Elliott Sober argues that the statistical slogan “Absence of evidence is not evidence of absence” cannot be taken literally: it must be interpreted charitably as claiming that the absence of evidence is (typically) not very much evidence of absence. I offer an alternative interpretation, on which the slogan claims that absence of evidence is (typically) not objective evidence of absence. I sketch a definition of objective evidence, founded in the notion of an epistemically (...) objective likelihood, and I show that in Sober’s paradigm case, the slogan can, on this understanding, be sustained. (shrink)

Subjects perceived touch sensations as arising from a table (or a rubber hand) when both the table (or the rubber hand) and their own real hand were repeatedly tapped and stroked in synchrony with the real hand hidden from view. If the table or rubber hand was then ‘injured’, subjects displayed a strong skin conductance response (SCR) even though nothing was done to the real hand. Sensations could even be projected to anatomically impossible locations. The illusion was much less vivid, (...) as indicated by subjective reports and SCR, if the real hand was simultaneously visible during stroking, or if the real hand was hidden but touched asynchronously. The fact that the illusion could be significantly diminished when the real hand was simultaneously visible suggests that the illusion and associated SCRs were due to perceptual assimilation of the table (or rubber hand) into one’s body image rather than associative conditioning. These experiments demonstrate the malleability of body image and the brain’s remarkable capacity for detecting statistical correlations in the sensory input. (shrink)

The notion that visual attention can operate over visual objects in addition to spatial locations has recently received much empirical support, but there has been relatively little empirical consideration of what can count as an `object' in the ®rst place. We have investi- gated this question in the context of the multiple object tracking paradigm, in which subjects must track a number of independently and unpredictably moving identical items in a ®eld of identical distractors. What types of feature clusters can (...) be tracked in this manner? In other words, what counts as an `object' in this task? We investigated this question with a technique we call target merging: we alter tracking displays so that distinct target and distractor loca- tions appear perceptually to be parts of the same object by merging pairs of items (one target with one distractor) in various ways ± for example, by connecting item locations with a simple line segment, by drawing the convex hull of the two items, and so forth. The data show that target merging makes the tracking task far more dif®cult to varying degrees depending on exactly how the items are merged. The effect is perceptually salient, involving in some conditions a total destruction of subjects' capacity to track multiple items. These studies provide strong evidence for the object-based nature of tracking, con®rming that in some contexts attention must be allocated to objects rather than arbitrary collections of features. In addition, the results begin to reveal the types of spatially organized scene components that can be independently attended as a function of properties such as connectedness, part struc- ture, and other types of perceptual grouping. q 2001 Elsevier Science B.V. All rights reserved. (shrink)

We present work demonstrating that the nature of an object for our visual system depends on the actions we are programming and on the presence of action relations between stimuli. For example, patients who show visual extinction are more likely to become aware of two objects if the objects fall in appropriate visual locations for a common action. This effect of the action relations between objects is modulated both by the familiarity of the positioning of the objects for action, and (...) by the mere possibility of action (the ‘affordance’) between the objects. In addition, the programming of an action to a part of an object alters the representation of that object, making the ‘part’ into the object selected by the visual system. These results point to object coding being a rather flexible process, affected not only by the perceptual properties of stimuli but also by the relations between these properties and action. We discuss the implications for theories of perception as well as considering why action information, in particular, may be important for perception. (shrink)

We describe what seems to be the only objective evidence for the existence of consciousness as an entity beyond its neural correlates. We display this evidence, the nature of observation in quantum mechanics, with a theory-neutral version of the archetypal demonstration of quantum phenomena, the two-slit experiment. This undisputed empirical result provides objective evidence for consciousness, the straightforward alternative being the assumption of not only a completely deterministic world, but a conspiratorial one as well. The objection to (...) this evidence for consciousness, that a not-conscious robot could be the observer, is examined. (shrink)

The Evidence for the Top Quark offers both a historical and philosophical perspective on an important recent discovery in particle physics: evidence for the elementary particle known as the top quark. Drawing on published reports, oral histories, and internal documents from the large collaboration that performed the experiment, Kent Staley explores in detail the controversies and politics that surrounded this major scientific result. At the same time the book seeks to defend an objective theory of scientific evidence (...) based on error probabilities. Such a theory provides an illuminating explication of the points of contention in the debate over the evidence for the top quark. Philosophers wishing to defend the objectivity of the results of scientific research must face unflinchingly the realities of scientific practice, and this book attempts to do precisely that. (shrink)

