) concept we should have – even if it deviates from the extant concept, and even if it does not capture ‘what war really is’. The activity or method of proposing such revisionary definitions, as well as the metaphilosophical reflection on it, has become known as conceptual engineering. (shrink)

Epistemic contextualism is widely believed to be incompatible with the recently popular view that knowledge is the norm of assertion, practical reasoning, or belief. I argue in this article that the problems arising for contextualism from the mentioned normative views are only apparent and can be resolved by acknowledging the fairly widespread phenomenon of non-obvious context-sensitivity (recently embraced by even some of contextualism's most ardent former critics). Building on recent insights about non-obvious context-sensitivity, the article outlines an independently attractive contextualist (...) account of the mentioned epistemic norms and provides a solution to the puzzles they give rise to in a contextualist framework. (shrink)

The paper discusses approaches to Epistemic Contextualism that model the satisfaction of the predicate ‘know’ in a given context C in terms of the notion of belief/fact-matching throughout a contextually specified similarity sphere of worlds that is centred on actuality. The paper offers three counterexamples to approaches of this type and argues that they lead to insurmountable difficulties. I conclude that what contextualists (and Subject-Sensitive Invariantists) have traditionally called the ‘epistemic standards’ of a given context C cannot be explicated in (...) terms of a contextually specified similarity sphere that is centred on actuality. The mentioned accounts of epistemic relevance and thus the corresponding accounts of the context-sensitivity (or subject-sensitivity) of ‘knows’ are to be rejected. (shrink)

Many concepts are inadequate for serious inquiry, so theorists often seek to engineer new concepts. The method of explication, which involves replacing concepts with more fruitful alternatives, is a model of this process. In this paper, I develop an account of fruitfulness, the Relevant-Goals Account of Fruitfulness. The account is in the spirit of extant proposals, but develops and extends them in important ways. In particular, while it applies to explications in general, the account allows us to derive substantive details (...) for specific explications. This is achieved through a supplementary view, Contextualism, that specifies which theoretical goals are relevant in any given case. I close by discussing how the Relevant-Goals Account fits into the dynamic nature of inquiry. (shrink)

We sometimes seek to change and improve our conceptual repertoire in some way. This is called ‘conceptual engineering’. In recent work, I have defended the ‘Speaker-Meaning Picture’ of conceptual engineering. Independently, while critiquing the conceptual engineering literature, Max Deutsch has argued against understanding conceptual engineering in terms of speaker-meaning. Deutsch’s critique targets what he calls the ‘standard account’ of conceptual engineering and its role in philosophy. In my contribution to this symposium, I also object to the ‘standard account’. I then (...) sketch a more moderate view, centred on the Speaker-Meaning Picture, arguing that it avoids Deutsch’s criticisms. I close by discussing a new objection to the Speaker-Meaning Picture, raised by Deutsch in this symposium: that it trivialises conceptual engineering methodology. (shrink)

In the course of theorising, it can be appropriate to replace one concept—a folk concept, or one drawn from an earlier stage of theorising—with a more precise counterpart. The best-known account of concept replacement is Rudolf Carnap’s ‘explication’. P.F. Strawson famously critiqued explication as a method in philosophy. As the critique is standardly construed, it amounts to the objection that explication is ‘irrelevant’, fails to be ‘illuminating’, or simply ‘changes the subject’. In this paper, I argue that this is an (...) unfair characterisation of Strawson’s critique, spelling out the critique in more detail and showing that, fully understood, it is not undermined by extant responses. In light of both the critique and extant responses, I close by making some substantive comments about what explication can, and cannot, be used to do in philosophy. (shrink)

In The Appearance of Ignorance, Keith DeRose develops a version of epistemic contextualism that combines aspects of both safety and sensitivity theories of knowledge. This paper discusses some potential problems for DeRose’s account stemming from his Rule of Sensitivity, which is meant to model upwards shifts in epistemic standards.

