The Art of Time Travel: A Bigger Picture

This is an open-access article distributed under the terms of the Creative Commons Attribution LicenseWe reply to Storrs McCall's objections to our proposed solution to his puzzle concerning time travel and artistic creativity. We also raise some further thoughts, developing the discussion of time travel's implications for aesthetic value and artistic creativity.Peer reviewedFinal Published versio

Elusive Fictional Truth

© 2022 The Author(s). Published by Oxford University Press on behalf of the British Society of Aesthetics. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY), https://creativecommons.org/licenses/by/4.0/We argue that some fictional truths are fictionally true by default. We also argue that these fictional truths are subject to being undermined. We propose that the context within which we are to evaluate what is fictionally true changes when a possibility which was previously ignorable is brought to attention. We argue that these cases support a model of fictional truth which makes the conversational dynamics of determining truth in fiction structurally akin to the conversational dynamics of knowledge-ascription, as this is understood by David Lewis’s contextualist approach to knowledge. We show how a number of the rules which Lewis proposes for the case of knowledge-ascription can be employed to develop a novel and powerful framework for the case of truth in fiction.Peer reviewe

The Absurdity of Rational Choice: Time Travel, Foreknowledge, and the Aesthetic Dimension of Newcomb Problems

© 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).Nikk Effingham and Huw Price argue that in certain cases of Newcomb problems involving time travel and foreknowledge, being given information about the future makes it rational to choose as an evidential decision theorist would choose. Although the cases they consider have some intuitive pull, and so appear to aid in answering the question of what it is rational to do, we argue that their respective positions are not compelling. Newcomb problems are structured such that whichever way one chooses, one might be led by one’s preferred decision theory to miss out on some riches (riches which others obtain whilst employing their preferred decision theory). According to the novel aesthetic diagnosis we shall offer of the Newcomb dialectic, missing out in this way does not render one irrational but, rather, subject to being seen as absurd. This is a different kind of cost but not one that undermines one’s rationality.Peer reviewe

Explanation and Quasi-Miracles in Narrative Understanding: The Case of Poetic Justice

This is the peer reviewed version of the following article: Craig Bourne, and Emily Caddick Bourne, ‘Explanation and Quasi‐miracles in Narrative Understanding: The Case of Poetic Justice’, Dialectica, Vol. 71 (4): 563-579, January 2018, which has been published in final form at https://doi.org/10.1111/1746-8361.12201. Under embargo until 29 January 2020. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.David Lewis introduced the idea of a quasi-miracle to overcome a problem in his initial account of counterfactuals. Here we put the notion of a quasi-miracle to a different and new use, showing that it offers a novel account of the phenomenon of poetic justice, where characters in a narrative get their due by happy accident (for example, when the murderer of King Mitys happens to be crushed by a falling statue of Mitys). The key to understanding poetic justice is to see what makes poetically just events remarkable coincidences. We argue that remarkable coincidence is to be understood in terms of a distinctive type of experience quasi-miracles offer. Cases of poetic justice offer a dual awareness of the accidental nature of the events and of a non-accidental process, involving intention, which it appears would explain them. We also extend this account to incorporate how we might experience magic tricks. An account of poetic justice as quasi-miraculous allows us to account for the experience of encounters with poetic justice, as involving the incongruity of seeing design in accident.Peer reviewedFinal Accepted Versio

The Basis of Correctness in the Religious Studies Classroom

What is it that makes a student’s answer correct or incorrect in Religious Studies? In practice, the standards of correctness in the RS classroom are generally applied with relative ease by teachers and students. Nevertheless, they are problematic. We shall argue that correctness does not come from either the students or the teacher believing that what has been said is true. This raises the question: what is correctness, if it does not come down to truth? We propose, and examine, three rival solutions, each of which, to an extent, rationalises a fairly natural response to the problem. The first, the elliptical approach, says that correct contributions have some tacit content: they are elliptical for true sentences about beliefs (e.g. a sentence of the form ‘Christians believe that…’). The second, the imaginative approach, seeks to replace appeals to truth and belief with an appeal to imagination, treating RS as a ‘game of make-believe’ in which teachers and students imaginatively engage with certain worldviews. The third, the institutional approach, locates the root of correctness in the practices of the RS institution, which include making endorsements of some judgements and not others. We show that the first of our proposed approaches encounters a number of significant objections. We find the second of our proposed approaches to be better, but the third is the most attractive, providing a direct, intuitive and comprehensive route through the problem of correctness.This is the author accepted manuscript. The final version is available from Wiley via http://dx.doi.org/10.1111/1467-9752.1216

Quantifying capture and ingestion of live feeds across three coral species

Nutrient acquisition through heterotrophy is critical for the health of reef-building corals. The optimization of exogenous nutrition protocols to support a diversity of aquaculture corals requires improved techniques to assess feeding rates. Here, we compared the feeding rates of three coral species (Acropora millepora, Pocillopora acuta and Galaxea fascicularis) fed Artemia salina through capture rate (indirect) and dissection (direct) approaches, with direct detection and enumeration within dissected polyps facilitated by fluorescent microbeads ingested by the Artemia. When A. millepora was provided Artemia at 3 individuals ml−1 for one hour, the calculated capture rates (0.7 ind. polyp−1 h−1) overestimated prey ingested compared to prey detected directly within polyps (0.2 ind. polyp−1 h−1), and ingestion varied significantly between genotypes. In contrast, for P. acuta, capture rate calculations (1 ind. polyp−1 h−1) underestimated prey detected within polyps (3.5 ind. polyp−1 h−1) and ingestion did not vary between genotypes. For G. fascicularis, the feeding rates were similar as calculated by both capture rates (59 ind. polyp−1 h−1) and by polyp dissections (75 ind. polyp−1 h−1). Results from this study provide valuable insights into coral feeding rates of different coral species that can improve prey enrichment and feeding strategies for nutritional supplementation of corals in captivity

