Three plausible views—Presentism, Truthmaking, and Independence—form an inconsistent triad. By Presentism, all being is present being. By Truthmaking, all truth supervenes on, and is explained in terms of, being. By Independence, some past truths do not supervene on, or are not explained in terms of, present being. We survey and assess some responses to this.

We describe the earliest occurrences of the Liar Paradox in the Arabic tradition. e early Mutakallimūn claim the Liar Sentence is both true and false; they also associate the Liar with problems concerning plural subjects, which is somewhat puzzling. Abharī (1200-1265) ascribes an unsatisfiable truth condition to the Liar Sentence—as he puts it, its being true is the conjunction of its being true and false—and so concludes that the sentence is not true. Tūsī (1201-1274) argues that self-referential sentences, like the (...) Liar, are not truth-apt, and defends this claim by appealing to a correspondence theory of truth. Translations of the texts are provided as an appendix. (shrink)

Al-Taftāzānī introduces the Liar Paradox, in a commentary on al-Rāzī, in a short passage that is part of a polemic against the ethical rationalism of the Muʿtazila. In this essay, we consider his remarks and their place in the history of the Liar Paradox in Arabic Logic. In the passage, al-Taftāzānī introduces Liar Cycles into the tradition, gives the paradox a puzzling name—the fallacy of the “irrational root” —which became standard, and suggests a connection between the paradox and what it (...) tells us about truth and falsehood, and arguments for divine voluntarism and what they tell us about the nature of goodness and badness. On this last point, we also discuss a passage from al-Rāzī, which suggests similar connections. (shrink)

In an article in an earlier issue of this journal Vivienne Gray sought to challenge my claim that Xenophon's account of Prodicus' narrative concerning the Choice of Heracles represents ‘a very close approximation to Prodicus’ actual wording'. Since that time, Gray's article has been cited approvingly by Louis-André Dorion and David Wolfsdorf, both of whom consider that Gray has settled the matter, at least as far as the linguistic aspect of my argument is concerned. In view of this, I (...) feel it necessary to point out that Gray's argument is fundamentally flawed. In addition, I should like to take this opportunity to show that the arguments of Dorion and Wolfsdorf, which are aimed at other aspects of the case that I made for Xenophon's faithfulness to Prodicus' text, are likewise invalid. (shrink)

The article seeks to show that, contrary to the standard view, the 'Choice of Heracles' preserved at Xen. Mem. 2.1.21-33 is not a summary or paraphrase, but is a very close approximation to the actual wording of Prodicus' epideixis. The language and style are shown to be uncharacteristic of Xenophon, and the fact that Prodicus' original was known to exist in both written and orally performed versions serves to explain why the piece is framed by language that disclaims strict accuracy (...) in reproducing it. It is further shown that the way in which near-synonyms are used in the piece is not necessarily inconsistent with other evidence for Prodicus' practice: it is rather the personified character Vice whose usage conflicts with that of Prodicus himself and with that of the personification of Virtue. Finally, it is proposed that the 'Choice of Heracles' represented the contents, not of Prodicus' advanced teaching, but of the popular, cut-rate lecture intended for a general audience. (shrink)

The authors consider a recurring objection to fictional realism, the view that fictional characters are objects. The authors call this the counting objection. Russell presses a version of the objection against Meinong’s view. Everett presses a version of the objection against contemporary fictional realist views, as do Nolan and Sandgren. As the authors see it, the objection assumes that the fictional realist must provide criteria of identity for fictional characters, so its force depends on the plausibility of that assumption. Rather (...) than coming up with such criteria, a fictional realist might argue that the demand is misplaced. (shrink)

The possibility of Junk is the possibility that something exists and everything is a proper part. Just as we might imagine that there are no simples—that everything has a proper part, all the way down—we might imagine that there are no caps—that everything is a proper part, all the way up. It is not obvious that this apparent possibility can be accommodated within a Lewisian modal framework. For Lewis, every possibility involves the existence of a possible world, and a possible (...) world is just is a maximal sum, and so a cap. But the Lewisian can accommodate Junk, if she wishes, by allowing parts of possible worlds to represent complete possibilities. (shrink)