This article addresses and resolves an epistemological puzzle that has attracted much attention in the recent literature—namely, the puzzle arising from Moorean anti-sceptical reasoning and the phenomenon of transmission failure. The paper argues that an appealing account of Moorean reasoning can be given by distinguishing carefully between two subtly different ways of thinking about justification and evidence. Once the respective distinctions are in place we have a simple and straightforward way to model both the Wrightean position of transmission failure and (...) the Moorean position of dogmatism. The approach developed in this article is, accordingly, ecumenical in that it allows us to embrace two positions that are widely considered to be incompatible. The paper further argues that the Moorean Puzzle can be resolved by noting the relevant distinctions and our insensitivity towards them: once we carefully tease apart the different senses of ‘justified’ and ‘evidence’ involved, the bewilderment caused by Moore’s anti-sceptical strategy subsides. (shrink)

Moderate Pragmatic Invariantism has been criticized in the literature for postulating implicatures that are not straightforwardly cancellable. Defenders of MPI have responded that the data are not as clear-cut as one might wish. This paper grants the defenders of MPI, for the sake of argument, that the implicatures in question are cancellable and then turns this admission against them. In particular, the paper offers Bank Case variants in which the conversational implicatures postulated by MPI are contextually suspended – and thus (...) cancelled. Since our intuitions do not vary between the original Bank Case and these novel types of cases, the explanation offered by MPI must be mistaken. Our varying truth-value intuitions in the Bank Cases cannot be accounted for by means of conversational implicatures. (shrink)

In the wake of Clark and Chalmers famous argument for extended cognition some people have argued that willpower equally can extend into the environment (e.g. Heath and Anderson in The thief of time: philosophical essays on procrastination. Oxford University Press, New York, pp 233–252, 2010). In a recent paper Fabio Paglieri (Consciousness in interaction: the role of the natural and social context in shaping consciousness. John Benjamins, Amsterdam, pp 179–206, 2012) provides an interesting argument to the effect that there might (...) well be extended self control, but that willpower does not lend itself to extension. This paper argues that Paglieri is right in claiming that previous attempts to extend the will are flawed. It then provides an argument for extending the will that does not fall foul of Paglieri’s argument and actually provides us with an even stronger case for extension than the one that Clark and Chalmers provide for cognition. (shrink)

Humans seem special, because they are able to think about thinking (to make their mentality the object of their thoughts). In this paper I distinguish two very different ways in which thinking about thinking could be understood and which role these understandings play in the control of the mind. I argue on the one hand that language enables humans to express and attend to the content of their thoughts. This is an incredibly powerful tool which allows for the intentional manipulation (...) of content. On the other hand, however, this form of thinking about thinking does not require the agent to understand mental states as states and because of that it does not allow for the intentional targeting of the states. Only a second and metarepresentation based form of thinking about thinking allows for this control. the rest of the paper then discusses the possible function of the intentional control of the mind in future directed self control. (shrink)

This paper argues against the intuition that willpower and so called ‘tying to the mast’ strategies are fundamentally different types of mental actions to achieve self control. The argument for this surprising claim is that at least on the most plausible account of willpower an act of willpower consists in an intentional mental action that disables the mental agent and thereby creates a mental tie. The paper then defends this claim against the objection that tying to the mast strategies do (...) not have the same phenomenology as real willpower and that they do not preserve reason responsiveness. (shrink)

In everyday conversations we often convey information that goes above and beyond what we strictly speaking say: exaggeration and irony are obvious examples. H.P. Grice introduced the technical notion of a conversational implicature in systematizing the phenomenon of meaning one thing by saying something else. In introducing the notion, Grice drew a line between what is said, which he understood as being closely related to the conventional meaning of the words uttered, and what is conversationally implicated, which can be inferred (...) from the fact that an utterance has been made in context. Since Grice’s seminal work, conversational implicatures have become one of the major research areas in pragmatics. This article introduces the notion of a conversational implicature, discusses some of the key issues that lie at the heart of the recent debate, and explicates tests that allow us to reliably distinguish between semantic entailments and conventional implicatures on the one hand and conversational implicatures on the other. (shrink)

