Since it was presented in 1963, Chisholm’s paradox has attracted constant attention in the deontic logic literature, but without the emergence of any definitive solution. We claim this is due to its having no single solution. The paradox actually presents many challenges to the formalization of deontic statements, including (1) context sensitivity of unconditional oughts, (2) formalizing conditional oughts, and (3) distinguishing generic from nongeneric oughts. Using the practical interpretation of ‘ought’ as a guideline, we propose a linguistically motivated logical (...) solution to each of these problems, and explain the relation of the solution to the problem of contrary-to-duty obligations. (shrink)

Context has emerged as a central concept in a variety of contemporary approaches to reasoning. The conference at which the papers in this volume were presented, CONTEXT 2001, was the third international, interdisciplinary conference on the topic of context, and was held in Dundee, Scotland on July 27-30, 2001.

Following the pioneer work of Bruno De Finetti [12], conditional probability spaces (allowing for conditioning with events of measure zero) have been studied since (at least) the 1950's. Perhaps the most salient axiomatizations are Karl Popper's in [31], and Alfred Renyi's in [33]. Nonstandard probability spaces [34] are a well know alternative to this approach. Vann McGee proposed in [30] a result relating both approaches by showing that the standard values of infinitesimal probability functions are representable as Popper functions, and (...) that every Popper function is representable in terms of the standard real values of some infinitesimal measure. Our main goal in this article is to study the constraints on (qualitative and probabilistic) change imposed by an extended version of McGee's result. We focus on an extension capable of allowing for iterated changes of view. Such extension, we argue, seems to be needed in almost all considered applications. Since most of the available axiomatizations stipulate (definitionally) important constraints on iterated change, we propose a non-questionbegging framework, Iterative Probability Systems (IPS) and we show that every Popper function can be regarded as a Bayesian IPS. A generalized version of McGee's result is then proved and several of its consequences considered. In particular we note that our proof requires the imposition of Cumulativity, i.e. the principle that a proposition that is accepted at any stage of an iterative process of acceptance will continue to be accepted at any later stage. The plausibility and range of applicability of Cumulativity is then studied. In particular we appeal to a method for defining belief from conditional probability (first proposed in [42] and then slightly modified in [6] and [3]) in order to characterize the notion of qualitative change induced by Cumulative models of probability kinematics. The resulting cumulative notion is then compared with existing axiomatizations of belief change and probabilistic supposition. We also consider applications in the probabilistic accounts of conditionals [1] and [30]. (shrink)

Explicit axioms relating ◊ϕand □ϕ appear to be needed if ◊ is taken to be primitive. We prove that such axioms are in fact indispensable.

Deontic logic, as traditionally conceived, provides only a deductive theory that constrains the states or possible worlds within which an agent should try to remain.

An exploration of subsequent consent as a sufficient condition of justified paternalistic interference reveals that there are other factors, beyond consent, which are the salient criteria of justification. It is argued that these criteria are educational in character, and so it is on educational grounds that we must judge particular cases of paternalism. Examination of the issue of the upbringing of children suggests that significant progress in our understanding of the problems inherent in paternalistic decision-making can be made through the (...) development of educational theory. (shrink)

An exploration of subsequent consent as a sufficient condition of justified paternalistic interference reveals that there are other factors, beyond consent, which are the salient criteria of justification. It is argued that these criteria are educational in character, and so it is on educational grounds that we must judge particular cases of paternalism. Examination of the issue of the upbringing of children suggests that significant progress in our understanding of the problems inherent in paternalistic decision-making can be made through the (...) development of educational theory. (shrink)

The essays in philosophical logic collected in this volume are dedicated to Henry S. Leonard who was one of the first American philosophers to urge the application of modern logic to non-mathematical areas. Leonard also inspired the development of certain areas of contemporary philosophical logic discussed in some of the papers of this volume. This is especially clear in the case of free, or presupposition free, logics which Leonard's early work on a logic of existence inspired. In one essay of (...) this volume Bas C. Van Frassen further develops his work on the semantics of free logic. In another, Milton Fisk relates free logic to modal logic, suggesting a new semantics of strength to deal with various problems in the area and in a third essay, Karel Lambert relates free logic to certain logical puzzles about quantum theory. Leonard was also one of the first to entertain the idea of and discuss a logic of questions and an erotetic logic or logic of interests. The volume contains essays on these topics by Nuel D. Belnap and David Harrah. Leonard's interest in modal logic is reflected in Fisk's article as well as in an article by Richmond Thomason on modal logic and metaphysics. His interest in epistemic logic is seen in an essay on the logic of belief by Jon Vickers and an essay by Hintikka applying the logic of belief and knowledge to problems about the ontological argument. In addition to these essays, there are five others of high quality on diverse topics: R. M. Martin on intentions, Wilfrid Sellars on the metaphysics of the person, R. M. Chisholm on agency, Frederick Fitch on combinatory logic and negative numbers, and H. E. Hendry and G. J. Massey on Sheffer functions. This is a worthy memorial to a quietly influential American philosopher.--R. H. K. (shrink)

tic sequenzen-kalkul of Gentzen, into rules for PCc, the classical sequenzenkalkul. We shall limit ourselves here to sequenzen or turnstile statements of the form A„A„..., A„ I- B, where A„A„..., A„(n ~ 0), and B are wffs consisting of propositional variables, zero or more of the connectives '5', "v', ' ', ')', and '=', and zero or more parentheses. One can pass from PCi to PCc by amending the intelim rules for ' a result of long standing, or by amending (...) the intelim rules for either one of.. (shrink)

