If the octopus were conscious, what would its consciousness be like? This paper investigates the structure octopus consciousness, if existent, is likely to exhibit. Presupposing that the configuration of an organism’s consciousness is correlated with that of its nervous system, it is unlikely that the structure of the sort of conscious experience that would arise from the highly decentralized octopus nervous system would bear much resemblance to those of vertebrates. In particular, octopus consciousness may not exhibit (...) unity, which has long been assumed to be the normal or default structure of consciousness. The octopus nervous system is characterized by the following features: its three anatomically distinct components have extensive functional autonomy and little intercommunication; much of the sensory processing and motor control routines—that in vertebrates are localized in the brain—take place within the peripheral arm nervous system; and proprioception and somatotopic representation are significantly downplayed. In this paper, I present the octopus as a highly successful biological organism in which it is plausible that the unified model of consciousness does not hold. (shrink)

Why do octopuses matter to philosophy? They matter to the part of philosophy concerned with the mind. To see why, we step back and think about the evolutionary connections between all living things. Biologists think of these relationships in terms of a tree of life. This is a huge tree-like pattern, marking which species are close relatives and which are distantly connected. The vertebrates form one branch of the tree, and that is where we find nearly all the animals with (...) large and complex brains. These include ourselves, other mammals, and birds. In evolutionary terms, these are all cousins. In the huge area of the tree containing other animals, invertebrates, there is only one small branch where we also find large brains. This branch contains the cephalopods – octopuses, cuttlefish, and squid. Large nervous systems evolved separately on these two branches, and nowhere else. Octopuses are a separate experiment in the evolution of the mind. Meeting an octopus is like meeting an intelligent alien. So what did this experiment produce? Here is one thing. The nervous system of an octopus is less centralized than ours. In fact, more than half of the octopus' neurons are not in the animal's central "brain" at all, but in the eight arms. It is as if each arm has a mind of its own. Or perhaps in an octopus we see intelligence without a unified self. (shrink)

What is it like to be an octopus, one of those eight-armed, infinitely flexible sea creatures with a nervous system distributed over head, eyes and arms? One interesting approach is to argue that octopuses, because of their distributed nervous systems, are likely to possess disunified consciousness (Carls-Diamante 2017). However, this supposed isomorphism between a “unified” nervous system and “unified” consciousness is problematic, since the term “unity” is taken as a “given” even though it is far from clear what it (...) means. I will argue that explaining the structure of consciousness requires a prior explanation in terms of how it is achieved by the organism through sensorimotor integration. On this account, the structure of an organism’s consciousness is explained partly by what the external world is like, and partly by how the organism’s body, senses and nervous system enable the organism to interact with the external world. (shrink)

In order to argue that cognitive science should be more accepting of explanatory plurality, this paper presents the control of fetching movements in the octopus as an exemplar of a cognitive process that comprises distinct and non-redundant representation-using and non-representational elements. Fetching is a type of movement that representational analyses can normally account for completely—but not in the case of the octopus. Instead, a comprehensive account of octopus fetching requires the non-overlapping use of both representational and non-representational (...) explanatory frameworks. What this need for a pluralistic or hybrid explanation implies is that cognitive science should be more open to using both representational and non-representational accounts of cognition, depending on their respective appropriateness to the type of cognition in question. (shrink)

This is a poem about my experience with one of my most meaningful patients, a woman with Takotsubo (translated from Japanese as "Octopus Trap") Cardiomyopathy. Also known as "broken heart syndrome," Takotsubo is a rare condition that results from periods of extreme physical and/or emotional stress. This is an account of my patient's story as "heard" through the EKG, and how despite arrival at the correct diagnosis through careful history taking and EKG findings, no measure of science or diagnosis (...) could offer the comfort we could provide by simply listening to her story and affirming her in her grief. (shrink)

Octopuses are highly intelligent animals with vertebrate-like cognitive and behavioural repertoires. Despite these similarities, vertebrate-based models of cognition and behaviour cannot always be successfully applied to octopuses, due to the structural and functional characteristics that have evolved in their nervous system in response to the unique challenges posed by octopus morphology. For instance, the octopus brain does not support a _somatotopic_ or point-for-point spatial map of the body—an important feature of vertebrate nervous systems. Thus, while octopuses are capable (...) of motor tasks whose vertebrate counterparts require detailed interoceptive monitoring, these movements may not be explainable using motor control frameworks premised on internal spatial representation. One such motor task is the extension of a single arm. The ability of octopuses to select and use a single arm without the guidance of a somatotopic map has been regarded as a motor control puzzle. In an attempt at a solution, this paper develops a predictive processing account of single-arm extension in octopuses. (shrink)

