What kinds of evidence reliably support predictions of effectiveness for health and social care interventions? There is increasing reliance, not only for health care policy and practice but also for more general social and economic policy deliberation, on evidence that comes from studies whose basic logic is that of JS Mill's method of difference. These include randomized controlled trials, case–control studies, cohort studies, and some uses of causal Bayes nets and counterfactual-licensing models like ones commonly developed in econometrics. The topic (...) of this paper is the 'external validity' of causal conclusions from these kinds of studies. We shall argue two claims. Claim, negative: external validity is the wrong idea; claim, positive: 'capacities' are almost always the right idea, if there is a right idea to be had. If we are right about these claims, it makes big problems for policy decisions. Many advice guides for grading policy predictions give top grades to a proposed policy if it has two good Mill's-method-of difference studies that support it. But if capacities are to serve as the conduit for support from a method-of-difference study to an effectiveness prediction, much more evidence, and much different in kind, is required. We will illustrate the complexities involved with the case of multisystemic therapy, an internationally adopted intervention to try to diminish antisocial behaviour in young people. (shrink)

In order to illustrate how terms of reference themselves, such as those announced by ‘professional ethics’, delimit and distort moral consideration I start with an extended discussion of how Just War Theory operates to do this; and go on to discuss ‘the power of naming’ with reference to the British attack on Iraq. Having thus situated my approach to the politics of professional ethics in a broader political context I offer a critique of ‘professional’ ethics in terms of what is (...) left out of the moral picture and how in particular political considerations are sidelined. Finally I argue that ‘codes’ of professional ethics are especially insidious. (shrink)

This was scanned from the 1909 edition and mechanically checked against a commercial copy of the text from CDROM. Differences were corrected against the paper edition. The text itself is thus a highly accurate rendition. The footnotes were entered manually.

Thomas S. Kuhn's classic book is now available with a new index.

Evidence-based medicine (EBM) has thus far failed to adequately account for the appropriate incorporation of other potential warrants for medical decision making into clinical practice. In particular, EBM has struggled with the value and integration of other kinds of medical knowledge, such as those derived from clinical experience or based on pathophysiologic rationale. The general priority given to empirical evidence derived from clinical research in all EBM approaches is not epistemically tenable. A casuistic alternative to EBM approaches recognizes that five (...) distinct topics, 1) empirical evidence, 2) experiential evidence, 3) pathophysiologic rationale, 4) patient goals and values, and 5) system features are potentially relevant to any clinical decision. No single topic has a general priority over any other and the relative importance of a topic will depend upon the circumstances of the particular case. The skilled clinician must weigh these potentially conflicting evidentiary and non-evidentiary warrants for action, employing both practical and theoretical reasoning, in order to arrive at the best choice for an individual patient. (shrink)

Medicine involves specific practical expertise as well as more general context-independent medical knowledge. This raises the question, what is the nature of the expertise involved? Is there a model of clinical judgement or understanding that can accommodate both elements? This paper begins with a summary of a published account of the kinds of situation-specific skill found in anaesthesia. It authors claim that such skills are often neglected because of a prejudice in favour of the ‘technical rationality’ exemplified in evidence-based medicine (...) but they do not themselves offer a general account of the relation of practical expertise and general medical knowledge. The philosopher Hubert Dreyfus provides one model of the relation of general knowledge to situation-specific skilled coping. He claims that the former logically depends on the latter and provides two arguments, which I articulate in the second section, for this. But he mars those arguments by building in the further assumption that such situation-specific responses must be understood as concept-free and thus mindless. That assumption is held in place by three arguments all of which I criticize in the next section to give a unified account of clinical judgement as both practical and conceptually structured and thus justified in the face of a prejudice in favour of ‘technical rationality’. (shrink)

While evidence-based medicine (EBM) is often accused on relying on a paradigm of 'absolute truth', it is in fact highly consistent with Karl Popper's criterion of demarcation through falsification. Even more relevant, the first three steps of the EBM process are closely patterned on Popper's evolutionary approach of objective knowledge: (1) recognition of a problem; (2) generation of solutions; and (3) selection of the best solution. This places the step 1 of the EBM process (building an answerable question) in a (...) pivotal position for the understanding of the whole process, and underscores a few aspects which are often overlooked in EBM courses. First in this step internal evidence (including personal expertise) must be appraised and integrated in the problem. Second, issues of applicability of the possible solution should be anticipated. Third, and possibly more important, the goal of the intervention should be set at this stage (typically by choosing the outcome in a PICO question). Depending whether or not goals depend on the goals of others, and whether they concern others' voluntary behaviour, goals may be classified as self-serving, moral, altruistic or moralistic. Thus, delicate ethical questions must be addressed at this stage, which means that patient preferences and values must be carefully sought, so that empathy, counselling and narrative medicine must be mastered to be able to formulate correctly an answerable question. The need to modify the current description of the EBM process to increase the recognition of implicit assumptions and increase the consistency of this model is discussed. (shrink)

