Something should be done for a better global environment as soon as possible. This paper investigates the direction of management of the global environment and proposes new, concrete ideas for it.

Biobanks act as the custodians for the access to and responsible use of human biological samples and related data that have been generously donated by individuals to serve the public interest and scientific advances in the health research realm. Risk assessment has become a daily practice for biobanks and has been discussed from different perspectives. This paper aims to provide a literature review on risk assessment in order to put together a comprehensive typology of diverse risks biobanks could potentially face. (...) Methodologically set as a typology, the conceptual approach used in this paper is based on the interdisciplinary analysis of scientific literature, the relevant ethical and legal instruments and practices in biobanking to identify how risks are assessed, considered and mitigated. Through an interdisciplinary mapping exercise, we have produced a typology of potential risks in biobanking, taking into consideration the perspectives of different stakeholders, such as institutional actors and publics, including participants and representative organizations. With this approach, we have identified the following risk types: economic, infrastructural, institutional, research community risks and participant’s risks. The paper concludes by highlighting the necessity of an adaptive risk governance as an integral part of good governance in biobanking. In this regard, it contributes to sustainability in biobanking by assisting in the design of relevant risk management practices, where they are not already in place or require an update. The typology is intended to be useful from the early stages of establishing such a complex and multileveled biomedical infrastructure as well as to provide a catalogue of risks for improving the risk management practices already in place. (shrink)

This article argues that Mariam uses its eponymous heroine's lived and embodied experiences of veiling to explore the impact of French secular legislation on Muslim schoolgirls' everyday lives in F...

In lieu of an abstract, here is a brief excerpt of the content:Report on the Thirtieth Annual Conference of the Japan Society for Buddhist-Christian StudiesYagi YōichiTranslated by Paul L. SwansonIn Japan, the disasters of the giant tsunami and the resulting crisis at the Fukushima nuclear power plant on 11 March 2011 have been grim reminders of the unprecedented tragedies of the nuclear bombings on Hiroshima and Nagasaki just sixty-six years ago. These are experiences in which one becomes speechless, when words (...) are no longer able to convey what used to be their usual meaning.At that time, people were faced with basic and universal questions concerning the fundamental constitution of human existence. What is the ultimate basis for our thoughts and actions? Is there a way to know? If there is a way to know these answers, how do we attain them? The state of intellectual inquiry in postwar Japan, however, was not able to face these questions and come up with answers. Rather, there was a tendency to avoid facing these questions directly and instead rely on absorbing the pronouncements of Western thought.Within this postwar intellectual environment in Japan, the Japan Society for Buddhist- Christian Studies has continuously attempted in an academic way to discuss comprehensive themes, based on Buddhist-Christian or Christian-Buddhist foundations, and is perhaps the only forum in Japan that has consistently sought answers to these basic and universal questions of human existence.It was in this time of crisis that the thirtieth annual conference of the Japan Society for Buddhist-Christian Studies met 5-7 September 2011 at Hanazono University in Kyoto. Discussion of a recent book, Dialogue and Commentary: The Words of Jesus and the Words of Zen (対談評釈 イエスの言葉／ 禅の言葉, Iwanami Shoten, 2010, in Japanese), a series of dialogues and discussions between Ueda Shizuteru and Yagi Seiichi, was chosen as an appropriate theme for this meeting. This book was chosen because it is a splendid synthesis of the activity and discussion carried out by our Society over the past thirty years. Through the magnificent dialogue of these two men, we hoped to open a "living horizon" for a mutual understanding of "the words of Jesus and the words of Zen." The main themes were "direct experience," "self-awareness," "place," and "words."The two dialoguers—Ueda and Yagi—have not only both served and provided [End Page 139] leadership for the Society over many years, as presidents and in other capacities, but also share a basic sense of fundamental questions. They are also leading philosophers of religion who represent the attempt to seek answers to fundamental questions within Buddhism and Christianity in postwar Japan. Ueda Shizuteru, a leading authority and internationally recognized scholar of Meister Eckhart, is also known for his contributions on the philosophy of religion (especially the idea of "place"/basho) in the tradition of Nishida Kitarō, Nishitani Keiji, and Zen Buddhism. His basic philosophical statement is "I am I when I am not I." Yagi Seiichi, on the other hand, is known for promoting religion (philosophy) as "a logic of place" as seen in the New Testament, and for his historical and essentialist critique of New Testament thought. To Yagi, the essence of "the religion of Jesus" is religion as a "logic of place," and if we return to this place we can (to borrow the exquisite phrasing of Yagi himself) "drink directly from the same fountain that was discovered by Jesus." Through this experience we can transcend not only biblical fundamentalism and the exclusivist absolutism of Christianity, but also make it possible to have a true dialogue with other religions. For Yagi, the dialogue between Buddhism and Christianity not only should deepen common understanding, but also open the way to mutual reform, clarify the truth that flows at the basis of both religions, and probe into the fundamental constitution of human existence, and this is why he has constantly sought after dialogue with Buddhists.Yagi Seiichi has stood out as a partner in dialogue for many years. His discussions with the Zen master Hisamatsu Shin'ichi (A Religion of Awakening, published in 1980) was an epochal event in intellectual history from the perspective of "Buddhism and Christianity." Yagi has also been involved in important dialogues with Nishitani... (shrink)