What are historians doing in the laboratory? Looking back over six years of collaborative work, researchers of the Making and Knowing Project at Columbia University discuss their experience with hands‐on reconstruction as a historical method. This work engages practical forms of knowledge—from pigment‐making to metal casting—recorded in the BnF Ms. Fr. 640, an anonymous French manuscript compiled in the later sixteenth century. Bodily encounters with materials and processes of the past offer insights into the material and mental worlds of early (...) modern artists and artisans, and train the eye in the interpretation of historical objects. At the same time, reconstruction contributes to the interpretation of the text: it is only by attempting to implement the instructions of practical or recipe literature that these texts can be understood as vehicles of emergent knowledge that only fully manifests itself in the doing. Overall, our approach to reconstruction mirrors that of the anonymous author‐practitioner, who explored a wide range of techniques through experimenting and writing. (shrink)

Shepherd and Justus argue that experimental philosophy has an important role to play in the method of Carnapian explication, facilitating the preparatory stage during which the concept to be explicated is clarified. I raise concerns about their specific proposal, before sketching an alternative. In particular, I suggest that experimental philosophy can directly aid the construction of fruitful concepts. This provides a clear practical role for experimental philosophy, both within the sciences and theoretical inquiry more generally. In this respect, experimental philosophy (...) may rightly be construed as one aspect of applied philosophy. (shrink)

Intuitively, choices seem to be intentional actions but it is difficult to see how they could be. If our choices are all about weighing up reasons then there seems no room for an additional intentional act of choice. Richard Holton has suggested a solution to this puzzle, which involves thinking of choices in a two systems of cognition framework. Holton’s suggestion does solve the puzzle, but has some unsatisfactory consequences. This paper wants to take over the important insights from Holton (...) on the phenomenology of choice and the possible explanation via a two systems framework, but wants to suggest an alternative more satisfactory account. This account is built around the idea that choices are what Pamela Hieronymi calls managerial acts. After developing the claim the paper then defends it against the objection that managerial control cannot be understood in a system1 context, by examining recent research on uncertainty monitoring and early forms of metacognition. (shrink)

Understanding and controlling our minds is one of the most fascinating features of human cognition. It has often been assumed that this ability requires a theoretical understanding of psychological states. This assumption has recently been put under pressure by so called mindshaping approaches. We agree that these approaches provide us with a new way of self-understanding and that they enable a very powerful form of self-regulation which we label narrative control. However, we insist that there still is a crucial role (...) for a theoretical understanding of psychological states in human cognition. We argue that this is because a theoretical understanding is necessary for all intentional control of the mind. Keywords: mindreading; mindshaping; narrative control; manipulative control; folk psychology. (shrink)

Problem gambling is a growing public health issue in the UK. In this paper, we argue that football plays a problematic role in the promotion and normalisation of gambling. Given that sport broadcas...

This paper investigates the linguistic basis for moral non-cognitivism, the view that sentences containing moral predicates do not have truth conditions. It offers a new argument against this view by pointing out that the view is incompatible with our best empirical theories about the grammatical encoding of illocutionary force potentials. Given that my arguments are based on very general assumptions about the relations between the grammar of natural languages and a sentence's illocutionary function, my arguments are broader in scope than (...) the familiar semantic objections to non-cognitivism relating to the so-called Frege-Geach problem: even if a solution to the Frege-Geach problem has been found, my arguments still stand. (shrink)

The most prominent arguments for scepticism in modern epistemology employ closure principles of some kind. To begin my discussion of such arguments, consider Simple Knowledge Closure (SKC): (SKC) (Kxt[p] ∧ (p → q)) → Kxt[q].1 Assuming its truth for the time being, the sceptic can use (SKC) to reason from the two assumptions that, firstly, we don’t know ¬sh and that, secondly, op entails ¬sh to the conclusion that we don’t know op, where ‘op’ and ‘sh’ are shorthand for ‘ordinary (...) proposition’ and ‘sceptical hypothesis’ respectively. (SKC), however, fails for familiar reasons: since knowledge entails belief (KB), we can derive the falsity (F) from (SKC) by hypothetical syllogism, and thus reduce (SKC) to absurdity: (KB) Kxt[p] → Bxt[p]. (F) (Kxt[p] ∧ (p → q)) → Bxt[q]. (shrink)