The organic unity between the head and the vital arms of the octopus is proposed as a metaphor for science and religion as an academic field. While the specific object of the field is to pursue second-order reflections on existing and possible relations between sciences and religions, it is argued that several aspects of realism and normativity are constitutive to the field. The vital arms of the field are related to engagements with distinctive scientific theories, specialized philosophy of science, (...) representative theological proposals, and the input from the study of world religions. (shrink)

The idea that there can be only one cognitive system within any single given cognitive organism is an established albeit implicit one within cognitive science and related studies of the mind. The firm foothold of this notion is due largely to the immense corpus of empirical evidence for the correlation of a high level of cognitive sophistication with a centralized nervous system. However, it must be pointed out that these findings are sourced in large part from studies on vertebrates. This (...) paper presents a potential counterexample to the notion that only one cognitive system can be realized within any single genuine cognitive organism. This counterexample is the octopus, an invertebrate with what initially appears to be a paradoxical combination of vertebrate-like cognitive and behavioral capacities and a functionally decentralized nervous system. The extensive relegation of sensorimotor processing and control responsibilities to the peripheral nervous system which controls the arms of the octopus raises principled reasons to believe that the octopus is an organism that may house multiple independent cognitive systems. (shrink)

This study discusses the mimic octopus’ (Thaumoctopus mimicus) acts of imitation of a banded sea-snake (Laticauda sp.) as an antagonistic response to enemies from a cognitive-semiotic perspective. This mimicry model, which involves very close physical resemblance and highly precise enactment, displays goal-orientedness because the octopus only takes it on when encountering damselfish, a territorial species, and not other sea animals that the octopus has been shown to imitate, such as lionfish and flounders (Norman et al. 2001). Based (...) on theoretical principles and analytic tools from Mitchell’s (1986) typology of deceptive acts, Zlatev’s (2008) Mimesis Hierarchy and Zlatev’s (2018) types and levels of (self-)consciousness, this research raises the possibility that T. mimicus exhibits the following attributes: (i) bodily self-awareness; (ii) cognitive empathy, which builds upon deception and perspective-taking strategies to imagine or project itself into the place of the antagonist; and (iii) capability to reflectively reorganise the standard complete imitation pattern into a partial one in order to optimise its effect, based on conscious visual appraisal of the stimulus position. These capacities would place T. mimicus at the dyadic mimetic level on the Mimesis Hierarchy. For this reason, it is suggested that the name mimic octopus could be replaced by mimetic octopus. (shrink)

Most, if not all, philosophers agree that computers cannot learn what words refers to from raw text alone. While many attacked Searle’s Chinese Room thought experiment, no one seemed to question this most basic assumption. For how can computers learn something that is not in the data? Emily Bender and Alexander Koller ( 2020 ) recently presented a related thought experiment—the so-called Octopus thought experiment, which replaces the rule-based interlocutor of Searle’s thought experiment with a neural language model. The (...) Octopus thought experiment was awarded a best paper prize and was widely debated in the AI community. Again, however, even its fiercest opponents accepted the premise that what a word refers to cannot be induced in the absence of direct supervision. I will argue that what a word refers to _is_ probably learnable from raw text alone. Here’s why: higher-order concept co-occurrence statistics are stable across languages and across modalities, because language use (universally) reflects the world we live in (which is relatively stable). Such statistics are sufficient to establish what words refer to. My conjecture is supported by a literature survey, a thought experiment, and an actual experiment. (shrink)

Jean Painlevé’s films blend aesthetic concerns and scientific realism operating a micro-turn within the broader cinematographic turn that occurred in the sciences in the 20th century. By engaging with his films on the octopus, an animal studied to illuminate human consciousness and firmly grounded in the popular imagina-tion through literature and the arts, this article demonstrates how Painlevé em-braced a politics of life organised around the concept of a missed encounter be-tween life forms.

