Deepfakes are realistic videos created using new machine learning techniques rather than traditional photographic means. They tend to depict people saying and doing things that they did not actually say or do. In the news media and the blogosphere, the worry has been raised that, as a result of deepfakes, we are heading toward an “infopocalypse” where we cannot tell what is real from what is not. Several philosophers have now issued similar warnings. In this paper, I offer an analysis (...) of why deepfakes are such a serious threat to knowledge. Utilizing the account of information carrying recently developed by Brian Skyrms, I argue that deepfakes reduce the amount of information that videos carry to viewers. I conclude by drawing some implications of this analysis for addressing the epistemic threat of deepfakes. (shrink)

This paper analyses the communicative and epistemic value of retweeting (and more generally of reposting content on social media). Against a naïve view, it argues that retweets are not acts of endorsement, motivating this diagnosis with linguistic data. Retweeting is instead modelled as a peculiar form of quotation, in which the reported content is indicated rather than reproduced. A relevance-theoretic account of the communicative import of retweeting is then developed, to spell out the complex mechanisms by which retweets achieve their (...) communicative goals. The last section outlines the epistemic threats posed by the increasing prevalence of retweeting on social media, linking them to the low reputational, cognitive and practical costs linked to this emerging form of communication. (shrink)

Our understanding of communication and its evolution has advanced significantly through the study of simple models involving interacting senders and receivers of signals. Many theorists have thought that the resources of mathematical information theory are all that are needed to capture the meaning or content that is being communicated in these systems. However, the way theorists routinely talk about the models implicitly draws on a conception of content that is richer than bare informational content, especially in contexts where false content (...) is important. This article shows that this concept can be made precise by defining a notion of functional content that captures the degree to which different states of the world are involved in stabilizing senders’ and receivers’ use of a signal at equilibrium. A series of case studies is used to contrast functional content with informational content, and to illustrate the explanatory role and limitations of this definition of functional content. _1_ Introduction _2_ Modelling Framework _3_ Two Kinds of Content _3.1_ Informational content _3.2_ Functional content _4_ Cases _4.1_ Case 1: Simplest case _4.2_ Case 2: Partial pooling _4.3_ Case 3: Bottleneck _4.4_ Case 4: Partial common interest _4.5_ Case 5: Deception _4.6_ Case 6: A further problem arising from divergent interests _5_ Discussion Appendix. (shrink)

I argue that riskier killings of innocent people are, other things equal, objectively worse than less risky killings. I ground these views in considerations of disrespect and security. Killing someone more riskily shows greater disrespect for him by more grievously undervaluing his standing and interests, and more seriously undermines his security by exposing a disposition to harm him across all counterfactual scenarios in which the probability of killing an innocent person is that high or less. I argue that the salient (...) probabilities are the agent’s sincere, sane, subjective probabilities, and that this thesis is relevant whether your risk-taking pertains to the probability of killing a person or to the probability that the person you kill is not liable to be killed. I then defend the view’s relevance to intentional killing; show how it differs from an account of blameworthiness; and explain its significance for all-things-considered justification and justification under uncertainty. (shrink)

Deception has recently received a significant amount of attention. One of main reasons is that it lies at the intersection of various areas of research, such as the evolution of cooperation, animal communication, ethics or epistemology. This essay focuses on the biological approach to deception and argues that standard definitions put forward by most biologists and philosophers are inadequate. We provide a functional account of deception which solves the problems of extant accounts in virtue of two characteristics: deceptive states have (...) the function of causing a misinformative states and they do not necessarily provide direct benefits to the deceivers and losses to the targets. (shrink)

1. Lying -- 2. The problem of what is said -- 3. What is said -- 4. Is lying worse than merely misleading? -- 5. Some interesting cases.

The traditional view of lying holds that this phenomenon involves two central components: stating what one does not believe oneself and doing so with the intention to deceive. This view remained the generally accepted view of the nature of lying until very recently, with the intention-to-deceive requirement now coming under repeated attack. In this article, I argue that the tides have turned too quickly in the literature on lying. For while it is indeed true that there can be lies where (...) there is no intention on the part of the speaker to deceive the hearer, this does not warrant severing the connection between lying and deception altogether. Thus, I defend the following account of lying: A lies to B if and only if (1) A states that p to B, (2) A believes that p is false, and (3) A intends to be deceptive to B in stating that p. (shrink)