Homeopathic medications are used by millions, and hundreds of millions of dollars are spent on these remedies in the USA alone. In the UK, the NHS covers homeopathic treatments. Nonetheless, homeopathy is held in considerable disrepute by much of the medical and scientific community.Many proponents of homeopathy are well aware of these criticisms but remain unimpressed. The differences of opinion run deep, and the debate seems deadlocked. We aim to shed some light on this situation. We briefly recap some of (...) the major arguments on each side, but we try to go further by making explicit an underlying philosophical presupposition. In particular, we will claim that there is an important principle, which has ancient roots going back at least to Occam, some version of which constrains all empirical reasoning.We call this constraint the simplicity principle.We argue that this is not something specific to a scientific paradigm, but that, all of us, including proponents of homeopathy, are themselves deeply committed to the simplicity principle. However, once the simplicity principle is made explicit and applied to homeopathy, allegiance to homeopathy is clearly seen as irrational. The point is not merely the lack of clinical trials supporting homeopathy; rather, belief in the efficacy of homeopathy leaves a mountain of unexplained mysteries, and thereby flies in the face of the simplicity rule that guides the homeopaths’ own reasoning and arguments. If nothing else, we hope that defenders of homeopathy will gain a greater understanding of why critics are so deeply reluctant to accept the efficacy of homeopathic interventions – and that this reluctance is not mere stubbornness or artificial allegiance to western medicine. Finally, we also hope thereby to illustrate the usefulness of philosophy in unearthing presuppositions in seemingly deadlocked debates. (shrink)

The author responds to Professor Kottow's criticisms, explaining numerous errors and misconceptions.

Different beliefs about the nature and justification of bioethics may reflect different assumptions in moral epistemology. Two alternative views (put forward by David Seedhouse and Michael H Kottow) are analysed and some speculative conclusions formed. The foundational questions raised here are by no means settled and deserve further attention.

Moss is right to state that management theory needs to address its epistemological foundations by considering questions in epistemology and the philosophy of science. Whether management theory needs Popper is a more tricky question. It is not clear that all theories should be falsifiable in Popper’s terms. His proposed methodology for social scientific research is inherently conservative and threatens to inhibit intellectual and social progress. But Popper’s philosophical realism and rationalism need to be preserved. Coherentism and associated forms of anti-rationalism (...) (including postmodernism and relativism) threaten to provide a rationale for the worst excesses of management theory. Indeed, the poverty of contemporary management theory is a symptom of a broader intellectual malaise: debate is increasingly characterised by the exchange of persuasive rhetoric, making it difficult to hold those in positions of power accountable for rationally justifying the positions they espouse. (shrink)

Moss is right to state that management theory needs to address its epistemological foundations by considering questions in epistemology and the philosophy of science. Whether management theory needs Popper is a more tricky question. It is not clear that all theories should be falsifiable in Popper’s terms. His proposed methodology for social scientific research is inherently conservative and threatens to inhibit intellectual and social progress. But Popper’s philosophical realism and rationalism need to be preserved. Coherentism and associated forms of anti-rationalism (...) (including postmodernism and relativism) threaten to provide a rationale for the worst excesses of management theory. Indeed, the poverty of contemporary management theory is a symptom of a broader intellectual malaise: debate is increasingly characterised by the exchange of persuasive rhetoric, making it difficult to hold those in positions of power accountable for rationally justifying the positions they espouse. (shrink)

A number of recent publications by the philosopher David Seedhouse are discussed. Although medicine is an eminently ethical enterprise, the technical and ethical aspects of health care practices can be distinguished, therefore justifying the existence of medical ethics and its teaching as a specific part of every medical curriculum. The goal of teaching medical ethics is to make health care practitioners aware of the essential ethical aspects of their work. Furthermore, the contention that rational bioethics is a fruitless enterprise because (...) it analyses non-rational social events seems neither theoretically tenable nor to be borne out by actual practice. Medical ethics in particular and bioethics in general, constitute a field of expertise that must make itself understandable and convincing to relevant audiences in health care. (shrink)

This brief reply gives a few references and clarifies some points in order to emphasize that a number of Professor Seedhouse's assertions are debatable and that his criticism of slovenly scholarship and his unbridled ad hominem argumentation are out of place and easily refuted.