Wayne A. Davis, Implicature: Intention, Convention, and Principle in the Failure of Gricean Theory

[First Paragraph] In his recent book, Implicature: Intention, Convention, and Principle in the Failure of Gricean Theory (1998), Wayne Davis argues that the Gricean approach to conversational implicature is bankrupt and offers a new approach of his own. Although I disagree with Davis both in general and in detail, I think nonetheless that the problems he raises'or close relatives of them-- are serious and important problems which should give any Gricean pause. This is an extremely worthwhile book, even for those who disagree with it

Speaker meaning, what is said and what is implicated

[First Paragraph] Unlike so many other distinctions in philosophy, H P Grice's distinction between what is said and what is implicated has an immediate appeal: undergraduate students readily grasp that one who says 'someone shot my parents' has merely implicated rather than said that he was not the shooter [2]. It seems to capture things that we all really pay attention to in everyday conversation'this is why there are so many people whose entire sense of humour consists of deliberately ignoring implicatures. ('Can you pass the salt?' 'Yes.') Unsurprisingly, it was quickly picked up and put to a wide variety of uses in not only in philosophy but also in linguistics and psychology. What is surprising, however, is that upon close inspection Grice's conception of implicature turns out to be very different from those at work in the literature which has grown out of his original discussion. This would not be much of a criticism of this literature were it not for the fact that discussions of implicature explicitly claim to be using Grice's notion, not some other one inspired by him (generally going so far as to quote one of Grice's characterisations of implicature). This still would not be terribly interesting if the notion Grice was actually carving out had little theoretical or practical utility. But I will argue here that Grice's own notion of implicature, one quite different from the ones most of us have come to work with, is in fact far more interesting and subtle than that which has been attributed to him

Simple sentences, substitutions, and mistaken evaluations

Many competent speakers initially judge that (i) is true and (ii) is false, though they know that (iii) is true. (i) Superman leaps more tall buildings than Clark Kent. (ii) Superman leaps more tall buildings than Superman. (iii) Superman is identical with Clark Kent. Semantic explanations of these intuitions say that (i) and (ii) really can differ in truthvalue. Pragmatic explanations deny this, and say that the intuitions are due to misleading implicatures. This paper argues that both explanations are incorrect. (i) and (ii) cannot differ in truth-value, yet the intuitions are not due to implicatures, but rather to mistakes in evaluating (i) and (ii)

Racial Figleaves, the Shifting Boundaries of the Permissible, and the Rise of Donald Trump

The rise to power of Donald Trump has been shocking in many ways. One of these was that it disrupted the preexisting consensus that overt racism would be death to a national political campaign. In this paper, I argue that Trump made use of what I call "racial figleaves"—additional utterances that provide just enough cover to give reassurance to voters who are racially resentful but don't wish to see themselves as racist. These figleaves also, I argue, play a key role in shifting our norms about what counts as racist: they bring it about that something which would previously have been seen as revealing obvious racism is now seen as the sort of thing that a nonracist might say. This gives them tremendous power to corrupt not just our political discourse but our culture more broadly

Are Generics Especially Pernicious?

In recent years, both within and outside philosophy, the idea has taken hold that generics play a special role in perpetuating social injustice. Sarah-Jane Leslie’s work, and Sally Haslanger’s building on it, have led to an increasingly widespread belief that the use of generic expressions plays a crucial role in passing on and shoring up racist and sexist beliefs and ideologies. I have started to hear feminists catching themselves using generic terms to describe social groups, and trying to rephrase their utterances at conferences, citing Haslanger’s and Leslie’s work as the reason. But, as I will explain here, I think we do not yet have good reason to think that we should single out generics about social groups out as peculiarly destructive, or that we should strive to eradicate them from our usage. Indeed, I think they continue to serve a very valuable purpose and we should not rush to condemn them. I view the current attention to generics as a mistake in the battle against prejudice. This is not because they pose no problems − they do pose problems (though I am not yet convinced about many of the problems claimed by Leslie and Haslanger). But so do many other closely related constructions. If we focus our energies on avoiding generics, substituting other phrases that we (wrongly) take to be innocuous, we will be making a serious error. Instead, we need to think much harder about how to confront many sorts of utterances which make reference to social groups

Why so few women in value journals? How could we find out?

