In the paper [2] the following theorem is shown: Theorem (Th. 3,5, [2]), If =0 or = or , then a closure space X is an absolute extensor for the category of , -closure spaces iff a contraction of X is the closure space of all , -filters in an , -semidistributive lattice.In the case when = and =, this theorem becomes Scott's theorem.

Universality of generalized Alexandroff's cube plays essential role in theory of absolute retracts for the category of , -closure spaces. Alexandroff's cube. is an , -closure space generated by the family of all complete filters. in a lattice of all subsets of a set of power .Condition P(, , ) says that is a closure space of all , -filters in the lattice ( ).

The main theorem says that a consequence operator is an effective part of the consequence operator for the classical prepositional calculus iff it is a consequence operator for a logic satisfying the compactness theorem, and in which every finitely axiomatizable theory is decidable.

Contents: PART 1. MODELS IN SCIENTIFIC PROCESSES. Joseph AGASSI: Why there is no theory of models. Ma??l??gorzata CZARNOCKA: Models and symbolic nature of knowledge. Adam GROBLER: The representational and the non-representational in models of scientific theories. Stephan HARTMANN: Models as a tool for the theory construction; some strategies of preliminary physics. William HERFEL: Nonlinear dynamical models as concrete construction. Elzbieta KA??L??USZY??N??SKA: Styles of thinking. Stathis PSILLOS: The cognitive interplay between theories and models: the case of 19th century optics. PART 2. (...) TOOLS OF SCIENCE. Nancy D. CARTWRIGHT, Towfic SHOMAR, Maricio SUAREZ: The tool-box of science. Javier ECHEVERRIA: The four contexts of scientific activity. Katline HAVAS: Continuity and change; kinds of negation in scientific progress. Matthias KAISER: The independence of scientific phenomena. W??l??adys??l??aw KRAJEWSKI: Scientific meta-philosophy. Ilkka NIINILUOTO: The emergence if scientific specialities: six models. Leszek NOWAK: Antirealism, realism and idealization. Rinat M. NUGAYEV: Classic, modern and postmodern scientific unification. Veikko RANTALA: Translation and scientific change. Gerhard SCHURZ: Theories and their applications - a case of nonmonotonic reasoning. Witold STRAWI??N??SKI: The unity of science today. Vardan TOROSIAN: Are the ethic and logic of science compatible. PART 3. UNSHARP APPROACHES IN SCIENCE. Ernest W. ADAMS: Problems and prospects in a theory of inexact first-order theories. Wolfgang BALZER and Gerhard ZOUBEK: On the comparison of approximative empirical claims. Gianpierro CATTANEO, Maria Luisa DALLA CHIARA, Roberto GIUNTINI: The unsharp approaches to quantum theory. Theo A.F. KUIPERS: Falsification versus efficient truth approximation. Bernhard LAUTH: Limiting decidability and probability. Jaros??l??aw PYKACZ: Many-valued logics in foundations of quantum mechanics. Roman R. ZAPATRIN: Logico-algebraic approach to spacetime quantization. (shrink)

The ethical Principle of Proportionality requires combatants not to cause collateral harm excessive in comparison to the anticipated military advantage of an attack. This principle is considered a major (and perhaps insurmountable) obstacle to ethical use of autonomous weapon systems (AWS). This article reviews three possible solutions to the problem of achieving Proportionality compliance in AWS. In doing so, I describe and discuss the three components Proportionality judgments, namely collateral damage estimation, assessment of anticipated military advantage, and judgment of “excessiveness”. (...) Some possible approaches to Proportionality compliance are then presented, such as restricting AWS operations to environments lacking civilian presence, using AWS in targeted strikes in which proportionality judgments are pre-made by human commanders, and a ‘price tag’ approach of pre-assigning acceptable collateral damage values to military hardware in conventional attritional warfare. The article argues that application of these three compliance methods would result in AWS’ achieving acceptable Proportionality compliance levels in many combat environments and scenarios, allowing AWS to perform most key tasks in conventional warfare. (shrink)

The beginning of this century hailed a new paradigm in linguistics, the paradigm brought about by de Saussure's Cours de Linguistique Generale and subsequently elaborated by Jakobson, Hjelmslev and other linguists. It seemed that the linguistics of this century was destined to be structuralistic. However, half of the century later a brand new paradigm was introduced by Chomsky's Syntactic Structures followed by Montague's formalization of semantics. This new turn has brought linguistics surprisingly close to mathematics and logic, and has facilitated (...) a direct practical exploitation of linguistic theory by computer science. (shrink)