We want to say both that Sherlock Holmes does not exist, and that he is a fictional character. But how can we say these things without committing ourselves to the existence of Sherlock Holmes? Here I develop and defend a non-commital paraphrase of quantification over fictional characters, modeled on the non-commital paraphrase Kit Fine provides for quantification over possibilia. I also develop and defend the view that names for fictional characters are weakly non-referring, in Nathan Salmon’s sense, and so provide (...) us with a non-commital means to express singular propositions. The resulting position allows us to reap the benefits of Fictional Realism without paying the associated ontological cost. (shrink)

If reality is temporary, then reality changes, and if reality changes, the past has explanatory work to do, and it cannot do that work unless it is no longer real. This tells against the Moving Now Theory, the Growing Block Theory, and any form of Presentism that attempts to understand the past in terms of the present, including Tensed Properties Presentism and Tensed Facts Presentism. It tells in favor of a form Presentism that allows us to appeal to unreal past (...) facts. I suggest that Priorian Presentism, conjoined with a certain way of understanding the role played by tense operators, is one such view. (shrink)

Possible worlds are maximal possibilities. But what kind of thing is a maximal possibility? Not a maximal individual: there are maximal possibilities that are not maximal individuals, because each maximal individual could have any one of several maximal properties. And not a maximal property: there are maximal possibilities that are not maximal properties, because each maximal property could be had by any one of many possible maximal individuals. So if you like your worlds concrete, you should say that they are (...) maximal facts, and if you like your worlds abstract, you should say that they are maximal propositions. (shrink)

At Ar. Ran. 1028 read ην ηκoυσ ɛυχην for the metrically defective ηνικ' ηκoυσα.

The ghost of Darius provides a versified history of the Persian kingship, from the beginning down to the reign of his luckless son Xerxes, that starts out as follows in Martin West's Teubner text :Mῆδος γὰρ ἦν ὁ πρῶτος ἡγεμὼν στρατοῦ, 765ἄλλος δ’ ἐκείνου παῖς τόδ’ ἔργον ἥνυσεν·ϕρένες γὰρ αὐτοῦ θυμὸν ᾠακοστρόϕουν·τρίτος δ’ ἀπ’ αὐτοῦ Κῦρος, εὐδαίμων ἀνήρ,ἄρξας ἔθηκε πᾶσιν εἰρήνην ϕίλοις,Λυδῶν δὲ λαὸν καὶ Φρυγῶν ἐκτήσατο 770Ἰωνίαν τε πᾶσαν ἤλασεν βίᾳ·θεὸς γὰρ οὐκ ἤχθηρεν, ὡς εὔϕρων ἔϕυ.Κύρου δὲ παῖς τέταρτος (...) ηὔθυνε στρατόν·πέμπτος δὲ Mάρδος ἦρξεν, αἰσχύνη πάτρᾳθρόνοισί τ’ ἀρχαίοισι· 775First comes ‘the Mede Cyaxares, whom A[eschylus] probably saw as the first king of a united Media and Persia, and therefore the right person to begin his list’. Unless ἄλλος is corrupt, the first two members of the dynasty are anonymous. This is not perhaps surprising, given Aeschylus’ limited knowledge of early Median and Persian history and given his use of these rulers as foils to the blest Cyrus. Each of them is, like the equally anonymous Cambyses, accorded only one or two lines, in contrast to the five lines devoted to Cyrus the Great. What is surprising is that the second of these is singled out for his good sense and his restraint. Further, it is not clear what point is being made by attributing ‘this deed’ to the good sense and restraint of the son of the Mede, particularly since it is not immediately apparent to what deed reference is being made. As Alexander Garvie notes in his recent commentary on the play, ‘That this line [767] is out of place in the codd. is highly likely’. (shrink)

In response to Mnesilochus′ disparaging comments regarding Agathon's unusual dress, the tragic poet replies:.