We all have an intuitive grasp of the concept of evidence. Evidence makes beliefs reasonable, justifies jury verdicts, and helps resolve our disagreements. Yet getting clear about what evidence is is surprisingly difficult. Among other possibilities, evidence might consist in physical objects like a candlestick found at the crime scene, propositions like ‘a candlestick was found at the crime scene,’ or experiences like the experience of witnessing a candlestick at the crime scene. This dissertation is a (...) defense of the latter view. Evidence, we will argue, consists in experiences or mental states called ‘seeming states.’ We begin with a look at why the logical positivists came to abandon the experiential or “phenomenal” conception of evidence and adopted what I call “the courtroom conception.” Despite its appeal, we argue that this latter view is too objective; it has trouble playing the role of subjective reasons-provider. Being more subjective, the phenomenal conception deserves another look. However, many have thought that the phenomenal conception itself is unable to fulfill other important roles of evidence. In chapter two we dispute this, arguing that the phenomenal conception can play all four of the chief roles of evidence. Examining the religious epistemology of Alvin Plantinga in chapter three we come to see that the phenomenal conception, while attractive, is in danger of being too subjective. If the phenomenal conception of evidence is to be tenable, it must be offered in conjunction with a conservative epistemic principle which tethers together experiences with the beliefs they evidence in an epistemically appropriate manner. Hence in chapter four we consider a number of conservative epistemic principles and argue for the superiority of one in particular. But these principles have themselves been subject to criticism. For this reason, in chapter five we close by responding to a recent and pressing challenge to conservative principles in epistemology (Michael Bergmann’s dilemma for internalism) which might prevent their deployment alongside the phenomenal conception. If our arguments are correct, the phenomenal conception of evidence is still an attractive account of evidence today. (shrink)

This essay explores Edmund Husserl's significance for contemporary truth theory. Focusing on his Logical Investigations, it argues that early Husserl's conception of truth unsettles a common polarity between epistemic and nonepistemic approaches. Unlike contemporary epistemic conceptions of truth, he gives full weight to “truth makers” that have their own being: objective identity, perceptible objects, and states of affairs. Yet, unlike contemporary nonepistemic conceptions, he also insists on the intentional givenness of such truth makers and on the complexity of the experiences (...) within which propositional truth claims arise. To develop this argument, the essay explains how early Husserl's conception of truth builds on his phenomenology of intentional experience and knowledge. By emphasizing an objective identity between what is signitively meant and intuitively given, Husserl's approach provides a way to resituate propositional truth within a broader and more dynamic conception of truth. (shrink)

Jon Williamson's Objective Bayesian Epistemology relies upon a calibration norm to constrain credal probability by both quantitative and qualitative evidence. One role of the calibration norm is to ensure that evidence works to constrain a convex set of probability functions. This essay brings into focus a problem for Williamson's theory when qualitative evidence specifies non-convex constraints.

This paper considers the question of whether chimpanzees possess at least a primitive sense of normativity: i.e., some ability to internalize and enforce social norms—rules governing appropriate and inappropriate behaviour—within their social groups, and to make evaluations of others’ behaviour in light of such norms. A number of scientists and philosophers have argued that such a sense of normativity does exist in chimpanzees and in several other non-human primate and mammalian species. However, the dominant view in the scientific and philosophical (...) literature is that psychological capacities for social norms evolved uniquely in the human lineage, after our last common ancestor with chimpanzees and bonobos. After reviewing some of the existing evidence for normative capacity in chimpanzees, I defend the thesis of chimpanzee normativity against three key theoretical objections that have been presented in the literature, each of which have played a part in motivating the dominant sceptical position. I argue that, while we still have much to learn about the nature and extent of the normative capacities of other animals, there is strong prima facie evidence for social norms and normative evaluation in chimpanzees and the main theoretical objections to chimpanzee normativity are not at all compelling. (shrink)