A visionary journey through contemporary scientific concepts and the mysteries and enigmas that define our universe. Examines animal intelligences within a greater evolutionary context, detailing in particular the remarkable intelligence of crows and octopuses. Looks at the Australian Aborigine Dreamtime as an attempt to understand the combined geological and geomantic landscape. Investigates a range of ideas as they relate to the intersections of consciousness and reality, including reincarnation, past-life memories, ghosts, and UFOs.

We present a mathematical model of two competing marine species that are harvested. We consider three models according to different levels of complexity, without and with species refuge and density-independent and density-dependent species movement between fishing area and refuge. We particularly study the effects of the fishing pressure on the outcome of the competition. We focus on conditions that allow an inferior competitor to invade as a result of fishing pressure. The model is discussed in relationship to the case of (...) the thiof and the octopus along the Atlantic West African coast. At the origin, the thiof was abundant and the octopus scarce in that region. Since, the fishing pressure has strongly increased in some fishing areas leading to the depletion of the thiof and the invasion of its competitor, the octopus. (shrink)

In her essay “The Idea of Perfection,” Iris Murdoch argues that sustained attention directed towards another can result in a person’s moral improvement by getting them to have a more accurate view of the other. In this essay, I argue that the award-winning film My Octopus Teacher illustrates Murdoch’s view and corrects some of its shortcomings. It illustrates Murdoch’s claim by showing how one of the filmmaker’s sustained attention directed at an octopus results not only in an alternation (...) in the filmmaker’s view of the cephalopod but also transforms his life by making him more open to others. Because the central relationship in the film is one between a human being and a cephalopod, the film also corrects the anthropocentric bias in Murdoch’s account by showing that a human being can have a transformative relationship with a creature as alien appearing as an octopus. (shrink)

Philosophy nurtures its actuality from questions, or a call that comes from and leads to a lived risk. This paper embraces that risk in directly responding to nine of the fifteen questions in the Call for Papers for the issue, Philosophy as a Way of Life in a Time of Crisis. Attentive to the idea of PWL, I listened for each question’s latent placement from seasoned historical thinkers. From that, I assigned the order of the questions. Each question served as (...) a bright opening between the latticework of the authors and issues I revisited. I felt transformed and happy under this pergola. Philosophy as a way of life flourishes in such exchanges, and by what ferries from who writes, nurtured in the gardens from whom we write for. Here, too, there are paths to a genre-in-possible-community. May these paths lead us to “everything so that virtue and phronesis are made life-participating.”. (shrink)

Conference Report on ASSC 11, Las Vegas 2007.

The domestic spaces of the built environment are traditionally associated with residential architecture. But the domestic spaces can also extend out, metaphorically, into familiar public spaces in which one may feel at home, and also extend inwards into self-perception, insofar as you may say that you dwell within yourself. This article begins by recalling Vitruvius’ fundamental notion of architectural utilitas concerns accommodating not a building’s owners but foreigners and strange outsiders. Vitruvius’ view on utility heavily favoured architecture’s socio-political function, and (...) the guests he believed that architecture ought to accommodate were not merely a home’s owners or their visiting friends, but those people who are more distant from a home’s owners: those who are stranger and less well understood, known as xenos and who ought to be respected under the Ancient Greek religious and ethical principle of xenia. It is on these grounds that Vitruvius makes an ethical critique of residential architecture in favour of the virtue of public architecture. Next the reach of xenia is proposed to extend towards those who are different not merely because of ethnic differences but cognitive and sensory differences. Such accommodations are today accounted for as part of accessibility design and salutogenic design. Similar conceptions are noted in Nietzsche’s notion of an “architecture for the perceptive” and the surrealist’s interpretation of the minotaur as a hybrid not only of animal and human but a hybrid of civilised citizen and barbarian outsider. Together these sketch out an expanded sense of the domestic that includes public spaces designed to accommodate strange outsiders and the hybrid forms used to signify them. (shrink)