Odysseus has just entered the acting area following the choral song, during which he witnessed the Cyclops butchering, cooking and then eating two of his companions. In these lines Odysseus seemingly presents himself as being at a loss for words, and claims that what he witnessed inside the cave is not to be believed. These are, of course, nothing more than rhetorical ploys, with frequent parallels in Euripides and elsewhere. When Odysseus says οὐ πιστά he means not that what he (...) is about to recount lacks credibility—he does, after all, expect the satyrs to accept his account as reliable—but that it surpasses the bounds of ordinary human experience. And the account that follows belies his apparent profession of being at a loss for words, since he is about to deliver what is in effect a messenger-speech of over fifty lines. Expressions of aphasia are common in Euripides, sometimes accompanied, as here, by lengthy exposition. Characters use such expressions to indicate that the circumstances in which they find themselves are beyond the power of language to convey. There is, therefore, something discordant in Odysseus immediately following his expression of aphasia by saying that what he has witnessed is ‘like stories’, especially when he is about to tell the story of the circumstances in which he finds himself. It is the purpose of this note to suggest that the words μύθοις εἰκότ’ have been universally misunderstood, and that Odysseus is here saying something quite other than that the events in the cave have a greater resemblance to stories than to reality. (shrink)

The paper examines Simplicius's doctrine of propensities in his commentary on Aristotle's Categories and follows its application by the late thirteenth century theologian and philosopher James of Viterbo to problems relating to the causes of volition, intellection and natural change. Although he uses Aristotelian terminology and means his doctrine to conflict minimally with those of Aristotle, James's doctrine of propensities really constitutes an attempt to provide a technically rigorous dressing to his Augustinian and Boethian convictions. Central to James's procedure is (...) his rejection, following Henry of Ghent, of the principle that “everything that is moved is moved by another”. James uses Simplicius' doctrine of propensities as a means of extending the rejection of that principle, which Henry had limited to the case of the will, to cognitive operations and natural change. The result is a theory of cognition and volition that sees the soul as the principal cause of its own acts, and a theory of natural change that minimizes the causal impact of external agents. (shrink)

This has all the appearance of being a straightforward, even conventional, transition. Indeed, the conceit of Night′s chariot is common and has a history stretching back at least as far as the beginning of the fifth century B.C. Night is elsewhere described by Virgil as umida, the epithet reflecting the traditional view that Night, like Dawn , arises from and sinks back into the stream of Ocean. In fact, the chariot of Night had been referred to as recently as lines (...) 721 and 738 of this book, in the latter instance with the epithet umida applied to Night. What is new and interesting in our passage is the ‘meta caeli’ round which Night′s chariot turns. The effect of this novelty is to make of Night′s vehicle a racing chariot, as it is the chariots in the Circus that must negotiate a meta. The programmatic reasons for Virgil′s having done this in Book 5 are obvious. Earlier in the book Virgil had described the games held in honour of the anniversary of Anchises′ death. The first and most elaborately portrayed event in these games had been the boat-race, which is plainly modelled on the chariot-race in Iliad 23, the first and most elaborately portrayed event in the funeral games for Patroclus. Just as Achilles had required the competing chariots to race once around a distant turning-post, so Aeneas requires the competing ships to race once around a rock out at sea, which rock is three times called a meta . A simile comparing the sailors and their ships to charioteers and their teams makes the connection explicit. (shrink)

In my dissertation, I tried to make sense of the view that the facts that constitute reality—the facts about what there is, and what properties things instantiate—are temporary facts.

À l’instar de nombreux dialogues socratiques de Platon, le Ménexène s’ouvre sur une rencontre fortuite, près de l’agora, entre Socrate et le jeune Ménexène (qui est présent dans le Lysis et aussi dans le Phédon). Ils engagent une discussion à propos de l’éloge des soldats morts au combat traditionnellement prononcé lors de leurs funérailles publiques à Athènes, qui doivent bientôt avoir lieu et pour lesquelles l’orateur doit être choisi par le Conseil. Socrate estime que ce type de discours n...

