Human microbiome research makes causal connections between entire microbial communities and a wide array of traits that range from physiological diseases to psychological states. To evaluate these causal claims, we first examine a well-known single-microbe causal explanation: of Helicobacter pylori causing ulcers. This apparently straightforward causal explanation is not so simple, however. It does not achieve a key explanatory standard in microbiology, of Koch’s postulates, which rely on manipulations of single-microorganism cultures to infer causal relationships to disease. When Koch’s postulates (...) are framed by an interventionist causal framework, it is clearer what the H. pylori explanation achieves and where its explanatory strengths lie. After assessing this ‘simple’, single-microbe case, we apply the interventionist framework to two key areas of microbiome research, in which obesity and mental health states are purportedly explained by microbiomes. Despite the experimental data available, interventionist criteria for explanation show that many of the causal claims generated by microbiome research are weak or misleading. We focus on the stability, specificity and proportionality of proposed microbiome causal explanations, and evaluate how effectively these dimensions of causal explanation are achieved in some promising avenues of research. We suggest some conceptual and explanatory strategies to improve how causal claims about microbiomes are made. (shrink)

Human microbiome research makes causal connections between entire microbial communities and a wide array of traits that range from physiological diseases to psychological states. To evaluate these causal claims, we first examine a well-known single-microbe causal explanation: of Helicobacter pylori causing ulcers. This apparently straightforward causal explanation is not so simple, however. It does not achieve a key explanatory standard in microbiology, of Koch’s postulates, which rely on manipulations of single-microorganism cultures to infer causal relationships to disease. When Koch’s postulates (...) are framed by an interventionist causal framework, it is clearer what the H. pylori explanation achieves and where its explanatory strengths lie. After assessing this ‘simple’, single-microbe case, we apply the interventionist framework to two key areas of microbiome research, in which obesity and mental health states are purportedly explained by microbiomes. Despite the experimental data available, interventionist criteria for explanation show that many of the causal claims generated by microbiome research are weak or misleading. We focus on the stability, specificity and proportionality of proposed microbiome causal explanations, and evaluate how effectively these dimensions of causal explanation are achieved in some promising avenues of research. We suggest some conceptual and explanatory strategies to improve how causal claims about microbiomes are made. (shrink)

Human microbiome research makes causal connections between entire microbial communities and a wide array of traits that range from physiological diseases to psychological states. To evaluate these causal claims, we first examine a well-known single-microbe causal explanation: of Helicobacter pylori causing ulcers. This apparently straightforward causal explanation is not so simple, however. It does not achieve a key explanatory standard in microbiology, of Koch’s postulates, which rely on manipulations of single-microorganism cultures to infer causal relationships to disease. When Koch’s postulates (...) are framed by an interventionist causal framework, it is clearer what the H. pylori explanation achieves and where its explanatory strengths lie. After assessing this ‘simple’, single-microbe case, we apply the interventionist framework to two key areas of microbiome research, in which obesity and mental health states are purportedly explained by microbiomes. Despite the experimental data available, interventionist criteria for explanation show that many of the causal claims generated by microbiome research are weak or misleading. We focus on the stability, specificity and proportionality of proposed microbiome causal explanations, and evaluate how effectively these dimensions of causal explanation are achieved in some promising avenues of research. We suggest some conceptual and explanatory strategies to improve how causal claims about microbiomes are made. (shrink)

Collaboration requires agents to coordinate their behavior on the fly, sometimes cooperating to solve a single task together and other times dividing it up into sub‐tasks to work on in parallel. Underlying the human ability to collaborate is theory‐of‐mind (ToM), the ability to infer the hidden mental states that drive others to act. Here, we develop Bayesian Delegation, a decentralized multi‐agent learning mechanism with these abilities. Bayesian Delegation enables agents to rapidly infer the hidden intentions of others by inverse planning. (...) We test Bayesian Delegation in a suite of multi‐agent Markov decision processes inspired by cooking problems. On these tasks, agents with Bayesian Delegation coordinate both their high‐level plans (e.g., what sub‐task they should work on) and their low‐level actions (e.g., avoiding getting in each other's way). When matched with partners that act using the same algorithm, Bayesian Delegation outperforms alternatives. Bayesian Delegation is also a capable ad hoc collaborator and successfully coordinates with other agent types even in the absence of prior experience. Finally, in a behavioral experiment, we show that Bayesian Delegation makes inferences similar to human observers about the intent of others. Together, these results argue for the centrality of ToM for successful decentralized multi‐agent collaboration. (shrink)

