The evolution of altruism in human societies has been intensively investigated in social and natural sciences. A widely acknowledged recent idea is the “parochial altruism model,” which suggests that inter- group hostility and intragroup altruism can coevolve through lethal intergroup conflicts. The current article critically examines this idea by reviewing research relevant to intergroup conflicts in human evolutionary history from evolutionary biology, psychology, cultural anthropology, and archaeology. After a brief intro- duction, section 2 illustrates the mathematical model of parochial altruism (...) and some critiques of the model and its interpretation, primarily from an evolutionary biology point of view. Section 3 delves into the archaeological evidence of prehistoric intergroup conflicts in the Japanese archipelago’s Jomon and Yayoi periods, Europe’s Mesolithic period, and North America’s Pacific period as counter examples of the paro- chial altruism model. In section 4, the ethnographies of intergroup relationships and conflicts reveal that intergroup relationships in many ethnic groups are not as simple as the assumption in the mathematical model of parochial altruism. In section 5, we outline psychological research on intergroup conflicts which suggest that intergroup hostility and ingroup altruism are not necessarily correlated. In conclusion, we argue that the assumption and parameter settings of the parochial altruism model are inconsistent with empirical data. (shrink)

Many researchers have assumed that punishment evolved as a behavior-modification strategy, i.e. that it evolved because of the benefits resulting from the punishees modifying their behavior. In this article, however, we describe two alternative mechanisms for the evolution of punishment: punishment as a loss-cutting strategy (punishers avoid further exploitation by punishees) and punishment as a cost-imposing strategy (punishers impair the violator’s capacity to harm the punisher or its genetic relatives). Through reviewing many examples of punishment in a wide range of (...) taxa, we show that punishment is common among plant and animal species and that the two mechanisms we describe have often been important for the evolution of punishment. (shrink)

Whether man is predisposed to lethal violence, ranging from homicide to warfare, and how that may have impacted human evolution, are among the most controversial topics of debate on human evolution. Although recent studies on the evolution of warfare have been based on various archaeological and ethnographic data, they have reported mixed results: it is unclear whether or not warfare among prehistoric hunter – gatherers was common enough to be a component of human nature and a selective pressure for the (...) evolution of human behaviour. This paper reports the mortality attributable to violence, and the spatio-temporal pattern of violence thus shown among ancient hunter–gatherers using skeletal evidence in prehistoric Japan (the Jomon period: 13000 cal BC–800 cal BC). Our results suggest that the mortality due to violence was low and spatio-temporally highly restricted in the Jomon period, which implies that violence including warfare in prehistoric Japan was not common. (shrink)

The present study collected a larger set of three-dimensional data on human crania from the Kofun period (as well as from previous periods, i.e., the Jomon and Yayoi periods) in the Japanese archipelago (AD 250 to around 700) than previous studies. Three-dimensional geometric morphometrics were employed to investigate human migration patterns in finer-grained phases. These results are consistent with those of previous studies, although some new patterns were discovered. These patterns were interpreted in terms of demic diffusion, archaeological findings, and (...) historical evidence. In particular, the present results suggest the presence of a gradual geological cline throughout the Kofun period, although the middle period did not display such a cline. This discrepancy might reflect social changes in the middle Kofun period, such as the construction of keyhole-shaped mounds in the peripheral regions. The present study implies that a broader investigation with a larger sample of human crania is essential to elucidating macro-level cultural evolutionary processes. (shrink)

According to the theory of natural pedagogy, humans have a set of cognitive adaptations specialized for transmitting and receiving knowledge through teaching; young children can acquire generalizable knowledge from ostensive signals even in a single interaction, and adults also actively teach young children. In this article, we critically examine the theory and argue that ostensive signals do not always allow children to learn generalizable knowledge more efficiently, and that the empirical evidence provided in favor of the theory of natural pedagogy (...) does not defend the theory as presented, nor does it support a weakened version of the theory. We argue that these problems arise because the theory of natural pedagogy is grounded in a misguided assumption, namely that learning about the world and learning about people are two distinct and independent processes. If, on the other hand, we see the processes as interrelated, then we have a better explanation for the empirical evidence. (shrink)

Kripke-completeness of every classical modal logic with Sahlqvist formulas is one of the basic general results on completeness of classical modal logics. This paper shows a Sahlqvist theorem for modal logic over the relevant logic Bin terms of Routley- Meyer semantics. It is shown that usual Sahlqvist theorem for classical modal logics can be obtained as a special case of our theorem.