Biological controls to manage Acropora-eating flatworms in coral aquaculture

Coral aquaculture is expanding to supply the marine ornamental trade and active coral reef restoration. A common pest of Acropora corals is the Acropora-eating flatworm Prosthiostomum acroporae, which can cause colonial mortality at high infestation densities on Acropora spp. We investigated the potential of 2 biological control organisms in marine aquaria for the control of P. acroporae infestations. A. millepora fragments infested with adult polyclad flatworms (5 flatworms fragment(-1)) or single egg clusters laid on Acropora skeleton were cohabited with either sixline wrasse Pseudocheilinus hexataenia or the peppermint shrimp Lysmata vittata and compared to a control (i.e. no predator) to assess their ability to consume P. acroporae at different life stages over 24 h. P. hexataenia consumed 100% of adult flatworms from A. millepora fragments (n = 9; 5 flatworms fragment(-1)), while L. vittata consumed 82.0 +/- 26.36% of adult flatworms (mean +/- SD; n= 20). Pseudocheilinus hexataenia did not consume any Prosthiostomum acroporae egg capsules, while L. vittata consumed 63.67 +/- 43.48% (n = 20) of egg capsules on the Acropora skeletons. Mean handling losses in controls were 5.83% (shrimp system) and 3.50% (fish system) of flatworms and 2.39% (fish system) and 3.50% (shrimp system) of egg capsules. Encounters between L. vittata and P. hexataenia result in predation of P. acroporae on an Acropora coral host and represent viable biological controls for reducing infestations of P. acroporae in aquaculture systems

Players, Characters, and the Gamer's Dilemma

Is there any difference between playing video games in which the player's character commits murder and video games in which the player's character commits pedophilic acts? Morgan Luck's “Gamer's Dilemma” has established this question as a puzzle concerning notions of permissibility and harm. We propose that a fruitful alternative way to approach the question is through an account of aesthetic engagement. We develop an alternative to the dominant account of the relationship between players and the actions of their characters, and argue that the ethical difference between so-called “virtual murder” and “virtual pedophilia” is to be understood in terms of the fiction-making resources available to players. We propose that the relevant considerations for potential players to navigate concern (1) attempting to make certain characters intelligible, and (2) using aspects of oneself as resources for homomorphic representation.Peer reviewe

The life cycle of the Acropora coral-eating flatworm (AEFW), Prosthiostomum acroporae; the influence of temperature and management guidelines

© The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Barton, J. A., Hutson, K. S., Bourne, D. G., Humphrey, C., Dybala, C., & Rawlinson, K. A. The life cycle of the Acropora coral-eating flatworm (AEFW), Prosthiostomum acroporae; the influence of temperature and management guidelines. Frontiers in Marine Science, 6, (2019): 524, doi: 10.3389/fmars.2019.00524.As coral aquaculture is increasing around the world for reef restoration and trade, mitigating the impact of coral predators, pathogens and parasites is necessary for optimal growth. The Acropora coral-eating flatworm (AEFW), Prosthiostomum acroporae (Platyhelminthes: Polycladida: Prosthiostomidae) feeds on wild and cultivated Acropora species and its inadvertent introduction into reef tanks can lead to the rapid death of coral colonies. To guide the treatment of infested corals we investigated the flatworm’s life cycle parameters at a range of temperatures that represent those found in reef tanks, coral aquaculture facilities and seasonal fluctuations in the wild. We utilized P. acroporae from a long-term in vivo culture on Acropora species to examine the effects of temperature (3°C increments from 21 to 30°C) on flatworm embryonation period, hatching success, hatchling longevity, and time to sexual maturity. Our findings show that warmer seawater shortened generation times; at 27°C it took, on average, 11 days for eggs to hatch, and 35 days for flatworms to reach sexual maturity, giving a minimum generation time of 38 days, whereas at 24°C the generation time was 64 days. Warmer seawater (24–30°C) also increased egg hatching success compared to cooler conditions (21°C). These results indicate that warmer temperatures lead to higher population densities of P. acroporae. Temperature significantly increased the growth rate of P. acroporae, with individuals reaching a larger size at sexual maturity in warmer temperatures, but it did not influence hatchling longevity. Hatchlings, which can swim as well as crawl, can survive between 0.25 and 9 days in the absence of Acropora, and could therefore disperse between coral colonies and inter-connected aquaria. We used our data to predict embryonation duration and time to sexual maturity at 21–30°C, and discuss how to optimize current treatments to disrupt the flatworm’s life cycle in captivity.This study was funded by a James Cook University Development Grant, “Parasite cultivation techniques: in vitro and in vivo culture methods for ecological and applied aquatic parasitology research” awarded to KH. Additional funding to KR and CD was raised through crowdfunding on Experiment.com (https://doi.org/10.18258/1621) and a donation from the Atlanta Reef Club, Duluth, GA, United States