This paper takes as its starting place Meena Krishnamurthy's discussion in this issue of women's underrepresentation in "elite" value journals. Her paper discusses a specific remedy: quotas. My paper focuses instead on the causal issue of explanations for women's underrepresentation in these journals. I argue that we currently lack the data that would allow us to choose between various hypotheses (or combinations of hypotheses), and I sketch the sorts of investigations that would be needed to further our understanding of the causes for this underrepresentation

Comparing initial-data sets for binary black holes

We compare the results of constructing binary black hole initial data with three different decompositions of the constraint equations of general relativity. For each decomposition we compute the initial data using a superposition of two Kerr-Schild black holes to fix the freely specifiable data. We find that these initial-data sets differ significantly, with the ADM energy varying by as much as 5% of the total mass. We find that all initial-data sets currently used for evolutions might contain unphysical gravitational radiation of the order of several percent of the total mass. This is comparable to the amount of gravitational-wave energy observed during the evolved collision. More astrophysically realistic initial data will require more careful choices of the freely specifiable data and boundary conditions for both the metric and extrinsic curvature. However, we find that the choice of extrinsic curvature affects the resulting data sets more strongly than the choice of conformal metric.Comment: 18 pages, 12 figures, accepted for publication in Phys. Rev.

Impact of a quadrivalent meningococcal ACWY glycoconjugate or a serogroup B meningococcal vaccine on meningococcal carriage: an observer-blind, phase 3 randomised clinical trial

Background: Meningococcal conjugate vaccines protect individuals directly, but also confer herd protection by interrupting carriage transmission. This Phase III observer-blind, randomised, controlled study evaluated the effects of meningococcal quadrivalent (ACWY) glycoconjugate (MenACWY-CRM) or serogroup B (4CMenB) vaccination on meningococcal carriage rates in young adults. Methods: University students (aged 18–24 years) from ten sites in England were randomised to receive two vaccinations one month apart: two doses of Japanese Encephalitis vaccine (controls), two doses of 4CMenB (4CMenB), or one dose of MenACWY-CRM then placebo (MenACWY-CRM). Meningococci were isolated from oropharyngeal swabs collected before vaccination and at five scheduled intervals over one year. Primary analysis was cross-sectional carriage one month after the vaccine course; secondary analyses included comparison of carriage at any time point after primary analysis until study termination. Findings: 2954 subjects were randomised (control, n=987; 4CMenB, n=988; MenACWY-CRM, n=979); approximately one-third of each group was positive for meningococcal carriage at study entry. By one month, there was no significant difference in carriage between controls and 4CMenB (Odds Ratios (OR) [95% CI]; 1·2 [0·8−1·7]) or MenACWY-CRM (OR [95% CI], 0·9 [0·6–1·3]) groups. From three months after dose two, 4CMenB vaccination resulted in significantly lower carriage of any meningococcal strain (calculated efficacy 18·2% [95% CI: 3·4–30·8]) and capsular groups BCWY (calculated efficacy 26·6% [95% CI: 10·5–39·9]) compared to control vaccination. Significantly lower carriage rates were also observed in the MenACWY-CRM group compared with controls: calculated efficacies 39·0% [95%CI: 17·3-55·0] and 36.2% [95%CI: 15·6-51·7] for serogroups Y and CWY, respectively. Interpretation: MenACWY-CRM and 4CMenB vaccines reduced meningococcal carriage rates over 12 months post-vaccination and, therefore, may affect transmission where widely implemented

Functional responses can unify invasion ecology.

We contend that invasion ecology requires a universal, measurable trait of species and their interactions with resources that predicts key elements of invasibility and ecological impact; here, we advocate that functional responses can help achieve this across taxonomic and trophic groups, among habitats and contexts, and can hence help unify disparate research interests in invasion ecology

A trophic interaction framework for identifying the invasive capacity of novel organisms

1. The likelihood and impacts of invasions by novel organisms (e.g. non-native species, genetically modified organisms) on the composition and functioning of receiving biological communities hinges on their capacity to exploit resources and/or avoid predation relative to resident counterparts. While assessment of invasion risk based on the comparison of functional responses (per-capita consumption rate as a function of resource density) of novel species with native analogues has been gaining popularity, it may be undermined if alternative prey and potential predators are not represented realistically. 2. Here, we propose a conceptual framework that enables rigorous identification of trophic traits conducive to invasion success by novel organisms—irrespective of their trophic position—and their likely ecological impacts, given their arrival and establishment. We focus on consumption here, but our framework can also be used for autotrophic energy acquisition, and extended to non-trophic and indirect interactions. 3. The framework enables a structured and prioritized selection of subsets of trophic links for invasion risk assessment. It is based on foraging theory and advances in comparative functional responses in invasion ecology. It can even be used in the absence of a resident comparator organism and when resources or predators are only partly known. 4. Our approach enhances the predictive power of species screening, and thus advances prevention and management of invasions under a common framework for all types of novel organisms