The sense of agency refers to an experience in which one’s own action causes a change in environment. It is strongly modulated by both the contingency between action and its outcome and the consistency between predicted and actual action outcomes. Recent studies have suggested that the action outcome can retrospectively modulate action awareness. We suspect that the sense of agency can also be retrospectively modulated. This study examined whether the quantity of action outcome could influence the sense of agency. The (...) participants’ task was to trigger dot motion in a display and rate the extent to which they could control the initiation of dot motion. Independently of both the temporal contiguity between action and its outcome and the consistency between predicted and actual action outcomes, the speed of dot motion as an action’s outcome strongly influenced the sense of agency rating. The present study suggests that the sense of agency stems partly from the inference of action efficiency based on the quantitative aspect of action outcome. (shrink)

January 6th, 2013 at Kyoto University. Organizer: Hisashi Nakao.

This paper reviews current situations of cultural evolutionary studies.

General frames are often used in classical modal logic. Since they are duals of modal algebras, completeness follows automatically as with algebras but the intuitiveness of Kripke frames is also retained. This paper develops basics of general frames for relevant modal logics by showing that they share many important properties with general frames for classical modal logic.

Crispin Wright in his 1982 paper argues for strict finitism, a constructive standpoint that is more restrictive than intuitionism. In its appendix, he proposes models of strict finitistic arithmetic. They are tree-like structures, formed in his strict finitistic metatheory, of equations between numerals on which concrete arithmetical sentences are evaluated. As a first step towards classical formalisation of strict finitism, we propose their counterparts in the classical metatheory with one additional assumption, and then extract the propositional part of ‘strict finitistic (...) logic’ from it and investigate. We will provide a sound and complete pair of a Kripke-style semantics and a sequent calculus, and compare with other logics. The logic lacks the law of excluded middle and Modus Ponens and is weaker than classical logic, but stronger than any proper intermediate logics in terms of theoremhood. In fact, all the other well-known classical theorems are found to be theorems. Finally, we will make an observation that models of this semantics can be seen as nodes of an intuitionistic model. (shrink)

The present study examines the 3-dimensional data of human crania from the Yayoi period (800 BC to AD 250) of the Japanese archipelago by geometric morphometrics to investigate demic diffusion patterns. This is the first study on the Yayoi crania using their 3D data and geometric morphometrics with a much larger number of skeletal remains outside of the Kyushu regions than previous studies. The comparative results between the Jōmon and Yayoi samples show that the Yayoi people not only in the (...) eastern parts but also in the western parts of the archipelago are significantly different from the final Jōmon people and the Yayoi people were not strongly affected by the Jōmon people. A relatively gradual geological cline is also found among the Yayoi population, suggesting that the immigrants from the continental East Asia moved from the western parts to the eastern parts of the archipelago though the causes of the morphological changes are unclear. (shrink)

This paper examines the theory of natural pedagogy theory especially by focusing on its explanation of overimitation.