With agents relying more and more on information from central servers rather than their own sensors, knowledge becomes property not of a specific agent but of the data that the agents can access. The article proposes a dynamic logic of data-informed knowledge that describes an interplay between three modalities and one relation capturing the properties of this form of knowledge. The main technical results are the undefinability of two dynamic operators through each other, a sound and complete axiomatisation, and a (...) model checking algorithm. (shrink)

Geçmişte yazılan ve kütüphanelerimizde çoğu yazma hâlinde duran pek çok ilmî eserin isim, müellif ve mütercimlerinin tespiti konusunda ciddî hatalar yapıldığı görülmektedir. Bu da bir kısım önemli eserlerin gün yüzüne çıkmasını engelleyerek sahip olduğumuz hazineden gereği gibi istifade etme imkânını elimizden almaktadır. Bu minvalde bazı araştırma ve kütüphane kayıtlarında 15. yüzyıl Osmanlı âlimlerinden Mûsâ İznikī’nin (öl. 838/1434-35 [?]), Ali b. Muhammed el-Hâzin’in (öl. 741/1341) Lübâbü’t-teʾvîl fî meʿâni’t-Tenzîl adlı tefsirini tercüme ettiği bilgisi yer almıştır. Aynı şekilde yine 16. Yüzyılda yaşamış bir (...) Osmanlı âlimi ve divan şâiri olan Muslihuddin Mustafa Sürûrî’nin (öl. 969/1562) tam bir Türkçe tefsir yazdığı iddia edilmektedir. Bu iki iddia, sonuçta aynı mütercim üzerinde birleşmeleri sebebiyle ortak bir noktaya sahiptirler. Bu makalede, bahsedilen iki eserin asılları ve tercümeleri etrafında bir araştırma yapılarak bunların gerçekte kime ait oldukları ve isimlerinin ne olduğu ortaya çıkarılmaya çalışılacaktır. Bu tür araştırmaların kütüphanelerimizdeki binlerce eser için âcilen yapılmasının bir zaruret hâlini aldığı âşikârdır. Zira bazı araştırmacıların bu tür yanlış bilgiler üzerine yüksek lisans ve doktora tezleri binâ ettikleri ve çeşitli makaleler yazdıkları görülmektedir. Bu makalenin maksadı, yukarıda zikredilen ve haklarında yanlış bilgiler ile bazı kapalı noktalar bulunan iki eserle ilgili bir takım yeni tespitleri ortaya koyarak hem ilim dünyasına katkıda bulunmak hem de bu alanda yapılacak çalışmalara olan ihtiyaca dikkat çekmektir. Doküman tarama, veri toplama ve veri analizi yöntemi kullanılan bu araştırma neticesinde şu sonuçlara varılmıştır: Mûsâ el-İznikī’nin tercüme ederek Tefsîru’l-Lübâb ismini verdiği eser aslında Hâzin’in Lübâbü’t-te’vîl’i değil Necmeddîn-i Dâye’nin (öl. 654/1256) Baḥrü’l-ḥaḳāʾiḳ ve’l-meʿânî isimli tefsirinin muhtasarıdır. Bundan hareketle tespit edilen diğer bir nokta da şu olmuştur ki günümüzde et-Teʾvîlâtü’n-Necmiyye ismiyle meşhur olan eser Dâye’nin kaleme aldığı tefsirin orijinal hâli değildir. Dâye zâhiri ve işârî tefsîri cem eden mufassal bir tefsir telif etmiş, müridlerinden biri olan Şemseddin Muhammed es-Savcı da, zâhirî tefsir kısımlarını çıkarıp sadece işârî yorumları bırakmak sûretiyle bu eseri telhis etmiştir. İznikī de işte bu telhisi tercüme etmiş ve eserine Tefsîru’l-Lübâb ismini vermiştir. Sürûrî’ye nispet edilen tefsirin de onun tarafından telif edilmediği tespit edilmiştir. Yapılan mukayeseler neticesinde bu eserin Ebü’l-Leys Semerkandî’nin (öl. 373/983) Tefsîrü’l-Ḳurʾâni’l-Kerîm veya Tefsîru Ebi’l-Leys̱ es-Semerḳandî diye anılan ve bugün Baḥrü’l-ʿulûm ismiyle basılan kitabının tefsîrî bir tercümesi olduğu ortaya çıkmıştır. Bu tercüme bazı kaynaklar ile kütüphane kayıtlarında aynı anda hem Ahmed-i Dâî’ye (öl. 824/1421’den sonra), hem İbn Arabşah’a (öl. 854/1450) ve hem de İznikī’ye nispet edilmektedir. Farklı kişilere nispet edilen nüshalar karşılaştırıldığında hepsinin aynı eser olduğu görülmüştür. Bazı kadîm nüshalarda görülen ferağ kayıtları ile yazma nüshalar üzerinde yapılan incelemeler bu tercümenin de yine İznikī tarafından yapıldığını göstermektedir. İznikī bu ikinci tercümesine Enfesü’l-Cevâhir ismini vermiştir. İlim dünyasında bu isim konusunda da bir karışıklık olmuş, bazı araştırmacılar onun Hâzin tefsirinin tercümesine verildiğini zannetmişlerdir. Ancak ilk devir yazmalarında bu ismin Semerkandî tefsirinin tercümesine verildiği açıkça görülmektedir. Kütüphanelerimizde Enfesü’l-Cevâhir’in muhtasar nüshalarına da rastlanmış ancak bu ihtisar faaliyetinin kimin tarafından yapıldığı tespit edilememiştir. (shrink)

