Ethics and Political Philosophy Commons^™

Sentience In Decapods: Difficulties To Surmount, Michael L. Woodruff

Animal Sentience

In the target article Crump et al. present 8 criteria to assess whether decapods experience pain. Four of these -- sensory integration, motivational trade-offs, flexible self-protection, and associative learning -- could be used to assess sentience in general. In this commentary I discuss difficulties with using these criteria to provide evidence of sentience in decapods, particularly if this evidence is to change public opinion and policies. These difficulties are lack of evidence, the potential to eventually explain the neurobiological basis of the behaviors chosen as criteria, thereby eliminating any explanatory work for sentience, and the reluctance to bring animals that …

A Framework For Evaluating Evidence Of Pain In Animals, Matilda Gibbons, Lars Chittka

Animal Sentience

Crump et al. define eight criteria indicating sentience in animals, with a focus on pain. Here, we point out the risk of false negative or false positive diagnoses of pain. Criteria of different levels of inclusivity are useful for using the precautionary principle in animal welfare considerations, and for more formal scientific evidence of pain. We suggest tightening the criteria -- from more general evidence of sentience to pain alone -- because crucial evidence for animal welfare decisions might otherwise be missed for animals subjected to invasive and injurious procedures.

The Reality And Prevalence Of Animal Sentience, Antonio Damasio

Animal Sentience

Rowan et al use findings from neurobiology, clinical neurology, and general biology to argue for the extensive presence of sentience in animals, but they are wisely cautious concerning when in the phylogenetic scale that emergence occurred.

Defending Human Difference By Raising The Bar, Joe Gough

Animal Sentience

Chapman & Huffman (C&H) offer a theory of why we humans want to believe that we are different: to justify our cruelty to animals. This commentary offers further supporting evidence of this and examines more closely what the claim that humans are ‘different’ amounts to. It also considers some methodological issues in animal psychology closely related to C&H ‘s theory. These problems result from a common strategy for defending hypotheses about human difference.

Introduction To Philosophy, Ryan Mcelhaney

Open Educational Resources

No abstract provided.

Do Beetles Have Experiences? How Can We Tell?, Matt Cartmill

Animal Sentience

We attribute consciousness to other humans because their anatomy and behavior resembles our own and their verbal descriptions of subjective experiences correspond to ours. Nonhuman mammals have somewhat humanlike behavior and anatomy, but without the verbal descriptions. Their sentience is therefore open to Cartesian doubt. Robot "minds" lack humanlike behavior and anatomy, and so their sentience is generally discounted no matter what sentences they generate. Invertebrates lack both neurological similarity and language. Although it may be safest in making moral judgments to assume that some invertebrates are sentient, cogent reasons for thinking so must await an objective causal explanation for …

Moral Treatment For All, Eric Dietrich, Tara Fox Hall

Animal Sentience

There is no way to include invertebrates within the moral sphere without being “extreme” — to use Mikhalevich & Powell’s term. This is because of the profound difficulties in correctly attributing sentience. This commentary argues that we have a moral duty to be extreme.

Inhibition Of Pain Or Response To Injury In Invertebrates And Vertebrates, Matilda Gibbons, Sajedeh Sarlak

Animal Sentience

In certain situations, insects appear to lack a response to noxious stimuli that would cause pain in humans. For example, from the fact that male mantids continue to mate while being eaten by their partner it does not follow that insects do not feel pain; it could be the result of modulation of nociceptive inputs or behavioural outputs. When we try to infer the underlying mental state of an insect from its behaviour, it is important to consider the behavioural effects of the associated physiological and neurobiological mechanisms.

Sentience In All Organisms With Centralized Nervous Systems, Lori Marino

Animal Sentience

Mikhalevich & Powell (2020) argue for considering the welfare of invertebrates, especially insects, by asking whether invertebrates have the cognitive and neural characteristics necessary for sentience. This approach assumes that human neural and cognitive complexity is the basis of sentience. But insight might also be gained by turning this approach on its head and examining the notion that sentience may be a fundamental biological property, appearing very early in the evolution of life in all organisms with centralized nervous systems.

Intuition And The Invertebrate Dogma, Jonathan Balcombe

Animal Sentience

Just as intuition, fueled by hubris, led us to exclude insects from moral consideration, so intuition can lead to the opposite conclusion. Observed insect behavior, combined with scientific support for insect consciousness summarized in Mikhalevich & Powell’s target article, and bolstered by the Precautionary Principle, all militate against completely denying moral status to insects.