New conjunctionlike and disjunctionlike operations on orthomodular lattices are defined with the aid of formal Mackey decompositions of not necessarily compatible elements. Various properties of these operations are studied. It is shown that the new operations coincide with the lattice operations of join and meet on compatible elements of a lattice but they necessarily differ from the latter on all elements that are not compatible. Nevertheless, they define on an underlying set the partial order relation that coincides with the original (...) one. The new operations are in general nonassociative: if they are associative, a lattice is necessarily Boolean. However, they satisfy the Foulis-Holland-type theorem concerning associativity instead of distributivity. (shrink)

This book, written both for a Canadian and an international readership, provides a multidisciplinary review of the framework and performance of the Canadian Medical Assistance in Dying (MAID) program. In the first five years (2015-2021) of operation, this program delivered voluntary euthanasia and assistance in suicide to over 30,000 Canadian residents, presently representing a 30% annual growth. Looking back on these first five years, the 30 Canadian scholars and clinicians contributing to this volume raise important issues and attempt to answer (...) key questions that have arisen in regards to its operation and its stated objectives. This volume strikes the most appropriate balance between the autonomy of persons who seek medical assistance, versus the interests and protection of vulnerable persons. Finally, the book makes suggestions on how the program can presently be improved. It identifies gaps in knowledge about MAID’s operational program and its impact on individuals, families and society in order to stimulate the necessary research that is essential to the evolution of a healthy and well-balanced program. As a first, comprehensive examination of medically assisted deaths in Canada, this publication will be of great value to lay, professional, academic, political audiences both domestically and internationally, especially in jurisdictions that are examining their options of permitting assisted deaths. (shrink)

Contemporary bioethics recognizes the importance of the culture in shaping ethical issues, yet in practice, a process for ethical analysis and decision making is rarely adjusted to the culture and ethnicity of involved parties. This is of a particular concern in a health care system that is caring for a growing Aboriginal population. We raise the possibility of constructing a bioethics grounded in traditional Aboriginal knowledge. As an example of an element of traditional knowledge that contains strong ethical guidance, we (...) present the story of the Gifts of the Seven Grandfathers. We note a resemblance of this Ojibway teaching to virtue ethics in European traditions, but we suggest that there are also important differences in how these two traditions are currently presented. We hope that further engagement with a variety of indigenous moral teachings and traditions could improve health care involving Aboriginal patients and communities, and enrich the discipline of bioethics. (shrink)

According to the evaluativist theory of bodily pain, the overall phenomenology of a painful experience is explained by attributing to it two types of representational content—an indicative content that represents bodily damage or disturbance, and an evaluative content that represents that condition as bad for the subject. This paper considers whether evaluativism can offer a suitable explanation of aversive auditory phenomenology—the experience of awful noises—and argues that it can only do so by conceding that auditory evaluative content would be guilty (...) of widespread error. Defending such an error-theory, moreover, comes with several explanatory costs. (shrink)

In the near future, experts predict, an influenza pandemic will likely spread throughout the world. Many countries have been creating a contingency plan in order to mitigate the severe health and social consequences of such an event. Examination of the pandemic plans of Canada, the United Kingdom and the United States, from an ethical perspective, raises several concerns. One: scarcity of human and material resources is assumed to be severe. Plans focus on prioritization but do not identify resources that would (...) be optimally required to reduce deaths and other serious consequences. Hence, these plans do not facilitate a truly informed choice at the political level where decisions have to be made on how much to invest now in order to reduce scarcity when a pandemic occurs. Two: mass vaccination is considered to be the most important instrument for reducing the impact of infection, yet pandemic plans do not provide concrete estimates of the benefits and burdens of vaccination to assure everyone that the balance is highly favorable. Three: pandemic plans make extraordinary demands on health care workers, yet professional organizations and unions may not have been involved in the plans' formulation and they have not been assured that authorities will aim to protect and support health care workers in a way that corresponds to the demands made on them. Four: all sectors of society and all individuals will be affected by a pandemic and everyone's collaboration will be required. Yet, it appears that the various populations have been inadequately informed by occasional media reports. Hence, it is essential that plans are developed and communication programs implemented that will not only inform but also create an atmosphere of mutual trust and solidarity; qualities that at the time of a pandemic will be much needed. (shrink)