We normally assume that there’s just one conscious individual per animal. Some question this, suggesting that there may be nonhuman taxonomic groups whose normal, adult members house more than one conscious subject. Call this the multitudes view (“MV)”. Our aim is methodological: we hope to understand how we might assess whether MV is true. To that end, we distinguish two strategies for counting conscious subjects: the duplication strategy and the mind-first strategy. We use human split-brain patients and octopuses to illustrate (...) the prospects and limitations of each approach, as some have argued that both sets of individuals contain multitudes. We’ll contend that while the duplication strategy is applicable to split-brain patients, it isn’t apt for octopuses. The mind-first strategy fairs better here, but there’s a catch: it requires, in a way the duplication strategy does not, numerous contentious assumptions about the nature of mentality, the individuation of minds, and consciousness to simply get off the ground. These difficulties clarify just what it would take to establish MV. (shrink)

Can octopuses feel pain and pleasure? What about crabs, shrimps, insects, or spiders? How do we tell whether a person unresponsive after severe brain injury might be suffering? When does a fetus in the womb start to have conscious experiences? Could there even be rudimentary feelings in miniature models of the human brain, grown from human stem cells? And what about AI? These are questions about the edge of sentience, and they are subject to enormous, disorienting uncertainty. The stakes are (...) immense, and neglecting the risks can have terrible costs. We need to err on the side of caution, yet it’s often far from clear what ‘erring on the side of caution’ should mean in practice. When are we going too far? When are we not doing enough? The Edge of Sentience presents a comprehensive precautionary framework designed to help us reach ethically sound, evidence-based decisions despite our uncertainty. (shrink)

How consciousness appeared much earlier in evolutionary history than is commonly assumed, and why all vertebrates and perhaps even some invertebrates are conscious. How is consciousness created? When did it first appear on Earth, and how did it evolve? What constitutes consciousness, and which animals can be said to be sentient? In this book, Todd Feinberg and Jon Mallatt draw on recent scientific findings to answer these questions—and to tackle the most fundamental question about the nature of consciousness: how does (...) the material brain create subjective experience? After assembling a list of the biological and neurobiological features that seem responsible for consciousness, and considering the fossil record of evolution, Feinberg and Mallatt argue that consciousness appeared much earlier in evolutionary history than is commonly assumed. About 520 to 560 million years ago, they explain, the great “Cambrian explosion” of animal diversity produced the first complex brains, which were accompanied by the first appearance of consciousness; simple reflexive behaviors evolved into a unified inner world of subjective experiences. From this they deduce that all vertebrates are and have always been conscious—not just humans and other mammals, but also every fish, reptile, amphibian, and bird. Considering invertebrates, they find that arthropods (including insects and probably crustaceans) and cephalopods (including the octopus) meet many of the criteria for consciousness. The obvious and conventional wisdom–shattering implication is that consciousness evolved simultaneously but independently in the first vertebrates and possibly arthropods more than half a billion years ago. Combining evolutionary, neurobiological, and philosophical approaches allows Feinberg and Mallatt to offer an original solution to the “hard problem” of consciousness. (shrink)

Behavioural evidence suggests that cephalopod molluscs may have a form of primary consciousness. First, the linkage of brain to behaviour seen in lateralization, sleep and through a developmental context is similar to that of mammals and birds. Second, cephalopods, especially octopuses, are heavily dependent on learning in response to both visual and tactile cues, and may have domain generality and form simple concepts. Third, these animals are aware of their position, both within themselves and in larger space, including having a (...) working memory of foraging areas in the recent past. Thus if using a ‘global workspace’ which evaluates memory input and focuses attention is the criterion, cephalopods appear to have primary consciousness. (shrink)

Consciousness has an important role in ethics: when a being consciously experiences the frustration or satisfaction of its interests, those interests deserve higher moral priority than those of a behaviourally similar but non-conscious being. I consider the relationship between this ethical role and an a posteriori (or “type-B”) materialist solution to the mind-body problem. It is hard to avoid the conclusion that, if type-B materialism is correct, then the reference of the concept of phenomenal consciousness is radically indeterminate between a (...) neuronal-level property that is distinctive to mammals and a high-level functional property that is much more widely shared. This would leave many non-mammalian animals (such as birds, fish, insects and octopuses) with indeterminate moral status. There are ways to manage this radical moral indeterminacy, but all of these ways lead to profoundly troubling consequences. (shrink)