Reconsidering Moral Perception: The Dialectical Emergence Of Moral Perceptual Contents During Experience Via Cognitive Penetration And Oppressive Socialization’S Suppression Of Our Ability To ‘See’ Moral Reasons For Humanization And Liberation, James William Lincoln

Theses and Dissertations--Philosophy

Moral perceptions occur when a subject makes an immediate discernment about the moral features of an occurrent experience. This project taxonomizes theories of moral perception into the following two camps: experientialism and judgementalism. I defend a version of experientialism, Moral Perceptual Orientation, by arguing that we, in addition to making moral judgments, have genuine perceptions with moral content during occurrent experience. I then go on to advance a framework for understanding how these perceptions are curated by our background beliefs by developing a view of dialectical consciousness. I do this by synthesizing Herbert Marcuse’s perspective on the epistemic subject with …

The Reliable Revisionist, Caitlyn Schaffer

Philosophy: Student Scholarship & Creative Works

The present text explores how the topic of head and heart is much more complicated than one would expect, according to Paul Henne and Walter Sinnot-Armstrong, contributors of Neuroexistentialism. “Does Neuroscience Undermine Morality” aims at figuring out the problem of which moral judgments we can trust, judgments from one’s head (revisionism) or judgments from one’s heart (conservatism). My hypothesis suggests the opposite of the authors, I believe that if you are a revisionist, your first order intuitions are reliable. After setting the framework, I make three main arguments. (A.) If you are able to self-correct then you can identify errors …

Queerness, Witchcraft, And Embodied Presence: Aesthetic Knowings Of What A Body Can Do, Megan Bigelow

Dissertations, Theses, and Capstone Projects

Taking as a point of entry the critique of representation and affirming the limitations of the cuts that language makes, this capstone project explores the imbrications and assemblages between Foucault’s concept of subjugated knowledges, witchcraft and other body-based ways of knowing and being, and the consciousness of non-human forms such as plants and through the framework of non-representational theory, process philosophies, aesthetics, queerness, and the concept of difference itself.

Since such theories themselves are living, breathing entities, this capstone project explores the ideological split that has occurred between sacred and secular beliefs, moving through different figures such as nuns and …

The Perfecting Of The Octopus, Ila France Porcher

Animal Sentience

Cephalopods split away from the phylogenetic tree about half a billion years ago, and octopus evolution has been accelerated by an extremely low survival rate. This helps explain why this unusual animal presents qualities found in no other. It has a radially organized nervous system with a processing centre for each of its eight tentacles. Yet, although this might suggest that each tentacle has its own centre of consciousness, it remains just one animal, with one mouth to feed, and one life to lose, and it behaves as if it is centrally controlled. Its capacity for a range of intelligent …

Cephalopods Are Best Candidates For Invertebrate Consciousness, Jennifer A. Mather, Claudio Carere

Jennifer Mather, PhD

Insects might have been the first invertebrates to evolve sentience, but cephalopods were the first invertebrates to gain scientific recognition for it.

If It Looks Like A Duck: Fish Fit The Criteria For Pain Perception, Julia E. Meyers-Manor

Animal Sentience

Whereas we have denied the experience of pain to animals, including human babies, the evidence is becoming clearer that animals across a variety of species have the capacity to feel pain (Bellieni, 2012). As converging findings are collected from pain studies and the study of cognition, it is becoming harder to deny that fish are among the species that do feel pain.

Pain In Fish: Evidence From Peripheral Nociceptors To Pallial Processing, Michael L. Woodruff

Animal Sentience

The target article by Sneddon et al. (2018) presents convincing behavioral and pharmacological evidence that ray-finned fish consciously perceive noxious stimuli as painful. One objection to this interpretation of the evidence is that the fish nervous system is not complex enough to support the conscious experience of pain. Data that contradict this objection are presented in this commentary. The neuroanatomy and neurophysiology of the fish nervous system from the peripheral nerves to the pallium is able to support the sentient appreciation of pain.

Thinking Like A Fox: Individual Choice And The Unique Role Of Liberal Arts Colleges In Empowering America's Future Leaders, Christopher Tan

Richard T. Schellhase Essay Prize in Ethics

The dilemma faced by Dean Kelly Smith on whether to allow Chris Williams to graduate from her college challenges the current model of higher education in the United States from an economic and normative perspective. When considering the situation that Dean Smith faces, this paper aims to demonstrate how Chris Williams should not be allowed to graduate without first passing the Senior Seminar after: (1) exploring the role of liberal arts colleges in encouraging agency among their students; (2) assessing the qualitative value of a college education in diversifying students’ knowledge base and providing students with the resources and opportunities …

Fish Sentience, Consciousness, And Ai, Ila France Porcher

Animal Sentience

The systematic criticism of articles providing evidence that fish and invertebrates can feel pain is discussed. Beliefs are known to be stronger than evidence in the human mind, and could generate this outcry, while from another perspective, the criticisms appear as a territorial move by fishermen against a perceived threat to their domain. The scientific inconsistency in which consciousness is granted to machines but not to fish and invertebrates, purely due to political bias, is pointed out. No basis exists for denying sentience to any life form as long as science is ignorant of the nature and source of consciousness.

The Evil Of Banality: On The Life And Death Importance Of Thinking By Elizabeth Minnich, Kathleen Barry

Dignity: A Journal of Analysis of Exploitation and Violence

No abstract provided.

Studying Dog Emotion Beyond Expression And Without Concern For Feeling, Peter F. Cook

Animal Sentience

Studies of dog emotion have focused on the expression of social emotion, either because this is taken to suggest human-like feeling states in dogs or because it has been the most accessible signal of dog emotional processing. I argue for an approach grounded in affective neuroscience, relying on direct measures of physiology across different contexts. This work may be particularly fertile in exploring social emotion in the dog, not because dogs necessarily share human emotional states, but because they are unique in having likely evolved to fit a human social niche.