The Canadian medical assistance in dying program, based on an ambitious piece of legislation and detailed regulations, has failed to provide Canadians with sufficient publicly accessible evidence to show that it is operating as mandated by the requirements of the law, regulations, and expectations of all stakeholders. The federal law that was adopted in 2016 defined the eligibility criteria and put in place a number of safeguards that had to be satisfied before providing assisted dying to a person in order (...) not to transgress the Criminal Law. The responsibility of monitoring for the purpose of investigating compliance with the eligibility criteria and procedural safeguards was assigned by the Federal Ministry of Health to the provincial and territorial governments. Some of the governments have released statistical data concerning the program, but none have yet issued a comprehensive report on adherence to the eligibility criteria and its safeguards as required by the law and regulations. This paper explains the process, explores the possible reasons for this shortfall, and offers some suggestions for actions that could rectify this aspect of the MAID program. Accountability and transparency are integral to the delivery of MAID and the publications of the mandated federal as well as provincial/territorial monitoring reports are one important approach to achieving confidence and trust in the program. (shrink)

There is a significant omission in the whole endeavor of moral analysis as commonly used in bioethics. Whether the analysis is based on a set of moral principles grounded in common morality, on a deontological or a consequentialist theory, or on other considerations, the focus has been to assist moral agents in making ethically appropriate decisions. Little or no attention has been paid to the issue of who the appropriate moral agent or decision maker is in any given situation. Yet, (...) how to make a decision and who should make that decision are equally important, albeit separate, issues. The principle of respect for autonomy, which favors self-determination of the patient or the surrogate, generally is invoked when .. (shrink)

The relationship of humans to other primates – both in terms of abilities and evolution - has been an age-old topic of dispute in science. In this paper the claim is made that the different views of authors are based not so much on differences in empirical evidence, but on the ontological stances of the authors and the underlying ground narratives that they use. For comparing and reconciling the views presented by the representatives of, inter alia, cognitive ethology, comparative psychology, (...) and zoosemiotics, an overarching approach of multi-constructivism is introduced. The paper proposes an analytic model that distinguishes four logical possibilities in representing anthropological difference: Gradualism, Transformativism, Unitarism, and Pluralism. Using this typology, the views of C. Darwin, F. de Waal, M. Tomasello, and T. A. Sebeok regarding the similarities and differences between human and animal capacities for cognition, culture and communication are analyzed. The results indicate systematic differences in the selected narratives by these authors that can be related to the types of underlying ontologies. (shrink)

It, is shown that Birkhoff –von Neumann quantum logic (i.e., an orthomodular lattice or poset) possessing an ordering set of probability measures S can be isomorphically represented as a family of fuzzy subsets of S or, equivalently, as a family of propositional functions with arguments ranging over S and belonging to the domain of infinite-valued Łukasiewicz logic. This representation endows BvN quantum logic with a new pair of partially defined binary operations, different from the order-theoretic ones: Łukasiewicz intersection and union (...) of fuzzy sets in the first case and Łukasiewicz conjunction and disjunction in the second. Relations between old and new operations are studied and it is shown that although they coincide whenever new operations are defined, they are not identical in general. The hypothesis that quantum-logical conjunction and disjunction should be represented by Łukasiewicz operations, not by order-theoretic join and meet is formulated and some of its possible consequences are considered. (shrink)

Annual Reports on Medical Assistance in Dying (MAID) issued by Health CanadaCanada on behalf of the Government of Canada strive to make essential information public, on this large national program that over five years has provided death to over 30,000 Canadians. The source of the information is self-reporting by physicians and nurse practitioners who offer to act as MAID assessors and providers, as well as self-reporting by cooperating pharmacists. Focus of this discussion is the latest available document in this series, (...) the Third Annual Report on MAID published in July 2022 and providing data on 10,064 deaths by MAID in 2021. In addition to reviewing essential information about MAID recipients and MAID providers, the discussion is centered on the method of data collection, the rapid and unexpected annual increase of cases, the underlying medical conditions, the nature of suffering reported by MAID applicants, the use of palliative care, the decision-making about one’s eligibility, the role of the reflection period, necessary requirement to obtain informed consent and the denial of assisted dying. In each case, the attention is drawn to missing or indeterminate elements, and essential but unavailable analysis of data, in order to identify further information that ought to be collected and used to generate future annual reports and to refine the delivery of MAID program and its oversight. (shrink)