Curiosity is evident in humans of all sorts from early infancy, and it has also been said to appear in a wide range of other animals, including monkeys, birds, rats, and octopuses. The classical definition of curiosity as an intrinsic desire for knowledge may seem inapplicable to animal curiosity: one might wonder how and indeed whether a rat could have such a fancy desire. Even if rats must learn many things to survive, one might expect their learning must be driven (...) by simpler incentives, such as hunger. One might also wonder what proximal signals could guide animals towards knowledge itself, or how something as abstract as knowledge could ever be a motivational target for an unreflective animal. Taking a cue from recent work in reinforcement learning, I argue that surprise functions as a reward signal for the curious animal, and then show how this amounts to a desire for knowledge gain, where knowledge is conceived of as a cognitive adaptation to reality. This adaptation results in a mental state whose existence depends essentially on the truth of its contents, a factive mental state. Curious creatures benefit from an interaction between the prediction-error correction processes of basic learning and the active surprise-seeking force of their curiosity. This internally adversarial interaction accelerates knowledge gain in ways that are very helpful for agents with the restrictions of biological creatures, in environments with the complexity of our natural world. (shrink)

Louis Agassiz.--Address at the Emerson Centenary in Concord.--Robert Gould Shaw.--Francis Boott.--Thomas Davidson: a knight-errant of the intellectual life.--Herbert Spencer's autobiography.--Frederick Myers' services to psychology.--Final impressions of a psychical researcher.--On some mental effects of the earthquake.--The energies of men.--The moral equivalent of war.--Remarks at the peace banquet.--The social value of the college-bred.--The university and the individual: The Ph.D. octopus. The true Harvard. Stanford's ideal destiny.--A pluralistic mystic.

This book attempts to advance Donald Griffin's vision of the "final, crowning chapter of the Darwinian revolution" by developing a philosophy for the science of animal consciousness. It advocates a Darwinian bottom-up approach that treats consciousness as a complex, evolved, and multidimensional phenomenon in nature rather than a mysterious all-or-nothing property immune to the tools of science and restricted to a single species. -/- The so-called emergence of a science of consciousness in the 1990s has at best been a science (...) of human consciousness. This book aims to advance a true Darwinian science of consciousness in which its evolutionary origin, function, and phylogenetic diversity are moved from the field’s periphery to its very centre, thus enabling us to integrate consciousness into an evolutionary view of life. Accordingly, this book has two objectives: (i) to argue for the need and possibility of an evolutionary bottom-up approach that addresses the problem of consciousness in terms of the evolutionary origins of a new ecological lifestyle that made consciousness worth having and (ii) to articulate a thesis and beginnings of a theory of the place of consciousness as a complex evolved phenomenon in nature that can help us to answer the question of what it is like to be a bat, an octopus, or a crow. -/- A Philosophy for the Science of Animal Consciousness will appeal to researchers and advanced students interested in advancing our understanding of animal minds as well as anyone with a keen interest in how we can develop a science of animal consciousness. (shrink)

In this essay, I discuss Dennett’s From Bacteria to Bach and Back: The Evolution of Minds and Godfrey Smith’s Other Minds: The Octopus and The Evolution of Intelligent Life from a methodological perspective. I show that these both instantiate what I call ‘synthetic philosophy.’ They are both Darwinian philosophers of science who draw on each other’s work. In what follows I first elaborate on synthetic philosophy in light of From Bacteria and Other Minds; I also explain my reasons for (...) introducing the term; and I close by looking at the function of Darwinism in contemporary synthetic philosophy. (shrink)

Consider what the brain-state theorist has to do to make good his claims. He has to specify a physical–chemical state such that any organism (not just a mammal) is in pain if and only if (a) it possesses a brain of suitable physical–chemical structure; and (b) its brain is in that physical–chemical state. This means that the physical–chemical state in question must be a possible state of a mammalian brain, a reptilian brain, a mollusc’s brain (octopuses are mollusca, and certainly (...) feel pain), etc. At the same time, it must not be a possible (physically possible) state of the brain of any physically possible creature that cannot feel pain. Even if such a state can be found, it must be nomologically certain that it will also be a state of the brain of any extraterrestrial life that may be found that will be capable of feeling pain before we can even entertain the supposition that it may be pain. It is not altogether impossible that such a state will be found... . But this is certainly an ambitious hypothesis. (Putnam 1967/1975, p. 436) The belief that mental states are multiply realized is now nearly universal among philosophers, as is the belief that this fact decisively refutes the identity theory. I argue that the empirical support for multiple realization does not justify the confidence that has been placed in it. In order for multiple realization of mental states to be an objection to the identity theory, the neurological differences among pains, for example, must be such as to guarantee that they are of distinct neurological kinds. But the phenomena traditionally cited do not provide evidence of that sort of variation. In particular, examples of neural plasticity do not provide such evidence. (shrink)