The various schools of the Indian classical philosophy have discussed the issue how we understand the meaning from an utterance. In the present paper, I analyse the ancient controversy on this issue between two schools, Naiyāyikas and Vaiśeṣikas, and attempt to show that it has two aspects of religious and epistemological natures. Vaiśeṣikas, on the ground that the process of the verbal understanding is identical with that of the inference, claim that the verbal understanding is merely a type of the (...) inference. Naiyāyikas oppose this and assert that the former is distinct from the latter. I summarise Vaiśeṣikas’ argument into two points: (1) the similarity of the objects of the cognition and (2) that of the relations between the object and what denotes it. Naiyāyikas rejects both thesimilarities. The above discussion, which may stimulate our epistemological interest, has a close connection with the issue of scriptures. The utterance as a source of knowledge seems to have stood, in the early period, only for the scriptures, as pointed out by Hiryanna. Taking this into consideration, Vaiśeṣikas’ thesis can be understood to imply that they deny the intrinsic authority of scriptures and reduce it to the rational faculty of human beings. Naiyāyikas also deny itsintrinsic authority, but their view on the cognitive process of the verbal understanding is different from that of Vaiśeṣikas. The reason of this divergence may lie in how they treat the reliability of the speaker in respect to the cognitive process. (shrink)

ABSTRACT In this article I discuss Bernardine Evaristo’s Girl, Woman, Other as a transmodern narrative that gives voice to a marginalised group of black women living in Britain. Written in a hybrid style that combines prose and poetry and eschewing punctuation and long sentences, the novel interweaves sundry stories from the late nineteenth to the twenty-first century set in countries ranging from Africa, the Caribbean, and America to Britain. This networked structure exposes transtemporal and transnational patterns of diversity, connectedness and (...) relationality, as well as the distinctive genealogy of black British women and their maternal empowerment. I argue that the resilience of the characters in the face of social, racial and gender marginalisation springs from their empathic relatedness and solidarity. This emphasis on the importance of care for the other highlights the need for improving not only women’s rights and socioeconomic opportunities but of benefiting humanity on a broader scale. (shrink)