This edited volume is the first specialized book in English about the Swiss zoologist and anthropologist Adolf Portmann. It provides a clarification and update of Portmann’s theoretical approach to the phenomenon of life, characterized by terms such as “inwardness” and “self-presentation.” Portmann’s concepts of secondary altriciality and the social uterus have become foundational in philosophical anthropology, providing a benchmark of the difference between humans and animals. In its content, this book brings together two approaches: historical and philosophical analysis of Portmann’s (...) studies in the life sciences and application of Portmann’s thought in the fields of biology, anthropology, and biosemiotics. Significant attention is also paid to the methodological implications of his intended reform of biology. Besides contributions from contemporary biologists, philosophers, and historians of science, this volume also includes a translation of an original essay by Portmann and a previously unpublished manuscript from his most remarkable English-speaking interpreter, philosopher Marjorie Grene. Portmann’s conception of life is unique in its focus on the phenomenal appearance of organisms. Confronted with the enormous amount of scientific knowledge being produced today, it is even clearer than it was during Portmann’s lifetime that although biologists employ physical and chemical methods, biology itself is not physics and chemistry. These exact methods must be applied according to what has meaning for living beings. If biology seeks to understand organisms as autonomous agents, it needs to take display and the interpretation of appearances as basic characteristics of life. The topic of this book is significantly relevant to the disciplines of theoretical biology, philosophy, philosophical anthropology, and biosemiotics. The recent epigenetic turn in biology, acknowledging the interconnections between organismal development, morphology and communication, presents an opportunity to revisit Portmann’s work and to reconsider and update his primary ideas in the contemporary context. (shrink)

The relationship of humans to other primates – both in terms of abilities and evolution - has been an age-old topic of dispute in science. In this paper the claim is made that the different views of authors are based not so much on differences in empirical evidence, but on the ontological stances of the authors and the underlying ground narratives that they use. For comparing and reconciling the views presented by the representatives of, inter alia, cognitive ethology, comparative psychology, (...) and zoosemiotics, an overarching approach of multi-constructivism is introduced. The paper proposes an analytic model that distinguishes four logical possibilities in representing anthropological difference: Gradualism, Transformativism, Unitarism, and Pluralism. Using this typology, the views of C. Darwin, F. de Waal, M. Tomasello, and T. A. Sebeok regarding the similarities and differences between human and animal capacities for cognition, culture and communication are analyzed. The results indicate systematic differences in the selected narratives by these authors that can be related to the types of underlying ontologies. (shrink)

In the paper it is shown that every physically sound Birkhoff - von Neumann quantum logic, i.e., an orthomodular partially ordered set with an ordering set of probability measures can be treated as partial infini te-valued Lukasiewicz logic, which unifies two competing approaches: the many-valued, and the two-valued but non-distributive, which have co-existed in the quantum logic theory since its very beginning.

The relationship of humans to other primates – both in terms of abilities and evolution - has been an age-old topic of dispute in science. In this paper the claim is made that the different views of authors are based not so much on differences in empirical evidence, but on the ontological stances of the authors and the underlying ground narratives that they use. For comparing and reconciling the views presented by the representatives of, inter alia, cognitive ethology, comparative psychology, (...) and zoosemiotics, an overarching approach of multi-constructivism is introduced. The paper proposes an analytic model that distinguishes four logical possibilities in representing anthropological difference: Gradualism, Transformativism, Unitarism, and Pluralism. Using this typology, the views of C. Darwin, F. de Waal, M. Tomasello, and T. A. Sebeok regarding the similarities and differences between human and animal capacities for cognition, culture and communication are analyzed. The results indicate systematic differences in the selected narratives by these authors that can be related to the types of underlying ontologies. (shrink)

This paper focuses on the links between Jakob von Uexküll’s theoretical biology and Adolf Portmann’s conception of organic life. Its main purpose is to show that Uexküll and Portmann not only share a view of the living being as an autonomous and holistically organized entity, but also base this view on the seminal idea of the subjectivity of the organism. In other words, the respective holistic principles securing the autonomy of the living being—the Bauplan, for Uexküll; the Innerlichkeit, for Portmann—share (...) an essentially subjective character. Such principles, indeed, express themselves in a centrally directed and formative way; moreover, in organisms endowed with a central nervous system, they also extend their influence on the overt behavioral sphere and on the organism’s capacity to give meaning to the surrounding reality. The conclusion of the article will show how, though starting from this common background, the two authors develop divergent positions on the issue of the anthropological difference. If Portmann emphasizes the special status of the relationship between the human animal and the world, Uexküll tends to see a substantial continuity in the biosemiotic processes through which human and non-human animals constitute their species-specific worlds of experience. (shrink)