Using the Multiple Object Tracking (MOT) task, Pylyshyn & Leonard (VSS03) showed that a small brief probe dot was detected more poorly when it occurred on a nontarget than when it occurred either on a target or in the space between items, suggesting that moving nontarget items were inhibited. Here we generalize this finding by comparing probe detection performance against a baseline condition in which no tracking was required. We examined both a baseline condition in which objects did not move (...) and one in which they moved exactly as in the probe detection task, but without tracking. Detection in the nonmoving control was essentially error-free, but probe detection performance in the moving (non-tracking) control task did depend on the probe location. Nonetheless, the findings reported earlier (worse detection on nontargets than anywhere else) remained after we took account of the baseline performance (using several different baseline comparison methods). Using this new baseline-control method we also showed that inhibition does not spread more than about 1.3 degrees of visual angle from the nontargets as the latter move during a tracking trial. In the present report we also describe some preliminary studies of conditions under which enhancement of targets, as well as inhibition of nontargets, may be obtained. Increasing the number and type of nontargets appeared to improve the detection of probes on targets, relative to baseline. However, we failed to find evidence that potentially distracting nontarget objects were inhibited more than clearly task-irrelevant objects, as would be expected if inhibition were a top-down process applied in order to improve performance on the main tracking task. For example, using the comparison with its matching baseline, we showed that task-irrelevant stationary items (which are never confused with targets in the tracking task) appeared to be inhibited even more than nontargets. (shrink)

This paper synthesizes convergent lines of evidence to evaluate the hypothesis that objective falsity is essential to lying. Objective accounts of lying affirm this hypothesis; subjective accounts deny it. Evidence from history, logic, social observation, popular culture, lexicography, developmental psychology, inference, spontaneous description, and behavioral experimentation strongly supports the hypothesis. Studies show that the only apparent evidence against the hypothesis is due to task substitution, i.e. ethical concerns or perspective-taking interfering with performance on categorization tasks. I conclude (...) that, overall, existing evidence decisively favors objective accounts. (shrink)

This chapter addresses the question of what makes expressions meaningful according to the conception of meaning offered by Donald Davidson. It addresses this question by reflecting on Kathrin Glüer’s recent response to it. It argues that Glüer misconstrues both the evidence for meaning that the radical interpreter must rely on and the way in which the principle of charity must be deployed. The articulation of the correct construal of the evidence and the principle reveals the thoroughly non-reductionist aspect (...) of Davidson’s conception of meaning. This aspect becomes even clearer in his later work, through the articulation of the triangulation argument. I try to show how this argument, which is reconstructed in accordance with Claudine Verheggen’s interpretation of it, helps answer the initial question. The question whether the conception has the resources to account for the objectivity of meaning is briefly discussed. (shrink)

The paper considers the legal tools that have been developed in German pharmaceutical regulation as a result of the precautionary attitude inaugurated by the Contergan decision. These tools are the notion of “well-founded suspicion”, which attenuates the requirements for safety intervention by relaxing the requirement of a proved causal connection between danger and source, and the introduction of the reversal of proof burden in liability norms. The paper focuses on the first and proposes seeing the precautionary principle as an instance (...) of the requirement that one should maximise expected utility. In order to maximise expected utility certain probabilities are required and it is argued that objective Bayesianism offers the most plausible means to determine the optimal decision in cases where evidence supports diverging choices. (shrink)

in press, Psychonomic Bulletin & Review.

This essay offers an account of the truth conditions of sentences involving deontic modals like ‘ought’, designed to capture the difference between objective and subjective kinds of ‘ought’ This account resembles the classical semantics for deontic logic: according to this account, these truths conditions involve a function from the world of evaluation to a domain of worlds (equivalent to a so-called “modal base”), and an ordering of the worlds in such domains; this ordering of the worlds itself arises from two (...) further elements – a probability function and a value function – since this ordering ranks the worlds in accordance with the expected value of certain propositions that are true at those worlds. Thus, a proposition of the form ‘Ought (p)’ is true at a world of evaluation w if and only if p is true at all the top-ranked worlds in the domain assigned to w. This domain of worlds consists of metaphysically possible worlds, while the probability function is defined over a space of epistemically possible worlds (which may include metaphysically impossible worlds, such as worlds where Hesperus is not Phosphorus). Evidence is given that this account assigns the correct truth conditions to a wide range of sentences involving ‘ought’. Since these truth conditions involve both a domain of metaphysically possible worlds and a space of epistemically possible worlds, there are two corresponding kinds of conditional involving ‘ought’, depending on which space of worlds is restricted by the conditional. Finally, some objections that might be raised against this account are answered. (shrink)