This article conducts a decision theoretic analysis of the effect of dual candidacy on voting decisions in the Japanese variant of the mixed electoral system, where each candidate can run in both a single-member district (SMD) and a proportional representation (PR) block, and dual candidates can be ranked either individually or equally in parties' PR lists: their post-election ranking is determined by their SMD votes. The model shows that dual candidacy differentiates the mixed system from merely the simultaneous use of (...) the SMD and PR systems. That is, if an SMD candidate also runs in the PR block, it lowers voters' utility increment obtained by casting their SMD votes for him. If he is ranked equally in the PR list, however, SMD votes for him may help him win a PR seat against other equally ranked dual candidates, which enables dual candidacy accompanied by equal ranking to attract more SMD votes. (shrink)

Sewall Wright and Gustave Malécot developed important theories of isolation by distance. Wright’s theory was statistical and Malécot’s probabilistic. Because of this mathematical difference, they were not clear about the relationship between their theories. In this paper, I make two points to clarify this relationship. First, I argue that Wright’s theory concerns what I call ecological isolation by distance , whereas Malécot’s concerns what I call genetic isolation by distance . Second, I suggest that if Wright’s theory is interpreted appropriately, (...) a previously unnoticed connection between the two theories emerges. †To contact the author, please write to: Yoichi Ishida, Department of History and Philosophy of Science, University of Pittsburgh, 1017 Cathedral of Learning, Pittsburgh, PA 15260; e‐mail: [email protected]. (shrink)

Stein has raised a fundamental problem for any attempt to characterize instrumentalism and realism as substantive alternatives. This is the distinguishability problem, which consists in the problem of developing a form of instrumentalism that is substantially different from a plausible realist alternative and the problem of showing that this form of instrumentalism does justice to actual scientific practice. Using Stein’s own discussion of Maxwell, I formulate instrumentalism and realism as a scientist’s attitudes toward models, where an attitude is understood to (...) be a complex of the scientist’s belief and intention regarding models. Developing a case study of Benzer’s modeling practice, I show that each attitude can structure inquiry differently and argue that to understand certain aspects of scientific practice, such as the practice of genetic mapping in Benzer’s work, we sometimes need to appeal to the coexistence of these attitudes. (shrink)

There is a confusion over and inchoate understanding of how the past is made understandable through postmodernist historical orientation. The purpose of the article is to outline the characteristic features of the postmodernist movement in social sciences, to explain its confrontation with history, to document its critique of the conventional practice of history, and to discuss its implications for history education. The postmodernist challenge to the foundations of the discipline of history is elucidated with an emphasis on its epistemological underpinnings. (...) Implications of postmodernism for the teaching and learning of history are discussed. (shrink)

The ayn-dayn distinction in Ḥanafī legal thought shapes directly many regulations related to the law of obligations, from the legitimacy conditions of the contracts to the principles of compensation obligation. Three aspects are important in understanding the formative function of this distinction. The first of them is what is the conceptual content of ayn and dayn in Ḥanafī terminology. The second of them is what kind of relationship there is between the qualities of goods and ayn and dayn. The third (...) of them is what kind of differences exist between ayn and dayn in terms of their effects on legal regulations. According to Ḥanafī terminology, in a debt relationship, dayn means goods that have not yet been delivered to the creditor, whether they are in the hands of the debtor or not, in terms of goods (gold, silver and money) that are not suitable for determination by determining. Dayn represents the identical goods that is under the responsibility of the debtor in terms of non-existing identical goods. In terms of existing identical goods, dayn represents the identical goods that exist in clusters but have not yet been determined individually. Non-standard goods are goods that are not suitable for dayn because they are not suitable for abstraction from their material existence. Ayn represents the existing and determined goods in terms of non-standard goods and existing identical goods. Ayn represents the goods received by the creditor in terms of gold, silver, money and identical goods that are in the debtor's obligation from the beginning. What stands out among the differences between ayn and dayn is that although destruction and damage can be considered for ayn, they cannot be considered for dayn. In terms of some legal regulations, establishing a relationship between strict liability and dayn and between fault liability and ayn is a result of this. The other important differences between ayn and dayn are the fact that dayn is only determined by delivery and that postponement and remittance are specific to the dayn. (shrink)