The intent of ethics is to establish a set of standards that will provide a framework to modify, regulate, and possibly enhance moral behaviour. Eleven focus groups were conducted with physicians from six culturally distinct countries to explore their perception of formalized, written ethical guidelines (i.e., codes of ethics, credos, value and mission statements) that attempt to direct their ethical practice. Six themes emerged from the data: lack of awareness, no impact, marginal impact, other codes or value statements supersede, personal (...) codes or values dictate, and ethical guidelines are useful. Overall, codes were valued only when they were congruent with existing personal morality. The findings suggest the need to re-evaluate the purpose, content, and delivery of codes for them to improve their function in promoting ethical conduct. (shrink)

BackgroundThere is increasing need for peer reviewers as the scientific literature grows. Formal education in biostatistics and research methodology during residency training is lacking. In this pilot study, we addressed these issues by evaluating a novel method of teaching residents about biostatistics and research methodology using peer review of standardized manuscripts. We hypothesized that mentored peer review would improve resident knowledge and perception of these concepts more than non-mentored peer review, while improving review quality.MethodsA partially blinded, randomized, controlled multi-center study (...) was performed. Seventy-eight neurology residents from nine US neurology programs were randomized to receive mentoring from a local faculty member or not. Within a year, residents reviewed a baseline manuscript and four subsequent manuscripts, all with introduced errors designed to teach fundamental review concepts. In the mentored group, mentors discussed completed reviews with residents. Primary outcome measure was change in knowledge score between pre- and post-tests, measuring epidemiology and biostatistics knowledge. Secondary outcome measures included level of confidence in the use and interpretation of statistical concepts before and after intervention, and RQI score for baseline and final manuscripts.ResultsSixty-four residents (82%) completed initial review with gradual decline in completion on subsequent reviews. Change in primary outcome, the difference between pre- and post-test knowledge scores, did not differ between mentored (−8.5%) and non-mentored (−13.9%) residents (p = 0.48). Significant differences in secondary outcomes (using 5-point Likert scale, 5 = strongly agree) included mentored residents reporting enhanced understanding of research methodology (3.69 vs 2.61; p = 0.001), understanding of manuscripts (3.73 vs 2.87; p = 0.006), and application of study results to clinical practice (3.65 vs 2.78; p = 0.005) compared to non-mentored residents. There was no difference between groups in level of interest in peer review (3.00 vs 3.09; p = 0.72) or the quality of manuscript review assessed by the Review Quality Instrument (RQI) (3.25 vs 3.06; p = 0.50).ConclusionsWe used mentored peer review of standardized manuscripts to teach biostatistics and research methodology and introduce the peer review process to residents. Though knowledge level did not change, mentored residents had enhanced perception in their abilities to understand research methodology and manuscripts and apply study results to clinical practice. (shrink)

Personality disorder symptomatology (PD-Sx) can result in personal distress and impaired interpersonal functioning, even in the absence of a clinical diagnosis, and is frequently comorbid with psychiatric disorders such as substance use, mood, and anxiety disorders; however, they often remain untreated, and are not taken into account in clinical studies. To investigate brain morphological correlates of PD-Sx, we measured subcortical volume and shape, and cortical thickness/surface area, based on structural magnetic resonance images. We investigated 37 subjects who reported PD-Sx exceeding (...) DSM-IV Axis-II screening thresholds, and 35 age, sex, and smoking status-matched control subjects. Subjects reporting PD-Sx were then grouped into symptom-based clusters: N = 20 into Cluster B (reporting Antisocial, Borderline, Histrionic, or Narcissistic PD-Sx) and N = 28 into Cluster C (reporting Obsessive–Compulsive, Avoidant, or Dependent PD-Sx); N = 11 subjects reported PD-Sx from both clusters, and none reported Cluster A (Paranoid, Schizoid, or Schizotypal) PD-Sx. Compared to control, Cluster C PD-Sx was associated with greater striatal surface area localized to the caudate tail, smaller ventral striatum volumes, and greater cortical thickness in right prefrontal cortex. Both Cluster B and C PD-Sx groups also showed trends toward greater posterior caudate volumes and orbitofrontal surface area anomalies, but these findings did not survive correction for multiple comparisons. The results point to morphological abnormalities that could contribute to Cluster C PD-Sx. In addition, the observations parallel those in substance use disorders, pointing to the importance of considering PD-Sx when interpreting findings in often-comorbid psychiatric disorders. (shrink)

This commentary focuses on the authors’ treatment of Koch’s postulates. It argues in favour of a modification of Koch’s postulates and their analysis in terms of necessary and sufficient conditions. This leads to a criticism of the authors’ treatment of the C. difficile case, and to query the need for the criteria of specificity and proportionality.

This commentary focuses on the authors’ treatment of Koch’s postulates. It argues in favour of a modification of Koch’s postulates and their analysis in terms of necessary and sufficient conditions. This leads to a criticism of the authors’ treatment of the C. difficile case, and to query the need for the criteria of specificity and proportionality.