The present research used archaeological data, i.e., the data obtained from kamekan jar burials in the Mikuni Hills of the northern Kyushu area in the Mid- dle Yayoi period, to test the parochial altruism model. This model argued that out-group hate and in-group favor coevolved via prehistoric intergroup conflicts. If this model is accurate, such an out-group hate and in-group favor could be re- flected in the archaeological remains, such as pottery making; the more frequent intergroup conflicts are and the (...) more each group is opposed, the more independent and coherent each group will be and more evident cultural identity could be estab- lished within each group. We employed an elliptic Fourier analysis for the shapes of kamekan jar burials. We examined whether frequent intergroup conflicts in the period influenced kamekan jar pottery between subareas of the Mikuni Hills. The results suggested that the shapes of kamekan jar burials after the KIIIa type are slightly different between subareas, which is partially consistent with the model. However, the results do not support the model directly. (shrink)

A logic is called metacomplete if formulas that are true in a certain preferred interpretation of that logic are theorems in its metalogic. In the area of relevant logics, metacompleteness is used to prove primeness, consistency, the admissibility of γ and so on. This paper discusses metacompleteness and its applications to a wider class of modal logics based on contractionless relevant logics and their neighbours using Slaney’s metavaluational technique.

The?-admissibility is one of the most important problems in the realm of relevant logics. To prove the 7-admissibility, either the method of normal models or the method using metavaluations may be employed. The?-admissibility of a wide class of relevant modal logics has been discussed in Part I based on a former method, but the?-admissibility based on metavaluations has not hitherto been fully considered. Sahlqvist axioms are well known as a means of expressing generalized forms of formulas with modal operators. This (...) paper shows that? is admissible for relevant modal logics with restricted Sahlqvist axioms in terms of the method using metavaluations. (shrink)

This study examines the relationship between Japanese archaeology and natural science through a quantitative analysis of the two most authoritative archaeological journals and two other relevant journals in Japan. First, although previous studies have emphasized the impact of the Department of Anthropology at the University of Tokyo on the scientific aspects of Japanese archaeology, results of the present study suggest that its impact has been more limited than previously assumed. Second, while previous studies claimed that research funding by the Japanese (...) government from the latter half of the 1970s was an important factor in developing the scientific aspects of Japanese archaeology, the present study shows a result inconsistent with the claim. Finally, although I admit that the previous studies have properly captured some aspects of the relationship between Japanese archaeology and science, I conclude that we should look at the broader array of contributors to the relationship between Japanese archaeology and natural science. (shrink)

The paper is a critical comment on Okumura & Kanakogi (2019).

The admissibility of Ackermann’s rule γ is one of the most important problems in relevant logic. While the γ-admissibility of normal modal logics based on the relevant logic R has been previously discussed, the case for weaker relevant modal logics has not yet been considered. The method of normal models has often been used to prove the γ-admissibility. This paper discusses which relevant modal logics admit γ from the viewpoint of the method of normal models.

Halldén completeness closely resembles the relevance property. To prove Halldén completeness in terms of Kripke-style semantics, the van Benthem–Humberstone theorem is often used. In relevant modal logics, the Halldén completeness of Meyer–Fuhrmann logics has been obtained using the van Benthem–Humberstone theorem. However, there remain a number of Halldén-incomplete relevant modal logics. This paper discusses the Halldén completeness of a wider class of relevant modal logics, namely, those with some Sahlqvist axioms.