Kammerer and Frankish (this issue) suggest we evaluate introspection of mental states to examine consciousness, but in cephalopods we can only judge internal actions by behaviour output. We can look for mental states — perceptions, beliefs, and intentions — where the tight input–action linkage that is true for reflexes, instincts, and well-learned actions is discontinuous. Here the animal is internally evaluating the sensory input from previous information and making a decision before acting. Perceptions: the octopus motion parallax head bob (...) and wound tending. Beliefs: the cuttlefish delay of gratification. Intentions: use of previous information for future strategies in octopus win-switch foraging and carrying a coconut for future shelter. Intentions are also used in skin displays, their widespread directional lateralization, the octopus 'passing cloud' to startle an immobile prey, the cuttlefish eyespot dot production to repel only visual predators, and the cuttlefish males' deceptive use of the female skin display. These examples allow us to assume in what situations introspection might be used but tell us little about the process of these actions. However, the quantitative variation, laterality, and combination of different displays suggest that cephalopod sexual skin displays are a special case of linkage of internal evaluation to external output that needs further behavioural and neurophysiological assessment. (shrink)

The elephant in the room -- Crabs and octopuses -- The central intelligence of a frog -- The cerebral cortex and consciousness -- Social consciousness -- Yoda and Darth: how can we find -- Consciousness in the brain? -- The hard problem and other perspectives on consciousness -- Conscious machines -- Uploading minds -- How to build visual consciousness.

A Philosophy for the Science of Animal Consciousness aims to advance Donald Griffin’s vision of the “final, crowning chapter of the Darwinian revolution” by firmly integrating animals within the science of consciousness. Although this field has largely neglected the questions of when and why consciousness evolved, this book champions a Darwinian philosophy where the experiences of other animals are put centre-stage in investigations of consciousness. This synopsis offers a summary of the book’s core arguments for the advancement of a truly (...) biological science of consciousness. This approach allows for an empirically rigorous investigation into what it is like to be a bat, a crow, a bee, or an octopus. (shrink)

Astrobiology aims to determine the distribution and diversity of life in the universe. But as the word “biosignature” suggests, what will be detected is not life itself, but an observation implicating living systems. Our limited access to other worlds suggests this observation is more likely to reflect out‐of‐equilibrium gasses than a writhing octopus. Yet, anything short of a writhing octopus will raise skepticism about what has been detected. Resolving that skepticism requires a theory to delineate processes due to (...) life and those due to abiotic mechanisms. This poses an existential question for life detection: How do astrobiologists plan to detect life on exoplanets via features shared between non‐living and living systems? We argue that you cannot without an underlying theory of life. We illustrate this by analyzing the hypothetical detection of an “Earth 2.0” exoplanet. Without a theory of life, we argue the community should focus on identifying unambiguous features of life via four areas: examining life on Earth, building life in the lab, probing the solar system, and searching for technosignatures. Ultimately, we ask, what exactly do astrobiologists hope to learn by searching for life? (shrink)

Image schemas are mental constructs central to human cognitive psychology. The neurobiological grounding of these structures has been suggested by experimental research both in non-human primates (Rizzolatti and Craighero 2004; Umiltá et al. 2001) and lower animals (Knudsen 2002, 1998). However, their applicability as concrete cognitive products has not been explored yet in zoosemiotics. This study shows that image schemas are highly instrumental to making sense of the impersonations of two animals featured in biology research studies and wildlife documentary films: (...) the mimic octopus (Thaumoctopus mimicus) and the Gibb’s sea spider crab (Pisa armata). In analysing the movements and postures of these animals, it is argued that image schemas underlie recurring patterns of animal bodily experience and response, which ties image-schematic structures to non-human intersubjectivity. In line with the pluralistic view of zoosemiotics (e.g. Maran, Martinelli and Turovski 2011), this paper takes an intermediary position in the continuity–discontinuity debate regarding communication in humans and animals. In this regard, the complexity of the creative behavioural models of the animals examined leaves the door open for the existence of sophisticated mental life in non-human species. (shrink)