The ever-increasing dominance of English within analytic philosophy is an aspect of linguistic globalisation. To assess it, I first address fundamental issues in the philosophy of language. Steering a middle course between linguistic universalism and linguistic relativism, I deny that some languages might be philosophically superior to others, notably by capturing the essential categories of reality. On this background I next consider both the pros and cons of the Anglicisation of philosophy. I shall defend the value of English as a (...) lingua franca, while denying both the feasibility and the desirability of English as the sole universal language of philosophy. Finally I turn to the linguistic inequality in contemporary analytic philosophy. While it does not per se amount to an injustice, there is a need to level the playing field. But the remedy does not lie in linguistic academic sectarianism. Instead, what might be called for are piecemeal measures to reduce explicit and implicit biases against analytic philosophers on the geographic fringes, biases that are only partly connected to the predominance of English. (shrink)

In the paper it is shown that every physically sound Birkhoff – von Neumann quantum logic, i.e., an orthomodular partially ordered set with an ordering set of probability measures can be treated as partial infinite-valued Łukasiewicz logic, which unifies two competing approaches: the many-valued, and the two-valued but non-distributive, which have co-existed in the quantum logic theory since its very beginning.

Interaction between humans and cats in urban environments is subject to dynamic change. Based on the frequency and quality of relations with humans, we can distinguish several populations of domestic cats : pedigree, pet, semi-feral, feral, and pseudo-wild. Bringing together theoretical perspectives of the Tartu school of biosemiotics and ethological studies of animal societies, we distinguish two basic types of cat cultures: the culture of street cats and the humano-cat culture of pets. The difference between these cultures is documented on (...) the level of zoosemiotic interactions, ecological relations, and human representations. We introduce a threefold model of human-animal interactions in urban environments which steer a careful course between the Scylla of realistic ontology and the Charybdis of social constructivism. A case study on Estonian cat shelters illustrates the significance of cultural representations and institutionalized actions in human-cat cohabitation. (shrink)

Negative probabilities were several times proposed in the literature as a way to reconcile violation of Bell-type inequalities with the premise of local realism. It is argued that instead of using negative probabilities that have no physical meaning one can use for this purpose fuzzy probabilities that have sound and unambiguous interpretation.

This article focuses on the social structure of domestic cat colonies, and on the various ways these are represented in ethological literature. Our analysis begins with detailed accounts of different forms of cat societies from the works of Leyhausen, Tabor, and Alger and Alger, and then puts these descriptions into a broader epistemological perspective. The analysis is inspired by the bi-constructivist approach to ethological studies formulated by Lestel, which highlights the position of the ethologist in the constitution of particular animal (...) activities. We propose a third layer should be added to post hoc analyses of ethological enterprises: i.e., the ontological commitments shaping the conceptual framework of a given research. It is through these commitments we find a hierarchical structure in a caged colony of cats, different territorial patterns in the case of urban cats, and egalitarian friendly bonds within the society of a cat shelter. Our critical tri-constructivist approach can be utilized for contemporary biosemiotics as it is centered on a multi-level process of interpretation. (shrink)

Monitoring of MAIDMonitoring of MAID was recognised as an essential component of the MAID program. However, monitoring started late in the rollout of the program, and even at present is missing some essential elements that would be important for effective oversight and public accountability. Health CanadaCanada is using some of the data obtained from practitioners and pharmacists to produce Annual Reports on MAID, but these reports aim at providing only a “societal perspective,” rather than an in-depth assessment of the program’s (...) performance. A major deficit is lack of monitoring and reporting on the compliance with eligibility criteria and procedural safeguards that should be coming from territorial and provincial governments, and that would provide assurance that MAID delivery complies with the Criminal CodeCriminal Code of Canada. Monitoring is based entirely on self reporting and therefore it is recommended that Health Canada obtain supportive data by initiation of on-site retrospective reviews of randomly selected MAID deliveries across the country. In addition, it would be useful to enhance the quantity and quality of data collected from MAID assessors and providers. Organizations involved in MAID provisions (hospitals, regional health authorities and so on) should also report annually on MAID activities to their respective communities. Improvement of monitoring and reporting would address serious concerns among professionals, people with disabilities and advocates for vulnerable populations while providing for a higher level of transparency and accountability. (shrink)