Among the various methods of deceit, lying is often thought to be a special affront on the grounds that it invites the victim’s trust. Such an explanation is incomplete without an account of the moral significance of trust. This article distinguishes two morally problematic relations to trust, betrayals and abuses, and, appealing to the idea that we should be grateful to be trusted, attempts to explain these wrongs as violations of distinct demands of gratitude for trust. Only the wrong of (...) abuse, not betrayal, is useful for distinguishing methods of deceit. Although lying commits an abuse of trust, it turns out that it is really the broader category of deceit by means of communication that is special in this way. -/- . (shrink)

In this article I consider six definitions of deceiving (that is, other-deceiving, as opposed to self-deceiving) from Lily-Marlene Russow, Sissela Bok, OED/Webster's dictionary, Leonard Linsky, Roderick Chisholm and Thomas Feehan, and Gary Fuller, and reject them all, in favor of a modified version of a rejected definition (Fuller). I also defend this definition from a possible objection from Annette Barnes. According to this new definition, deceiving is necessarily intentional, requires that the deceived person acquires or continues to have a false (...) belief, and must involve the agency of the deceived person; furthermore, the deceiver must know or truly believe that the false belief that the deceived person acquires or continues to have is false. (shrink)

The concept of evidence is among the central concerns of epistemology broadly construed. As such, it has long engaged the intellectual energies of both philosophers of science and epistemologists of a more traditional variety. Here I briefly survey some of the more important ideas to have emerged from this tradition of reflection. I then look somewhat more closely at an issue that has recently come to the fore, largely as a result of Williamson's Knowledge and Its Limits: that of whether (...) one's evidence supervenes on one's non-factive mental states. (shrink)

The concept of evidence is central to both epistemology and the philosophy of science. Of course, ‘evidence’ is hardly a philosopher's term of art: it is not only, or even primarily, philosophers who routinely speak of evidence, but also lawyers and judges, historians and scientists, investigative journalists and reporters, as well as the members of numerous other professions and ordinary folk in the course of everyday life. The concept of evidence would thus seem to be on firmer pre-theoretical ground than (...) various other concepts which enjoy similarly central standing within philosophy. (Contrast, for example, the epistemologist's quasi-technical term ‘epistemic justification’.). (shrink)

Intuitively, Gettier cases are instances of justified true beliefs that are not cases of knowledge. Should we therefore conclude that knowledge is not justified true belief? Only if we have reason to trust intuition here. But intuitions are unreliable in a wide range of cases. And it can be argued that the Gettier intuitions have a greater resemblance to unreliable intuitions than to reliable intuitions. Whats distinctive about the faulty intuitions, I argue, is that respecting them would mean abandoning a (...) simple, systematic and largely successful theory in favour of a complicated, disjunctive and idiosyncratic theory. So maybe respecting the Gettier intuitions was the wrong reaction, we should instead have been explaining why we are all so easily misled by these kinds of cases. (shrink)

The paper focuses on the nature and moral status of manipulation. I analyse a popular account of manipulation by Robert Noggle and assess a challenge that has been posed by Moti Gorin. I argue that Noggle’s theory can fend off the challenge. The analysis is instructive in that it enables one to look more closely at the nature of manipulation. I argue, contrary to some proposed accounts, that manipulation essentially involves deception about the manipulator’s intentions. Secondly, since manipulation contains an (...) element of deception, it is, I maintain, prima facie immoral. Finally, I analyse and explain away several examples of allegedly morally non-problematic manipulation. (shrink)

In his 2018 AJP paper, Shlomo Cohen hints that deception could be a distinct subset of manipulation. We pursue this thought further, but by arguing that Cohen’s accounts of deception and manipulation are incorrect. Deception under uncertainty need not involve adding false premises to the victim’s reasoning but it must involve manipulating her response, and cases of manipulation that do not interfere with the victim’s reasoning, but rather utilize it, also exist. Therefore, deception under uncertainty must be constituted by covert (...) manipulation. (shrink)

ABSTRACTThis paper introduces the category of ‘non-deceptive manipulation that causes false beliefs’, analyzes how it narrows the traditional scope of ‘deception’, and draws moral implications.