Objectives: This study was designed to explore the prevalence and types of stipulations required of investigators by the institutional review board of one institution over a five year period.Design: Stipulations to research proposals were documented from the minutes of the IRB meetings.Setting: Community hospital.Participants: IRB submissions.Main measurements: Number and type of IRB stipulations.Results: Nineteen research submissions were approved without any stipulations. For the remainder, the majority of stipulations related to consent forms .Conclusions: Consent forms appear to be at highest risk (...) for IRB stipulations. Being aware of high risk areas before submission of research proposals may reduce the frequency of stipulations required of investigators. (shrink)

From religion to philosophy to science, all human systems of definition are formed by human brains. The nature and limits of the human brain are the nature and limits of those systems. This essay shows how the human brain works normally then unusually, and what this reveals about the limits of human knowledge. There are many conditions and instances where the brain processes information unusually, including mental disorders, physical events, and drug use. This essay focuses on the neurological events called (...) mystical experiences. (shrink)

This short peer-reviewed text is a concise look at the psychology of how human beings make decisions, including how they form their worldviews and make arguments.

This paper aims to provide two abductive considerations adducing in favor of the thesis of Necessitism in modal ontology. I demonstrate how instances of the Barcan formula can be witnessed, when the modal operators are interpreted 'naturally' -- i.e., as including geometric possibilities -- and the quantifiers in the formula range over a domain of natural, or concrete, entities and their contingently non-concrete analogues. I argue that, because there are considerations within physics and metaphysical inquiry which corroborate modal relationalist claims (...) concerning the possible geometric structures of spacetime, and dispositional properties are actual possible entities, the condition of being grounded in the concrete is consistent with the Barcan formula; and thus -- in the geometric setting -- merits adoption by the Necessitist. (shrink)

Part of the appeal of the biological approach to personal identity is that it does not have to countenance spatially coincident entities. But if the termination thesis is correct and the organism ceases to exist at death, then it appears that the corpse is a dead body that earlier was a living body and distinct from but spatially coincident with the organism. If the organism is identified with the body, then the unwelcome spatial coincidence could perhaps be avoided. It is (...) argued that such an identification would be a mistake. A living organism has a different part/whole relationship and persistence conditions than the alleged body. A case will be made that the concept ‘human body’ is a conceptual mess, vague in an unprincipled manner, and that an eliminativist stance towards dead bodies is the appropriate response. CiteULike Connotea Del.icio.us What's this? (shrink)

Oxford Philosophical Texts Series Editor: John Cottingham The Oxford Philosophical Texts series consists of authoritative teaching editions of canonical texts in the history of philosophy from the ancient world down to modern times. Each volume provides a clear, well laid out text together with a comprehensive introduction by a leading specialist, giving the student detailed critical guidance on the intellectual context of the work and the structure and philosophical importance of the main arguments. Endnotes are supplied which provide further commentary (...) on the arguments and explain unfamiliar references and terminology, and a full bibliography and index are also included. The series aims to build up a definitive corpus of key texts in the Western philosophical tradition, which will form a reliable and enduring resource for students and teachers alike. David Hume's aim in writing An Enquiry concerning Human Understanding was to introduce his philosophy to a European culture in which many educated people read original works of philosophy. He gives an elegant and accessible presentation of strikingly original and challenging views about the limited powers of human understanding, the attractions of scepticism, the compatibility of free will and determinism, and weaknesses in the foundations of religion. Hume's philosophy was highly controversial in the eighteenth century and remains so today. The text printed in this edition is that of the Clarendon critical edition of Hume's works. A substantial introduction by the editor explains the intellectual background to the work and surveys its main themes. The volume also includes detailed explanatory notes on the text, a glossary of terms, a full list of references, and a section of supplementary readings. (shrink)

This book is a defense of modal realism; the thesis that our world is but one of a plurality of worlds, and that the individuals that inhabit our world are only a few out of all the inhabitants of all the worlds. Lewis argues that the philosophical utility of modal realism is a good reason for believing that it is true.