BackgroundEach individual’s unique health-related beliefs can greatly impact the patient-clinician relationship. When there is a conflict between the patient’s preferences and recommended medical care, it can create a serious ethical dilemma, especially in an emergency setting, and dramatically alter this important relationship.Case presentationA 56-year-old man, who remained comatose after out-of-hospital cardiac arrest, was rushed to our hospital. The patient was scheduled for emergency coronary angiography when his adolescent daughter reported that she and her father held sincere beliefs against radiation exposure. (...) We were concerned that she did not fully understand the potential consequences if her father did not receive the recommended treatment. A physician provided her with in depth information regarding the risks and benefits of the treatment. While we did not want to disregard her statement, we opted to save the patient’s life due to concerns about the validity of her report.ConclusionsVariations in beliefs regarding medical care force clinicians to incorporate patient beliefs into medical practice. However, an emergency may require a completely different approach. When faced with a patient in a life-threatening condition and unconscious, we should take action to prioritize saving their life, unless we are highly certain about the validity of their advance directives. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Guest Editor’s IntroductionNakajima Takahiro 「東京学派」とは聞きなれない名称であろう。日本研究において「京都学派」は大変よく知られている。たとえ「京都学派」が、「無の論理は論理ではない」と述べた上で、戸坂潤が発明した批判的な概念であったとしても 、現在ではそれは西田幾多郎や田辺元を中心とした一大哲学運動として世界的に認知されている。ところが、西田にしても田辺にしてももともとは東京帝国大学で学んだ学生であった。また、戦前においては、井上哲次郎か ら桑木厳翼へと続く東京帝国大学哲学科の流れは、当時の社会状況と相互に影響しあって、一定の意義を示していたのである。また、大森荘蔵、廣松渉、坂部恵といった戦後の東京大学の哲学者たちは、「京都学派」の問題 系を乗り越えることを重視していた。 この特別号では、発見的概念として「東京学派」を用いて、戦前・戦後におけるその意義と広がりを探究することにした。それは東京大学もしくは東京帝国大学に限定されたものではなく、それ以外の東京圏の大学との相互 交流も含まれるものである。「京都学派」に対しては、政治との距離をどう測るかがしばしば議論されてきたが、「東京学派」は政治により密着したものである。日本の近代の哲学の有している政治性そして倫理性を考える のであれば、やはり「東京学派」の議論は避けて通る ことのできないものである。 無論、「学派」というほどのまとまりを「東京学派」が有しているわけではないことも確かである。西田幾多郎が「京都学派」で果たした中心性は、「東京学派」にはない。そこで、トマス・カスリスが示唆するように、「 学派」の代わりに「サークル」や「スタイル」という言葉を使った方がより正確かもしれない。それでも、あえて「東京学派」と呼ぶのは、「京都学派」に比べて関心を持たれることの少ない、しかし当時は圧倒的な影響力 を有し、戦後決定的に忘却されていった東京の哲学者たちに光をあて、近代日本の哲学の総体を明らかにしたいからである。「東京学派」の研究は緒についたばかりである。今後、国際的な研究の高まりを期待しながら擱筆 する。The “Tokyo School” may be an unfamiliar term to readers. The Kyoto School is very well known in Japanese studies. Even if the Kyoto School is a critical concept invented by Tosaka Jun, who stated [End Page 2] that “the logic of nothingness is not logic,” it is now recognized worldwide as a major philosophical movement led by Nishida Kitarō and (...) Tanabe Hajime. However, both Nishida and Tanabe were originally students at Tokyo Imperial University. In addition, before the war, the output of the Department of Philosophy at Tokyo Imperial University, from Inoue Tetsujirō to Kuwaki Gen’yoku, had a certain significance because it interacted with the social conditions of the time. In addition, postwar philosophers at the University of Tokyo, such as Ōmori Shōzō, Hiromatsu Wataru, and Sakabe Megumi emphasized overcoming the problematics of the Kyoto School.In this special issue, we use the Tokyo School as a heuristic concept to explore its significance and spread in the prewar and postwar periods. It is not limited to the University of Tokyo or Tokyo Imperial University but includes interactions with other universities in the Tokyo area. While the Kyoto School has often been discussed in terms of how to measure its distance from politics, the Tokyo School is more closely connected to politics. If we consider the political and ethical dimensions of modern Japanese philosophy, we cannot avoid discussing the Tokyo School.Of course, it is true that the Tokyo School is not as coherent as a “school.” The central role that Nishida fulfilled in the Kyoto School is perhaps lacking in the Tokyo School. Therefore, as Thomas P. Kasulis suggests, it might be more accurate to use the term “circle” or “style” instead of “school.” Nevertheless, I dare to call it the Tokyo School because I would like to shed light on the Tokyo philosophers who were less popular than those of the Kyoto School but whose influence was overwhelming at the time and who were definitively forgotten after the war, so as to clarify the totality of philosophy in modern Japan.Research on the Tokyo School has only just begun. I am writing this introductory note in anticipation of further international research on the Tokyo School. [End Page 3]Copyright © 2023 State University of New York Press... (shrink)

The book includes some examples of cultural evolutionary studies on archaeological remains in Japan.