In Ḥanafī legal thought, ta‘ātī (mutual delivery of goods and price) has been seen as a sales contract without the need for an additional legal transaction. This situation raises the question of whether the delivery transaction took place after a void (bāṭil) or invalid (fāsid) sales contract can be considered as a new contract that is revealed through ta‘ātī. In this study, which we aim to answer the aforementioned question, first of all, the issue of what kind of relationship is (...) established between the definition of the sales contract and the legitimacy of the ta‘ātī is discussed. Secondly, the relationship between the principles of “When something is void, what is implicit in that thing is also void.”, “What builds on what is invalid is also invalid” and the delivery transaction that took place after a void or invalid contract is discussed. Thirdly, it has been discussed whether the acceptance of the delivery transaction after a void or invalid contract as a new contract is dependent on the fact that the first contract has been legally terminated. In Ḥanafī thought two approaches have emerged regarding the relationship between ta‘ātī and void or invalid contract. According to Ḥanafī jurists based on the above-mentioned two principles, the delivery transaction that took place after a void or invalid contract is not a new contract. The fact that the delivery transaction becomes a new contract depends on the fact that the first contract was terminated in a legal way. In the approach of Ḥalvānī and Kāsānī, the fact that the delivery transaction that took place after a void or invalid contract gains the quality of a new contract is not dependent on the fact that the first contract is legally terminated. This approach is very important in terms of making it possible for the idea that “Delivery that took place after a void or invalid contract has the quality of a new contract.” to attribute the classical Ḥanafī thought. (shrink)

As in all languages, Arabic and accordingly Quran which was revealed in a clear, fluent form of Arabic language, have words and concepts that are used in various meanings. The root “SHB” is one of these words which express different meanings depending on its context. This word is used ninety seven times in name and verb form in Quran to express “the togetherness/conversation which is constituted in different places and times, by people who have different ideas and beliefs, among themselves (...) (believer- believer or nonbeliever – nonbeliever) and with others (believer – nonbeliever) in this world and in the Hereafter”. -/- In this study, the basic/root meaning of the root “SHB” is identified firstly by the help of classical dictionaries, commentaries of Quran, and poems. Then the use of this word in Quran in name and verb forms is pointed, and its meanings which differ according to the verse, to the attaching words and to the context are identified. (shrink)

Robert MacArthur's mathematical ecology is often regarded as ahistorical and has been criticized by historically oriented ecologists and philosophers for ignoring the importance of history. I clarify and defend his approach, especially his use of simple mathematical models to explain patterns in data and to generate predictions that stimulate empirical research. First I argue that it is misleading to call his approach ahistorical because it is not against historical explanation. Next I distinguish three kinds of criticism of his approach and (...) argue that his approach is compatible with the first two of them. Finally, I argue that the third kind of criticism, advanced by Kim Sterelny and Paul Griffiths, is largely irrelevant to MacArthur's approach. ‡I am especially grateful to Thomas Nickles for encouragement and helpful comments on earlier versions of this paper. Thanks also to Guy Hoelzer, Stephen Jenkins, and Jay Odenbaugh for comments on an earlier draft, Kim Sterelny for clarifications of the Tasmania example, Gregory Mikkelson for references, and the audience at PSA 2006 for discussions. †To contact the author, please write to: Department of History and Philosophy of Science, University of Pittsburgh, 1017 Cathedral of Learning, Pittsburgh, PA 15260; e-mail: [email protected]. (shrink)

Understanding whether the long and elaborate songs of male gibbons have syntax and hierarchical structures is an interesting question in the evolution of language, because gibbons are near humans in the phylogenetic tree and a hierarchically organized syntax is considered to be a basic component of human language. We conducted field research at Danum Valley Conservation Area in northern Borneo to test the hypothesis that gibbon songs have syntax and chunks. We followed one Mueller’s gibbon group for 1 week in (...) the dry and rainy seasons every year from 2001 to 2009, collecting vocal and behavioral data. Results show that songs emitted by the studied male gibbon were governed by combinatory rules. Some context-dependent songs had different combinatory rules, although they overlapped with the songs whose contexts were uncertain. The male Mueller’s songs had characteristics that suggest existence of chunk structure. These results provided an important perspective in the study of language origin. (shrink)

It is one of the main allegations impelled by feminist theorists against Kant's philosophy that the subject Kant placed at the base of his understanding of rationality is masculine, a Westerner and belongs to upper/middle class. In fact, there is considerable supporting evidence to promote this claim for mainstream Western philosophy in general and Kant's philosophy in particular. On the other hand, while reckoning with the history of philosophy, and examining whether it is possible to break away from philosophical concepts (...) and categories or not, is another matter of discussion. In this article, I try to focus on various possibilities that can reconcile Kant's philosophy with the demands of liberal feminism and an inclusive democratic participation principle. It is important that to discuss whether it is possible to make a new reading that can be reconciled with feminist demands by ignoring the misogynistic discourses in Kant's works, especially starting from the concepts of autonomy and personality. Today, many factors like traditions, prejudices, oppressive forms of government, etc. prevent women from taking part in public life as free agents and autonomously, and from being considered as “subjects with the status of rights”. Therefore, I argue that Kant's concepts such as autonomy, becoming a person and having the conditions for free action, do have something in common with feminist demands. (shrink)