The article aims to provide a general framework for assessing and categorizing the cognitive systems of human and non-human animals. Our approach stems from biosemiotic, ethological, and phenomenological investigations into the relations of organisms to one another and to their environment. Building on the analyses of Merleau-Ponty and Portmann, organismal bodies and surfaces are distinguished as the base for sign production and interpretation. Following the concept of modelling systems by Sebeok, we develop a concentric model of human and non-human animal (...) cognition that posits three intertwined spheres: corporeity, social communication, and culture. The model explicitly works with the pluralistic perspective that views the communication and cognition of humans as distinct, but not superior to those of non-human animals. Our position is substantiated by two case studies: the first one focuses on the acquisition and spread of nut-cracking technique among the chimpanzees in the Täi forest, the second one on the communication and cognition of deafblind persons. From an epistemological perspective, our paper is a contribution to contemporary attempts to link biosemiotics and ethology with phenomenological concepts of agency, living bodies, and lifeworld. (shrink)

The authors led the development of a framework for ethical decision-making for an Academic Health Sciences Centre. They understood the existing mission, vision, and values statement (MVVs) of the centre as a foundational assertion that embodies an ethical commitment of the institution. Reflecting the Patient and Family Centred Model of Care the institution is living, the MVVs is a suitable base on which to construct an ethics framework. The resultant framework consists of a set of questions for each of the (...) MVVs. Users of the framework are expected to identify two or more possible decisions to address the issue at hand and then, by applying the provided sequence of questions to each, examine these options and determine the overall ethically preferable decision. The construction of such a framework requires the creative involvement of the institution’s staff. Thus the development of the framework can represent a training process in ethical decision-making as well as advance the ethical atmosphere of the institution. This novel approach has the advantage of placing the MVVs on active duty, at the centre of ethical decision-making, and lifts it from its otherwise relative obscurity in most institutions. (shrink)

One of the authors has recently propounded an SR model which shows, circumventing known no-go theorems, that an objective interpretation of quantum mechanics is possible. We consider here compound physical systems and show why the proofs of nonlocality of QM do not hold within the SR model, which is slightly simplified in this paper. We also discuss quantum measurement theory within this model, note that the objectification problem disappears since the measurement of any property simply reveals its unknown value, and (...) show that the projection postulate can be considered as an approximate law, valid FAPP. Finally, we provide an intuitive picture that justifies some unusual features of the SR model and proves its consistency. (shrink)

Bell-type inequalities on orthomodular lattices, in which conjunctions of propositions are not modeled by meets but by maps for simultaneous measurements -maps), are studied. It is shown, that the most simple of these inequalities, that involves only two propositions, is always satisfied, contrary to what happens in the case of traditional version of this inequality in which conjunctions of propositions are modeled by meets. Equivalence of various Bell-type inequalities formulated with the aid of bivariate maps on orthomodular lattices is studied. (...) Our investigations shed new light on the interpretation of various multivariate maps defined on orthomodular lattices already studied in the literature. The paper is concluded by showing the possibility of using \-maps and \-maps to represent counterfactual conjunctions and disjunctions of non-compatible propositions about quantum systems. (shrink)

The social cognition of domestic cats is a scarcely studied topic due to the reputation of the animal as individualistic. Nevertheless, cats are capable of cognitively demanding cooperative activities such as a communal nest-moving. The cognitive abilities of free-ranging cats are evaluated against the background of the shared intentionality hypothesis, proposed by a research group of Michael Tomasello. Although their comparative studies are carried out on chimpanzees, they are valuable as a source of conceptual work linking empirical cognitive studies with (...) the philosophical accounts of joint agency. We critically analyze theoretical cognitive concepts interpreting the triadic interactions of great apes and the collective hunting among chimpanzees. Contrary to the shared intentionality hypothesis, it is argued that cats have cognitive abilities to share attention, truly cooperate and constitute shared meanings. Finally, we introduce the concept of the natural interaction ritual by Randall Collins and outline its significance for our case study about cats as well as for a general biosemiotic theory of the development of symbols. (shrink)