Dysfunctional attentional control is observed in patients with mental disorders. However, there is no established neurophysiological method to assess attention in such patients. We showed a discrepancy in alpha-band power in the tasks that evoked internal and external attention event-related alpha-band power changes in healthy subjects during self-reflection and working memory tasks in a preliminary study. In this study, we aimed at elucidating event-related alpha-band power changes in healthy subjects during the tasks, addressing the shortcomings of the previous study. Sixteen (...) healthy volunteers were examined for the event-related power change during the tasks. The results demonstrated the discrepancy of alpha-band ERpow at 8, 10, and 12 Hz in the parieto-occipital area between the WM and SR tasks for a period between a target stimulus and a command stimulus, where a participant switched to internal attention from external attention according to the SR task and remained at external attention according to the WM task. The results suggest that alpha-band ERpow in this area is associated with the direction of attention in response to cognitive stimuli, indicating that the findings of ERpow during the two tasks would potentially aid in the clarification of the pathophysiology of the dysfunctional change in attention in patients with psychiatric disorders. (shrink)

The admissibility of Ackermann's rule γ is one of the most important problems in relevant logics. The admissibility of γ was first proved by an algebraic method. However, the development of Routley-Meyer semantics and metavaluational techniques makes it possible to prove the admissibility of γ using the method of normal models or the method using metavaluations, and the use of such methods is preferred. This paper discusses an algebraic proof of the admissibility of γ in relevant modal logics based on (...) modern algebraic models. (shrink)

A classical reconstruction of Wright’s first-order logic of strict finitism is presented. Strict finitism is a constructive standpoint of mathematics that is more restrictive than intuitionism. Wright sketched the semantics of said logic in Wright (Realism, Meaning and Truth, chap 4, 2nd edition in 1993. Blackwell Publishers, Oxford, Cambridge, pp.107–75, 1982), in his strict finitistic metatheory. Yamada (J Philos Log. https://doi.org/10.1007/s10992-022-09698-w, 2023) proposed, as its classical reconstruction, a propositional logic of strict finitism under an auxiliary condition that makes the logic (...) correspond with intuitionistic propositional logic. In this paper, we extend the propositional logic to a first-order logic that does not assume the condition. We will provide a sound and complete pair of a Kripke-style semantics and a natural deduction system, and show that if the condition is imposed, then the logic exhibits natural extensions of Yamada (2023)’s results. (shrink)

This paper aims to show that two eminent Marxists in the 1930s, the Italian Antonio Gramsci and the Japanese Tosaka Jun, shared three important characteristics of so-called Western Marxism: the methodological development of Marxism, the focus on the superstructure, and the pessimism about the impossibility of immediate revolution. Showing that Gramsci and Tosaka shared these characteristics enables us to revisit the framework of “Western Marxism,” which confusingly consists of both theoretical characteristics and geographical criteria. Looking at Gramsci and Tosaka on (...) the same plane allows us to revisit Marxist thought different from the orthodox Marxism in Soviet Russia, and not strictly as a Western, but as a part of potentially global movement of thought. (shrink)

In motion-induced blindness , a target within rotating random dots is occasionally hidden from observers’ consciousness during observation. In the present study, a red ring-like cue was centered on a target and presented immediately after observers reported subjective disappearance of the target in MIB . The radius of the cue was systematically modulated. Observers quickly regained awareness of the disappeared object only after they were provided with a pinpoint cue of its location. We also found that a flickering cue at (...) 1 Hz hindered MIB when the radius of the cue was critically small . Furthermore, abrupt onset of a small square was enough to regain awareness of the target . Successful revival of the target with a small cue indicates that critical spatial distribution of visual attention determines what in the visual scene is included in visual awareness. (shrink)