As a continuation of the work of the third author in [5], we make further observations on the features of Galois cohomology in the general model theoretic context. We make explicit the connection between forms of definable groups and first cohomology sets with coefficients in a suitable automorphism group. We then use a method of twisting cohomology (inspired by Serre’s algebraic twisting) to describe arbitrary fibres in cohomology sequences—yielding a useful “finiteness” result on cohomology sets. Applied to the special case (...) of differential fields and Kolchin’s constrained cohomology, we complete results from [3] by proving that the first constrained cohomology set of a differential algebraic group over a bounded, differentially large, field is countable. (shrink)

People with dementia have commonly been excluded from research. The adverse impacts of this exclusion are now being recognized and research literature, position statements, and ethics guidelines increasingly call for inclusion of people with dementia in research. However, few published studies investigate the views of potential participants on taking part in research should they experience dementia-related cognitive impairment. This cross-sectional survey examined the views of people aged sixty and older attending hospital outpatient clinics about clinical research participation if they had (...) dementia and impaired decision-making ability. Over 90 percent of respondents were agreeable to participating in a wide range of research activities, such as cognitive testing, physical measurements, imaging procedures, and blood draws. For drug studies, however, agreement dropped to 60 percent. Altruism was a strong motivator for research participation. In regard to who should be involved in decisions about their participation in research during periods of incapacity, respondents mostly preferred the person they appoint as their substitute decision-maker for healthcare matters or a doctor or health professional on the research team. Over three-quarters expressed interest in making an advance research directive. The study findings are discussed in relation to law reforms in Australia that aim to strengthen respect and inclusion for people with impaired decision-making capacity, especially by providing frameworks for advance planning for research participation. (shrink)

In the Garden of Eden, we had unmediated contact with the world. We were directly acquainted with objects in the world and with their properties. Objects were simply presented to us without causal mediation, and properties were revealed to us in their true intrinsic glory.

[This is an edited version of a keynote talk at the conference on Neural Information Processing Systems (NeurIPS) on November 28, 2022, with some minor additions and subtractions.] -/- There has recently been widespread discussion of whether large language models might be sentient or conscious. Should we take this idea seriously? I will break down the strongest reasons for and against. Given mainstream assumptions in the science of consciousness, there are significant obstacles to consciousness in current models: for example, their (...) lack of recurrent processing, a global workspace, and unified agency. At the same time, it is quite possible that these obstacles will be overcome in the next decade or so. I conclude that while it is somewhat unlikely that current large language models are conscious, we should take seriously the possibility that successors to large language models may be conscious in the not-too-distant future. (shrink)

What happens when machines become more intelligent than humans? One view is that this event will be followed by an explosion to ever-greater levels of intelligence, as each generation of machines creates more intelligent machines in turn. This intelligence explosion is now often known as the “singularity”. The basic argument here was set out by the statistician I.J. Good in his 1965 article “Speculations Concerning the First Ultraintelligent Machine”: Let an ultraintelligent machine be defined as a machine that can far (...) surpass all the intellectual activities of any man however clever. Since the design of machines is one of these intellectual activities, an ultraintelligent machine could design even better machines; there would then unquestionably be an “intelligence explosion”, and the intelligence of man would be left far behind. Thus the first ultraintelligent machine is the last invention that man need ever make. The key idea is that a machine that is more intelligent than humans will be better than humans at designing machines. So it will be capable of designing a machine more intelligent than the most intelligent machine that humans can design. So if it is itself designed by humans, it will be capable of designing a machine more intelligent than itself. By similar reasoning, this next machine will also be capable of designing a machine more intelligent than itself. If every machine in turn does what it is capable of, we should expect a sequence of ever more intelligent machines. This intelligence explosion is sometimes combined with another idea, which we might call the “speed explosion”. The argument for a speed explosion starts from the familiar observation that computer processing speed doubles at regular intervals. Suppose that speed doubles every two years and will do so indefinitely. Now suppose that we have human-level artificial intelligence 1 designing new processors. Then faster processing will lead to faster designers and an ever-faster design cycle, leading to a limit point soon afterwards. The argument for a speed explosion was set out by the artificial intelligence researcher Ray Solomonoff in his 1985 article “The Time Scale of Artificial Intelligence”.1 Eliezer Yudkowsky gives a succinct version of the argument in his 1996 article “Staring at the Singularity”: “Computing speed doubles every two subjective years of work.. (shrink)