Animal Models, Agendas And Sentience, Thomas Creson

Animal Sentience

Woodruff’s target article on teleost consciousness is a well-organized logical argument for considering the fish as a sentient being. This becomes more important for animal ethical discussion as the fish becomes a more important and legitimate animal model for investigating animal states and traits associated with higher levels of behavior such as learning and memory.

Still Wondering How Flesh Can Feel, Gwen J. Broude

Animal Sentience

Reber believes he has simplified Chalmers’s “hard problem” of consciousness by arguing that subjectivity is an inherent feature of biological forms. His argument rests on the related notions of continuity of mind and gradual accretion of capacities across evolutionary time. These notions need to be defended, not just asserted. Because Reber minimizes the differences in mental faculties among species across evolutionary time, it becomes easier to assert, and perhaps believe, that sentience is already present in early biological forms. The more explicit we are about the differences among these mental faculties and the differences across species, the less persuasive is …

Reber’S Caterpillar Offers No Help, Carl Safina

Animal Sentience

Reber’s target article “Caterpillars, consciousness and the origins of mind” seems only to shift but not to address the question of where the mind is and how minds occur.

Resolving The Hard Problem And Calling For A Small Miracle, Arthur S. Reber

Animal Sentience

With the exception of the commentary by Key, the commentaries on Reber have a common feature: the commenters feel, with varying levels of enthusiasm, that there is at least some virtue in the core assumption of the Cellular Basis of Consciousness (CBC) theory that consciousness (or subjectivity or sentience) accompanies the earliest forms of life. The model has two important entailments: (a) it resolves the (in)famous Hard Problem by redirecting the search for the biochemical foundations of sentience away from human consciousness; and (b) it reduces the need for an emergentist miracle to a far simpler scale than is currently …

Unconscious Higher-Order Thoughts (Hots) As Pre-Reflective Self-Awareness?, Rocco J. Gennaro

Animal Sentience

Rowlands argues that many nonhuman animals are “persons,” contrary to the prevailing orthodoxy which rests on a mistaken conception of the kind of self-awareness relevant to personhood. He argues that self-awareness bifurcates into two importantly different forms — reflective self-awareness and pre-reflective self-awareness — and that many animals can have the latter, which is sufficient for personhood. I agree that there is good reason to think that many animals can have pre-reflective self-awareness, but I think Rowlands is mistaken about its nature. His account runs the risk of leading to an infinite regress objection, and his notion of pre-reflective self-awareness …

Insects: Still Looking Like Zombies, Christopher S. Hill

Animal Sentience

In arguing that insect brains are capable of sentience, Klein & Barron rely heavily on Bjorn Merker’s claim that activity in the human mid-brain is sufficient for conscious experience. I criticize Merker’s claim by pointing out that the behaviors supported by midbrain activity are much more primitive than the ones that appear to depend on consciousness. I raise a similar objection to Klein & Barron’s contention that insect behaviors are similar to behaviors that manifest consciousness in human beings. The similarity is weak. I also respond to the related view that integrative activity in mid-brain structures is sufficient to explain …

Beginnings: Physics, Sentience And Luca, Carolyn A. Ristau

Animal Sentience

According to Reber’s model, Cellular Basis of Consciousness (CBC), sentience had its origins in a unicellular organism and is an inherent property of living, mobile organic forms. He argues by analogy to basic physical forces which he considers to be inherent properties of matter; I suggest that they are instead the stuff of scientific investigation in physics. I find no convincing argument that sentience had to begin in endogenously mobile cells, a criterial attribute of the originator cell(s)for sentience according to CBC. Non-endogenously mobile cells, (i.e., plants or precursors) in a moving environment would suffice. Despite my concerns and the …

Subjective Experience In Insects: Definitions And Other Difficulties, Shelley Adamo

Animal Sentience

Whether insects have the potential for subjective experiences depends on the definition of subjective experience. The definition used by Klein & Barron (2016) is an unusually liberal one and could be used to argue that some modern robots have subjective experiences. From an evolutionary perspective, the additional neurons needed to produce subjective experiences will be proportionately more expensive for insects than for mammals because of the small size of the insect brain. This greater cost could weaken selection for such traits. Minimally, it may be premature to assume that small neuronal number is unimportant in determining the capacity for consciousness.

Bacteria And The Cellular Basis Of Consciousness, Michael L. Woodruff

Animal Sentience

According to Reber’s theory, the Cellular Basis of Consciousness (CBC), sentience originates as bio-sensitivity in unicellular organisms. For this reason, Reber regards sentience as evolutionarily foundational. Many bacteria show chemotaxis and, thus, according to CBC, they are sentient. Analysis of the genetic mechanisms underlying bacterial chemotaxis indicates that sentience has no explanatory power in this case. Genetic analysis also fails to show species continuity underlying bio-sensitivity in bacteria and bio-sensitivity in species with nervous systems, so it does not seem that sentience is evolutionary foundational. CBC is rejected on these grounds.