Abstract Context: Established in 1997, Summa Health System’s Medical Ethics Committee (EC) serves as an educational, supportive, and consultative resource to patients/families and providers, and serves to analyze, clarify, and ameliorate dilemmas in clinical care. In 2009 the EC conducted its 100th consult. In 2002 a Palliative Care Consult Service (PCCS) was established to provide supportive services for patients/families facing advanced illness; enhance clinical decision-making during crisis; and improve pain/symptom management. How these services affect one another has thus far been (...) unclear. Objectives: This study describes EC consults: types, reasons, recommendations and utilization, and investigates the impact the PCCS may have on EC consult requests or recommendations. Methods: Retrospective reviews of 100 EC records explored trends and changes in types of consults, reasons for consults, and EC recommendations and utilization. Results: There were 50 EC consults each in the 6 years pre- and post-PCCS. Differences found include: (1) a decrease in number of reasons for consult requests (133–62); (2) changes in top two reasons for EC consult requests from ‘Family opposed to withdrawing life-sustaining treatment (LST)’ and ‘Patient capacity in question’ to ‘Futility’ and ‘Physician opposed to providing LST’; (3) changes in top two recommendations given by the EC from ‘Emotional Support for Patient/Family’ and ‘Initiate DNR Order’ to ‘Comfort Care’ and ‘Withdraw Treatment.’ Overall, 88% of recommendations were followed. Conclusion: PCCS availability and growth throughout the hospital may have influenced EC consult requests. EC consults regarding family opposition to withdrawing LST and EC recommendations for patient/family support declined. Content Type Journal Article Pages 1-16 DOI 10.1007/s10730-011-9170-9 Authors Jessica Richmond Moeller, Department of Psychiatry and Behavioral Sciences, Akron General Medical Center, 400 Wabash Ave, Akron, OH 44307, USA Teresa H. Albanese, Health Services Research and Education Institute, Summa Health System and Northeast Ohio Medical University, 55 Arch St., Suite 1A, Akron, OH 44304, USA Kimberly Garchar, Kent State University, 6000 Frank Ave., N.W, North Canton, OH 44720, USA Julie M. Aultman, Department of Family and Community Medicine, Northeast Ohio Medical University, P.O. Box 95, Rootstown, OH 44272, USA Steven Radwany, Palliative Care and Hospice Services, Summa Health System and Northeast Ohio Medical University, 55 Arch St., Suite 1A, Akron, OH 44304, USA Dean Frate, Internal Medicine, Palliative Care and Hospice Services, Summa Health System and Northeast Ohio Medical University, 55 Arch St., Suite 1A, Akron, OH 44304, USA Journal HEC Forum Online ISSN 1572-8498 Print ISSN 0956-2737. (shrink)

Might time be multi‐dimensional? In exploring this question, this paper uses a thought‐experiment about dimensionality, H. G. Wells' ‘The Plattner Story’. Plattner has his left and right sides transposed after a trip through a fourth spatial dimension, a change with independent empirical consequences. This example is then generalised to reversals of the directions of time and entropy. Finally, this thought‐experiment is related to relativistic theories of time and the possibility of preserving causality in a temporally multi‐dimensional framework.

There is a common (although not universal) claim among historians and philosophers that Copernican theory predicted the phases of Venus. This claim ignores a prominant feature of the writings of, among others, Copernicus, Galileo and Kepler-the possibility that Venus might be self illuminating or translucent. I propose that such over-simplifications of the history of science emerges from "psychological predictivism", the tendency to infer from "E is good evidence for H" to "H predicts E." If this explanation is correct, then in (...) cases where evidence is less blatant the history of science (and philosophies of science that rely on it) has probably been seriously distorted in a predictivist direction. (shrink)

H. G. Wells’ Time Traveller inhabits uniform Newtonian time. Where relativistic/quantum travelers into the past follow spacetime curvatures, past-bound Wellsians must reverse their direction of travel relative to absolute time. William Grey and Robin Le Poidevin claim reversing Wellsians must overlap with themselves or fade away piecemeal like the Cheshire Cat. Self-overlap is physically impossible but ‘Cheshire Cat’ fades destroy Wellsians’ causal continuity and breed bizarre fusions of traveler-stages with opposed time-directions. However, Wellsians who rotate in higher-dimensional space can reverse (...) temporal direction without self-overlap, Cheshire Cats or mereological monstrosities. Alas, hyper-rotation in Newtonian space poses dynamic and biological problems,. Controllable and survivable Wellsian travel needs topologically-variable spaces. Newtonian space, not Newtonian time, is Wellsians’ real enemy. (shrink)

In 1853, the young Thomas Henry Huxley published a long review of German cell theory in which he roundly criticized the basic tenets of the Schleiden-Schwann model of the cell. Although historians of cytology have dismissed Huxley's criticism as based on an erroneous interpretation of cell physiology, the review is better understood as a contribution to embryology. "The Cell-theory" presents Huxley's "epigenetic" interpretation of histological organization emerging from changes in the protoplasm to replace the "preformationist" cell theory of Schleiden and (...) Schwann (as modified by Albert von Kölliker), which posited the nucleus as the seat of organic vitality. Huxley's views influenced a number of British biologists, who continued to oppose German cell theory well into the twentieth century. Yet Huxley was pivotal in introducing the new German program of "scientific zoology" to Britain in the early 1850s, championing its empiricist methodology as a means to enact broad disciplinary and institutional reforms in British natural history. (shrink)