1. What is Korean Philosophy? 2. What is Philosophy? : Philosophy as Axial Ideas, and Philosophy as Modern ideas 3. What are the distinctions of Korean Philosophy? 1. What is Korean Philosophy? What is Philosophy? It represents human, universal ideas. Does there exist Korean Philosophy that could represent the prevalent and universal ideas among Koreans, within the Korean regions? There are two popular meanings of Philosophy: a narrow meaning and a broad one. Korean Philosophy does not exist as philosophy within (...) the narrow meaning. Philosophy (philosophy = philia+sophia) means “love (philia) of wisdom (sophia)” in the narrow sense that appeared as a demotic term in ancient Greece, and it became a technical term afterward. In the broad sense of philosophy,there are Arabic, Indian, and Chinese Philosophy. They mainly declare their existence through their respective philosophical histories. What is Korean Philosophy? In the narrow definition of ancient Greece, Korean Philosophy first appeared in the Modern Age (1860 A.D.). But In the broad definition of Arabia, India, and China, Korean Philosophy first appeared in “Age of Three Kingdoms of Korea” (37 B.C. ~688 A.D.). Is there a distinct, Korean Philosophy? Korean Philosophy can be defined in two ways: by the philosophy of the Axial Idea and by the philosophy of modern ideas. There are three periods in the history of Korean Philosophy: Korean original, traditional, and modern philosophy. Is there a distinct, Korean Philosophy? The distinctions of the Philosophy native to Korea are based on: 1) contents of “Josunchendook” (Sanhaegyung) 2) terms of “Gojosun,” (Samgukyusa) 3) “Punglu” (Samguksagi) 4) “Chenbugyung” (Handangogi). In these texts are these concepts: 1) the ideas of human respect in “Josunchendook”, 2) the philosophy of the mutual, respectful relations in “Gojosun”, 3) the synthesis ideas from three doctrines - Confucianism, Taoism and Buddhism-in “Pungludo”, and 4) an integration of these three concepts (1 to 3) in“Chenbugyung”; their characteristic is state philosophy, and is seen as modern inter-subjectivity. The distinction of Korean traditional philosophy is one that contains thorough, synthetic ideas (e.g., Wonhyo's idea of one Buddhism that contains all Buddhist sects, Euichon's Chentaejong, Jinul's Jogaejong and so on). These ideas have achieved international renown due to their thoroughness and precision. All types of Korean, traditional philosophy have the trait of thoroughness, whether they stem from primarily Buddhist and Confucian thought. Korean modern philosophy includes the philosophical products (or thoughts) of seven Korean national societies of philosophy. Korean modern philosophy must study modern Korea society. It is changing the Candle spiritual Revolution.This Revolution claims not modern Rights of freedom, equality, and benevolence, but Rights to live all lives altogether. It is happening in the background of two fears: a fear of crazy ox and a fear of distrust society system. The Subject of candle Revolution is mass in the streets, networks, and homes. They have both sunin and democratic citizen minds. While candles fire in the streets, internets, and homes, Candle Revolution is continuing forever in Korean mind. (shrink)