I argue that lying is generally morally better than mere deliberate misleading because the latter involves the exploitation of a greater trust and more seriously abuses our willingness to fulfil epistemic and moral obligations to others. Whereas the liar relies on our figuring out and accepting only what is asserted, the mere deliberate misleader depends on our actively inferring meaning beyond what is said in the form of conversational implicatures as well. When others’ epistemic and moral obligations are determined by (...) standard assumptions of communicative cooperation and no compelling moral reason justifies mere deliberate misleading instead, one had better lie. (shrink)

A central debate in the ethics of deception concerns the moral comparison among the three media through which deception is executed: lying, falsely implicating, or nonlinguistic deception. The two prominent views are that lying is morally worse or that the choice of medium is morally insignificant. This article refutes both and argues for a new position. The article first presents a theory on the moral significance of the medium of deception as such: it argues that the medium of communication affects (...) the reliability of beliefs formed through it, which amounts to gradations in the warrant of truth of different media. Breach of lower warrant of truth is a lesser breach of trust; it therefore deserves lighter condemnation. Consequently, the article shows that, morally speaking, lying is either worse than or equal to falsely implicating and that there is no a priori gradation between nonlinguistic deception and the two linguistic media. (shrink)

Exactly what makes an interaction between two organisms a case of communication is contentious. Historically, debate has taken place between definitions of communication invoking information transmission vs definitions invoking causal influence. More recently, there has been some convergence on a hybrid definition: invoking causal influence mediated via the transmission of information. After proposing an understanding of what it means to say that a receiver is causally influenced by the transmission of information, I argue that an information-mediated influence definition overextends to (...) include most, indeed maybe all, co-adapted interactions. This is because the transmission of correlational information is actually a feature of most, if not all, co-adapted interactions. I end by considering whether adding an arbitrariness criterion to an information-mediated influence definition helps. After giving an account of what arbitrariness amounts to, I argue that it swings things too far in the opposite direction: we go from a definition of communication that is too liberal to one that is too restrictive. This is because many signal kinds are not arbitrary. It turns out to be extremely difficult to capture what makes communication unique. (shrink)

Philosophers have based arguments on the contention that we arc deceived in our dreams. I argue that we are not, and that this can be shown by considerations concerning the meaning? of the word ?deceive?. This kind of argument, common in recent philosophy, has been much criticized. In a methodological digression (sections 2?6), some aspects of the nature, the rationale, and the relevance of the appeal to ordinary language in philosophy are exposed and defended. The paper presents an analysis of (...) the meaning of the word ?deceive? by way of a list of necessary conditions for the semantically nondeviant occurrences of utterances containing it. It is shown that the philosophical uses in question do not satisfy these conditions. (shrink)

What is it to deceive someone? And how is it possible to deceive oneself? Does self-deception require that people be taken in by a deceitful strategy that they know is deceitful? The literature is divided between those who argue that self-deception is intentional and those who argue that it is non-intentional. In this study, Annette Barnes offers a challenge to both the standard characterisation of other-deception and current characterizations of self-deception, examining the available explanations and exploring such questions as the (...) self-deceiver's false consciousness, bias, and the irrationality and objectionability of self-deception. She arrives at a non-intentional account of self-deception that is deeper and more complete than alternative non-intentional accounts and avoids the reduction of self-deceptive belief to wishful belief. (shrink)

I have argued elsewhere that in past history, freedom of speech, whether granted to few or many, was granted as bestowing some important benefit. John Stuart Mill, for example, in On Liberty, saw it as enabling us to learn from each other through discussion. By the test of benefit, I here argue that social media that are funded through trade in our personal data with advertisers, including propagandists, cannot claim to be supporting free speech. We lose our freedoms, if the (...) personal data we entrust to online social media are used to target us with information, or disinformation, tailored as persuasive to different personalities, in order to maximize revenue from advertisers or propagandists. Among the serious consequences described, particularly dangerous because of its effect on democracy, is the use of such targeted advertisements to swing voting campaigns. Control is needed both of the social media and of any political parties that pay social media for differential targeting of voters based on personality. Using UK government documents, I recommend legislation for reform and enforcement. (shrink)

Sorensen offers the following definition of a ‘knowledge-lie’: ‘An assertion that p is a knowledge-lie exactly if intended to prevent the addressee from knowing that p is untrue but is not intended to deceive the addressee into believing p.’ According to Sorensen, knowledge-lies are not meant to deceive their addressee, and this fact is supposed to make them less bad than ordinary lies. I will argue that standard cases of knowledge-lies, including almost all the cases Sorensen considers, do in fact (...) involve deception, contrary to what Sorensen claims. And while there are cases of non-deceptive knowledge-lies, such cases are deviant, either because it is only incidental that the knowledge-preventing assertion is a lie, or because it is only incidental that the lie doesn't deceive. Here's an example of a knowledge-lie: Dr Head is considering firing Dr Appendix because of his weak research. But he doesn't want to fire Appendix unless he knows that Appendix's research isn't good, and so he consults Dr Heart. Head knows that if Appendix's research is good, then Heart will tell the truth and say so, whereas if Appendix's work isn't good, then Heart may or may not …. (shrink)