Recently, several funding agencies have introduced the distribution of funds by a lottery system; however, its effects on the productivity of the research community are unclear. Simulation studies in philosophy of science have argued that a combination of peer review and lottery is an optimal method. However, these models overlook several important aspects of research activities, such as baseline funding through block grants. In this study, I constructed a general theoretical model that incorporates these aspects and argue that the conventional (...) combination of peer review and baseline funding outperforms the combination of peer review and lottery in many situations. (shrink)

Antonio Gramsci rigorously analysed the modern transformation of the Catholic Church and its strategy to spread its worldview to the Italian masses through secular means. His critique of the Church largely drew on his examination of the grounds that ensured Croce’s critique was doomed to failure. Despite its harshness, Croce’s critique failed because he did not grasp that the main target of the Church’s strategy was the common sense of the masses, while Croce pursued his critique in a highly idealist (...) manner, appealing only to his fellow intellectuals. He thereby, according to Gramsci, helped to reinforce the Church’s strategy by endorsing the rigid separation between the intellectuals and the masses. In contrast, unlike Croce and orthodox Marxism, Gramsci did not dismiss religion as a mere absurdity, recognising it as a source of people’s common sense that, albeit confusing in nature, informed their worldview. Gramsci considered that even the common sense of the masses constituted an appropriate grasp of the world, or ‘good sense’. In this sense, Gramsci’s critique of religion echoed his preoccupation with the longstanding division of Italian society between the intellectuals and the masses, which prevented mass participation in politics. (shrink)

Gramsci’s concept of the “ethical state” has been interpreted as a synonym for the “regulated society”—a future society in which everybody participates in governance following the rationalization o...

帝国主義全盛の時代に武断的侵略的帝国主義に対し「倫理的帝国主義」を高唱。評価が分かれる稀代の自由主義思想家の実像に肉薄。.

Previous studies have confirmed that the temporal attentional control created by the repetition of stimulus-response compatibility (SRC) tasks was transferred to shooting skills in lacrosse players. In the current study, we investigated whether combining motor imagery training with SRC tasks could enhance the scoring ability of lacrosse players. We grouped 33 male lacrosse players into three groups: an SRC task and motor imagery group (referred as to SRC+Image), an SRC task group, and a control group. Players in the first two (...) groups underwent five sessions of 200 SRC task trials. In addition, the SRC+Image group completed five sessions of motor imagery training. The control group underwent no training interventions. All three groups performed a lacrosse shooting test and a Simon task before and after training sessions to assess the magnitude of the interference effects of the various types of training they underwent. The results of the Simon task showed that repetition of 1,000 trials was enough to create a short-term representation with the incompatible special mapping being transferred to a dynamic activity like lacrosse shooting. Moreover, combination of a computer-based Type 2 task and motor-imagery training could effectively increase players’ scoring ability in a field of large spatial conflict. (shrink)

When an elastic material is horizontally stretched, the material is compressed vertically – so-called the Poisson effect. In the different case of the Poisson effect, when an elastic material is vertically squashed, the material is horizontally extended. In both cases, the visual system receives image deformations involving horizontal expansion and vertical compression. How does the brain disentangle the two cases and accurately distinguish stretching from squashing events? Manipulating the relative magnitude of the deformation of a square between horizontal and vertical (...) dimensions in the two-dimensional stimuli, we asked observers to judge the force direction in the stimuli. Specifically, the participants reported whether the square was stretched or squashed. In general, the participant’s judgment was dependent on the relative deformation magnitude. We also checked the anisotropic effect of deformation direction [i.e., horizontal vs. vertical stretching ] and found that the participant’s judgment was strongly biased toward horizontal stretching. We also observed that the asymmetric deformation pattern, which indicated the specific context of force direction, was also a strong cue to the force direction judgment. We suggest that the brain judges the force direction in the Poisson effect on the basis of assumptions about the relationship between image deformation and force direction, in addition to the relative image deformation magnitudes between horizontal and vertical dimensions. (shrink)