Seit einiger Zeit mehren sich in der Fichte-Forschung die Versuche, Fichtes Philosophie aus ihrer Interpretation durch Hegel herauszulösen und damit ihre Eigenständigkeit neu sichtbar zu machen. Dabei wird u.a. die Auffassung vertreten, Hegel habe Fichte falsch oder zumindest einseitig verstanden, wenn er in seiner Differenzschrift oder in Glauben und Wissen dessen Philosophie als »Reflexionsphilosophie« oder »formalen Idealismus« bezeichnet. Dagegen gibt es Stimmen, die Hegels Interpretation Fichtes als gerechtfertigt verteidigen. Diese Diskussion verweist nicht nur auf Defizite in den philosophischen Theorien von (...) Fichte und Hegel, die nicht geleugnet werden können, sondern mehr noch darauf, dass es in den Standpunkten beider erhebliche Unterschiede gibt, die zunächst herausgearbeitet und bedacht werden müssen. (shrink)

Seit einiger Zeit mehren sich in der Fichte-Forschung die Versuche, Fichtes Philosophie aus ihrer Interpretation durch Hegel herauszulösen und damit ihre Eigenständigkeit neu sichtbar zu machen. Dabei wird u.a. die Auffassung vertreten, Hegel habe Fichte falsch oder zumindest einseitig verstanden, wenn er in seiner Differenzschrift oder in Glauben und Wissen dessen Philosophie als »Reflexionsphilosophie« oder »formalen Idealismus« bezeichnet. Dagegen gibt es Stimmen, die Hegels Interpretation Fichtes als gerechtfertigt verteidigen. Diese Diskussion verweist nicht nur auf Defizite in den philosophischen Theorien von (...) Fichte und Hegel, die nicht geleugnet werden können, sondern mehr noch darauf, dass es in den Standpunkten beider erhebliche Unterschiede gibt, die zunächst herausgearbeitet und bedacht werden müssen. (shrink)

Mueller's gibbons ( Hylobates muelleri ) sing both sex-specific and duet songs. These songs are thought to be involved in territory maintenance, as well as the maintenance of pair or family bonds. However, few observational studies have examined how gibbons interact with their neighbors through song in the wild. We have been conducting field observations of wild gibbon groups in northeast Borneo since 2001. In the Borneo Rainforest Lodge (BRL) and Danum Valley Field Center (DVFC) at the Danum Valley Conservation (...) Area (DVCA), we observed seven episodes of alternating songs between males. Here, we describe the process of song exchange between males. During male interactions, song bouts rarely overlapped and were alternately emitted. Several studies have reported antiphonal vocalizations in New World and Old World primate species, but rarely in apes. Our observations of antiphonal songs in gibbons indicate that gibbons not only unilaterally advertise information, but also interactively communicate with neighbors and family members through songs. Since gibbons are phylogenetically similar to humans, and turn-taking has an important role in human conversation, our research on gibbon communication may provide insight into the evolution of human language. (shrink)

Mueller’s gibbons sing both sex-specific and duet songs. These songs are thought to be involved in territory maintenance, as well as the maintenance of pair or family bonds. However, few observational studies have examined how gibbons interact with their neighbors through song in the wild. We have been conducting field observations of wild gibbon groups in northeast Borneo since 2001. In the Borneo Rainforest Lodge and Danum Valley Field Center at the Danum Valley Conservation Area, we observed seven episodes of (...) alternating songs between males. Here, we describe the process of song exchange between males. During male interactions, song bouts rarely overlapped and were alternately emitted. Several studies have reported antiphonal vocalizations in New World and Old World primate species, but rarely in apes. Our observations of antiphonal songs in gibbons indicate that gibbons not only unilaterally advertise information, but also interactively communicate with neighbors and family members through songs. Since gibbons are phylogenetically similar to humans, and turn-taking has an important role in human conversation, our research on gibbon communication may provide insight into the evolution of human language. (shrink)