The language of manuals may be used to discuss inference in measurement in a general experimental context. Specializing to the context of the frame manual for Hilbert space, this inference leads to state dominance of the inferred state from partial measurements; this in turn, by Sakai's theorem, determines observables which are described by positive operator-valued measures. Symmetries are then introduced, showing that systems of covariance, rather than systems of imprimitivity, are natural objects to study in quantum mechanics. Experiments measuring different (...) polarization components simultaneously are reexamined in this language. Finally, implications of the Naimark extension theorem for the manual approach are investigated. (shrink)

The encounter between Socrates and Thrasymachus in Republic I is notoriously baffling. Most of what is said seems straightforward, and the issues at stake are ones of common concern, but the argument remains elusive. The purpose of this paper is to investigate the nature and grounds of this elusiveness, and to show that some of it can be dispelled by a sufficiently free-ranging exegesis that bears in mind the general character of Plato’s writing.

People’s concept of free will is often assumed to be incompatible with the deterministic, scientific model of the universe. Indeed, many scholars treat the folk concept of free will as assuming a special form of nondeterministic causation, possibly the notion of uncaused causes. However, little work to date has directly probed individuals’ beliefs about what it means to have free will. The present studies sought to reconstruct this folk concept of free will by asking people to define the concept (Study (...) 1) and by confronting them with a neuroscientific claim that free will is an illusion (Study 2), which invited them to either reconcile or contrast free will with determinism. The results suggest that the core of people’s concept of free will is a choice that fulfills one’s desires and is free from internal or external constraints. No evidence was found for metaphysical assumptions about dualism or indeterminism. (shrink)

Of the platonic theory that four qualities make up the whole of virtue. I show that aristotle's repudiation of this scheme is more apparent than real.

Aim: To improve clinical and ethical understanding of patient preferences for information and involvement in decision making.Objectives: To develop and evaluate a clinical tool to elicit these preferences and to consider the ethical issues raised.Design: A before and after study.Setting: Three UK hospices.Participants: Patients with advanced life-threatening illnesses and their doctors.Intervention: Questionnaire on information and decision-making preferences.Main outcome measures: Patient-based outcome measures were satisfaction with the amount of information given, with the way information was given, with family or carer information, (...) and confidence about future decision making. Doctor-based outcome measures were confidence in matching information to patient preference, matching family or carer communication to patient preference, knowing patient preferences and matching future decision making with patient preference.Results: Of 336 admissions, 101 patients completed the study . Patient satisfaction with the way information was given and family communication improved after introduction of the tool. Doctor confidence improved across all outcome measures .Conclusions: Patient satisfaction and doctor confidence were improved by administering the questionnaire, but complex ethical issues were raised by implementing and applying this research. The balance of ethical considerations were changed by advanced life-threatening illness, because there is increased risk of harm through delivery of information discordant with the patient’s own preferences. The importance of truly understanding patient preferences towards the end of life is highlighted by this study. (shrink)

, WOKING PREFATORY NOTE THIS essay is an attempt to follow critically the development of Kants metaphysical thought with special reference to the concept of God ...