Prescriptive rules guide human behavior across various domains of community life, including law, morality, and etiquette. What, specifically, are rules in the eyes of their subjects, i.e., those who are expected to abide by them? Over the last sixty years, theorists in the philosophy of law have offered a useful framework with which to consider this question. Some, following H. L. A. Hart, argue that a rule’s text at least sometimes suffices to determine whether the rule itself covers a case. (...) Others, in the spirit of Lon Fuller, believe that there is no way to understand a rule without invoking its purpose — the benevolent ends which it is meant to advance. In this paper we ask whether people associate rules with their textual formulation or their underlying purpose. We find that both text and purpose guide people’s reasoning about the scope of a rule. Overall, a rule’s text more strongly contributed to rule infraction decisions than did its purpose. The balance of these considerations, however, varied across experimental conditions: In conditions favoring a spontaneous judgment, rule interpretation was affected by moral purposes, whereas analytic conditions resulted in a greater adherence to textual interpretations. In sum, our findings suggest that the philosophical debate between textualism and purposivism partly reflects two broader approaches to normative reasoning that vary within and across individuals. Keywords: , the concept of law, rules, legal psychology, Hart, Fuller. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:Spirit Stones of China: The Ian and Susan Wilson Collection of Chinese Stones, Paintings, and Related Scholars' ObjectsGraham ParkesSpirit Stones of China: The Ian and Susan Wilson Collection of Chinese Stones, Paintings, and Related Scholars' Objects. Edited by Stephen Little. Chicago: The Art Institute of Chicago in association with University of California Press, 1999. Pp. 112.Let me introduce Spirit Stones of China: The Ian and Susan Wilson Collection (...) of Chinese Stones, Paintings, and Related Scholars' Objects (edited by Stephen Little) with this quotation:The purest essence of the energy of the heaven-earth world coalesces into rock. It emerges, bearing the soil. Its formations are wonderful and fantastic. Some with cavernous cliffs, revealing their interior; some with peaks and summits in sharp-edged layers.... Within the size of a fist can be assembled the beauty of a thousand cliffs. Rocks large enough to be set up in great courtyards, small enough to be set upon a stand. Like gazing upon the peaks of Song Shan, or facing the entire range of the Meng mountains; sitting quietly, your imagination purified.... The Sage [Confucius] once said, "the humane man loves mountains," and the love of stones has the same meaning. Thus, longevity through quietude is achieved through this love.This passage articulates the very different understanding of stone—as "essential energy" rather than mere matter—that underlies the traditional Chinese passion for rock collecting and appreciating, for which even the terms "petromania" and "litholatry" seem too weak. It comes from the preface to the earliest surviving Chinese manual on the topic, Du Wan's Stone Compendium of Cloudy Forest, compiled in the early twelfth century, and is quoted by Stephen Little in his erudite and informative introduction to this magnificent catalog for a unique collection of "spirit" or "strange stones" (guai shi) and other scholars' articles. This essay nicely complements and amplifies ideas set forth some fifteen years ago by John Hay, in his now classic introduction to the catalog Kernels of Energy, Bones of Earth: The Rock in Chinese Art (New York: China House Gallery, China Institute in America, 1985).Most cultures appear to begin with a natural reverence for stone in its natural state—one thinks of the Druids, the Indian tradition, the Polynesians, Native Americans, and Australian aboriginal culture—and many seem to retain that reverence as they develop. Indeed, when seen in a global perspective, the general lack of interest in (or respect for) rock in its unhewn state that characterizes the European and Anglo-American traditions seems idiosyncratic. But Chinese culture definitely has the longest and most enthusiastic tradition of collecting stones and arranging rocks in gardens: "strange stones" figure among articles of tribute offered to the mythical emperor Yu (mid-second millennium B.C.E.), and the emperor Wu Di (second century B.C.E.) is recorded as having had rocks arranged in the gardens of his palace. [End Page 306]Stephen Little's essay gives an eloquent account of the development of the practice of stone collecting in China, delineating its relationships with poetry and painting and other arts and practices, and containing numerous translations of passages from primary sources otherwise inaccessible to the non-reader of Chinese. Most of the rocks in the catalog are of the well-known Lingbi (sonorous) and Ying types, but other kinds are represented, too. The editor also supplies a context for appreciating the paintings, scrolls, and other articles from scholars' desks that are in the catalog: brush rests, inkstones, brush holders, and so forth. The sixty-six items from the collection are represented in excellent black-and-white photographs.The book is beautifully designed and produced—and is indeed a work of art in itself with its handsome, dark blue Chinese-style case. All in all, this a stylish and informative contribution to the growing literature on a philosophically fascinating topic. [End Page 307]Graham Parkes University of Hawai'iCopyright © 2001 University of Hawai'i Press... (shrink)

The title of this and proposed second volume presents the basic idea which unifies the wide variety of topics developed and investigated by the principal authors, major contributing authors, J. M. Dunn and Robert K. Meyer, and eleven other contributors. The other contributors are: J. R. Chidgey, J. A. Coffa, Dorthy L. Grover, Bas van Fraassen, H. Leblanc, Storrs McCall, A. Parks, G. Pottinger, R. Routley, A. Urquhart, and R. G. Wolf. From both the useful analytic table of contents and (...) from the section titles it is clear which contributing author has written each section. Chapter I, "The Pure Calculus of Entailment," suggests how logics of entailment are logics of relevance and necessity. When we explain why a large number of systems are investigated, it will be clear why we write of logics of entailment instead of the logic of entailment. The principal authors build a case in Chapter I, and elsewhere, that a genuinely valid formal inference, viz., a formal entailment, from a formula A to a formula B requires that A be relevant to B in addition to it being impossible that there be an interpretation making A true and B false. So, a claim that A entails B tells us, explicitly or implicitly, that A is relevant to B and that "if A then B" is necessarily true, i.e., A strictly implies B. Consequently since a logic of entailment presents allegedly unfalsifiable claims, i.e., theses, using entailment claims, a logic of entailment presents theses about relevance between antecedents and consequents and necessity. It should be noted that the systems of logic developed are for formal entailments; they may not be logics for material entailments such as: being a cube entails having six surfaces. (shrink)