中国逻辑史视野下的先秦易学与名辩学

19世纪以来的中国逻辑史研究,比照西方逻辑,仅仅将先秦的名辩学看成是中国逻辑史的主要部分。其间虽有对《周易》的涉及,但也是浅尝辄止。本文从《周易》经、传产生的年代,特别是《周易》经、传所蕴涵的逻辑内容与先秦名辩逻辑的代表人物孔子、惠施、邓析等人的思想对比,说明先秦易学逻辑对名辩逻辑产生了深刻的影响。得出《周易》的经、传发轫了中国古代逻辑中的推类理论,而名辩学尤其是墨家辩学的推类理论则是对自《周易》以来的推类逻辑传统的总结和提高的结论。     

Advertisement for the ontology for medicine

The ontology of medicine—the question of whether disease entities are real or not—is an underdeveloped area of philosophical inquiry. This essay explains the primary question at issue in medical ontology, discusses why answering this question is important from both a philosophical and a practical perspective, and argues that the problem of medical ontology is unique, i.e., distinct, from the ontological problems raised by other sciences and therefore requires its own analysis.     

Evaluation of evidence for sufficiency, for necessity, and for necessity-and-sufficiency

We report two experiments with 120 undergraduate subjects. The tasks presented clearly articulated hypotheses concerning necessity, sufficiency, and necessity-and-sufficiency, together with possible combinations of treatment conditions, and required subjects to judge whether, according to the hypotheses, the relevant outcomes will occur, will not occur, or might occur. The patterns of responses reveal how subjects understand the extensions of the concepts, i.e. what each hypothesis permits, requires, and excludes. Only necessity-and-sufficiency hypotheses generally led to logically adequate responses, and the most typical error for both necessity hypotheses and sufficiency hypotheses was to treat them as extensionally equivalent to necessity-and-sufficiency. This error tendency was more evident for necessity than for sufficiency hypotheses. Further, although responses to both necessity hypotheses and sufficiency hypotheses were affected by the complexity of the hypothesized conditions, responses to necessity-and-sufficiency hypotheses were not. We argue that the results are not a function of a response bias but reflect differences in the way the hypotheses are understood. Implications for the causal attribution literature are discussed.     

Compassion for one reduces punishment for another

The ability of compassion felt toward one person to reduce punishment directed at another was examined. The use of a staged interaction in which one individual cheats to earn higher compensation than others resulted in heightened third-party punishment being directed at the cheater. However, among participants who were induced to feel compassion toward a separate individual, punishment of the cheater disappeared even though the cheater clearly intended to cheat and showed no remorse for doing so. Moreover, additional analyses revealed that the reduction in punishment was directly mediated by the amount of compassion participants experienced toward the separate individual.