This thesis seeks to develop the account of natural language semantics found in the work of Donald Davidson. Special attention is given to the empirical character of theories of meaning, and Quine's theses of translational and referential indeterminacy are examined for their bearing on this. It is argued that a strict form of Davidson's principle of charity plays the essential role in making these theories empirical. The formal modifications Davidson makes to Tarski in the course of structuring theories of meaning (...) after Tarskian theories of truth are identified and a modified version of Convention T is provided. On the basis of the account of interpretation thus developed, the case is made that Davidson's argument against global skepticism is inadequate unless supplemented with his argument against incommensurable conceptual schemes. This latter argument is defended as being an argument for a notion of objectivity which rules out any interesting sort of correspondence theory of truth. (shrink)

Religion is often singled out for special legal treatment in Western societies - which raises an important question: what, if anything, is special about religious conscience beliefs that warrants such special legal treatment? In this paper, I will offer an answer to this specialness question by investigating the relationship between religious conscientious objections and their insulation from relevant evidence. I will begin my analysis by looking at Brian Leiter’s arguments that religious beliefs are insulated from evidence and (...) not worthy of special legal treatment as a result. I will argue that he fails to show that religious conscience beliefs are both in principle responsive to empirical evidence and in practice typically more insulated from this evidence than secular conscience beliefs. If I am right about this, then Leiter fails to answer the “central puzzle” of his recent book and fails to sufficiently distinguish the religious conscience from the secular conscience. Second, I will look at whether or not it is plausible to understand the religious conscience as insulated from other forms of evidence. Following the research of social-psychologist Jonathan Haidt, I will argue that, typically, both forms of conscience seem to be similarly insulated from moral argumentation. I will also show that, while it seems as though the religious conscience usually draws from a larger set of moral values when compared to the secular conscience, this should make no legal difference overall. To conclude, I will explain that the arguments in this paper can be understood as evidence in support of an egalitarian response to religion’s specialness. (shrink)

Chastain and Sawyer, among others, claim that direct cognitive relations can be initiated in evidence cases. Direct cognitive relations will here include Chastain’s knowledge-of and Sawyer’s trace-based acquaintance, as well as related notions such as having-in-mind and singular thought. Against this controversial claim, it is often objected that such cases are better understood as cases of inference rather than cases of direct thought. When one detects something by its footprint, the objection goes, one merely infers that it exists rather (...) than thinking of it directly. The goal of this paper is to analyze what is meant by the inference objection and consider several possible responses to it. Ultimately, I will not offer a knock-down argument against the inference explanation; in fact, I’ll try to explain why I suspect one isn’t possible. Instead, I’ll appeal to the possibility of misdescription and analogous cases involving non-human animals to show that the inference explanation is less plausible than the account to which it provides an alternative. (shrink)

I argue that although the judgments required to reach statistical risk assessments may reflect policy values, it does not follow that the task of evaluating whether a given risk assessment is warranted by the evidence need also be imbued with policy values. What has led many to conclude otherwise, I claim, stems from misuses of the statistical testing methods involved. I set out rules for interpreting what specific test results do and do not say about the extent of a (...) given risk. By providing a more objective understanding of the evidence, such rules help in adjudicating conflicting risk assessments. To illustrate, I consider the risk assessment conflict at the EPA concerning the carcinogenicity of formaldehyde. (shrink)

For an object to be multilocated is for it to wholly occupy disjoint spatial regions simultaneously. If multilocation is possible, it is possible that a multilocated particle is wholly located at 1080 distinct locations, such that it constitutes a particle-for-particle duplicate of the actual universe. Such a universe would presumably be perceptually identical to the actual universe. If we take multilocation as possible, we are thus presented with two accounts between which our perceptual evidence cannot adjudicate: one wherein the (...) universe is constituted by many particles and another wherein it is constituted by one radically multilocated particle. Parsimony concerns dictate that the latter is the more rational to accept. Since this is absurd, we should reject that multilocation is possible. Mooney responds to the problem by arguing that distinct location is evidence of non-identity, even if acceptance of the possibility of multilocation entails that this evidence is not decisive. If this is right, then the evidence favors a theory featuring many particles. In this paper, I contend that our commitment to taking distinct location as evidence of nonidentity is motivated by a more fundamental intuition that does not apply in the relevant context. (shrink)