I explore the reduction of thermodynamics to statistical mechanics by treating the former as a control theory: a theory of which transitions between states can be induced on a system by means of operations from a fixed list. I recover the results of standard thermodynamics in this framework on the assumption that the available operations do not include measurements which affect subsequent choices of operations. I then relax this assumption and use the framework to consider the vexed questions of (...) Maxwell's demon and Landauer's principle. Throughout I assume rather than prove the basic irreversibility features of statistical mechanics, taking care to distinguish them from the conceptually distinct assumptions of thermodynamics proper. (shrink)

A theory is presented to explain how accurate, single-joint movements are controlled. The theory applies to movements across different distances, with different inertial loads, toward targets of different widths over a wide range of experimentally manipulated velocities. The theory is based on three propositions. (1) Movements are planned according to “strategies” of which there are at least two: a speed-insensitive (SI) and a speed-sensitive (SS) one. (2) These strategies can be equated with sets of rules for performing diverse movement tasks. (...) The choice between SI and SS depends on whether movement speed and/or movement time (and hence appropriate muscle forces) must be constrained to meet task requirements. (3) The electromyogram can be interpreted as a low-pass filtered version of the controlling signal to the motoneuron pools. This controlling signal can be modelled as a rectangular excitation pulse in which modulation occurs in either pulse amplitude or pulse width. Movements to different distances and with loads are controlled by the SI strategy, which modulates pulse width. Movements in which speed must be explicitly regulated are controlled by the SS strategy, which modulates pulse amplitude. The distinction between the two movement strategies reconciles many apparent conflicts in the motor control literature. (shrink)

Imagination has recently attracted considerable attention from epistemologists and is recognized as a source of belief and even knowledge. One remarkable feature of imagination is that it is often and typically agentive: agents decide to imagine. In cases in which imagination results in a belief, the agentiveness of imagination may be taken to give rise to indirect doxastic control and epistemic responsibility. This observation calls for a proper understanding of agentive imagination. In particular, it calls for the development of (...) a semantics of imagination ascriptions. In the present paper an earlier suggestion by Ilkka Niiniluoto for a logic of imagination is considered. This proposal does not capture the agentive nature of imagination, and an alternative semantics is suggested. The new semantics combines the modal logic of agency with the neighbourhood semantics from alethic modal logic. (shrink)

This book brings cutting edge neuroscience and psychology into dialogue with philosophical reflection to illuminate the loss of control experienced by addicts, and thereby cast light on ordinary agency and the way in which it sometimes goes wrong.

According to “voluntarists,” voluntary control is a necessary precondition on being blameworthy. According to “non-voluntarists,” it isn’t. I argue here that we ought to take seriously a type of voluntary control that both camps have tended to overlook. In addition to “direct” control over our behavior, and “indirect” control over some of the consequences of our behavior, we also possess “constitutive” control: the capacity to govern some of our attitudes and character traits by making choices (...) about what to do that constitute those attitudes and traits. Taking this sort of control seriously, I argue, ultimately tips the scale towards voluntarism. First, I address a non-voluntarist case in which an agent is putatively made blameworthy by the reasons for which she acts, even though the particular reasons for which she acts aren’t up to her. I argue that this case looks compelling only if we overlook constitutive control, and thereby miss how the agent’s motivating reasons are under her voluntary control even though non-voluntarists think they are not. I then use the notion of constitutive control to diffuse some of the best putative counterexamples to voluntarism: cases in which subjects are blameworthy either for caring inadequately about others or for wishing them ill. (shrink)

The models of internal self-control that have recently been proposed by behavioral economists do not depict motivational interaction that occurs while temptation is present. Those models that include willpower at all either envision a faculty with a motivation (“strength”) different from the motives that are weighed in the marketplace of choice, or rely on incompatible goals among diverse brain centers. Both assumptions are questionable, but these models’ biggest problem is that they do not let resolutions withstand re-examination while being (...) challenged by impulsive alternatives. The economists’ models all attempt to make a single equilibrium preference predictable from a person’s prior incentives. This was the original purpose of these models’ hyperboloid (“β–δ”) delay discount functions, which have been widely justified by the assumption that a person’s intertemporal inconsistency (impulsiveness) can be accounted for by the arousal of appetite for visceral rewards. Although arousal is clearly a factor in some cases of intertemporal inconsistency, it cannot be blamed for others, and furthermore does not necessarily imply hyperboloid discounting. The inadequacy of β–δ functions is particularly evident in models of internal self-control. I have reviewed several of these models, and have argued for a return to pure hyperbolic discount function as originally proposed, the relatively high tails of which can motivate a recursive process of self-prediction and thereby the formation of self-enforcing intertemporal contracts. Such a process does not require a separately motivated faculty of will, or incompatible goals among brain centers; but it also does not permit the prediction of unique preferences from prior incentives. (shrink)

Tom Dougherty argues that culpably deceiving another person into sex is seriously wrong no matter what the content about which she is deceived. We argue that his explanation of why deception invalidates consent has extremely implausible implications. Though we reject Dougherty’s explanation, we defend his verdict about deception and consent to sex. We argue that he goes awry by conflating the disclosure requirement for consent and the understanding requirement. When these are distinguished, we can identify how deceptive disclosure invalidates consent. (...) This alternative explanation also allows for a response to Neil Manson’s recent criticisms of Dougherty’s argument. (shrink)

The experience of causation is a pervasive product of the human mind. Moreover, the experience of causing an event alters subjective time: actions are perceived as temporally shifted towards their effects [Haggard, P., Clark, S., & Kalogeras, J.. Voluntary action and conscious awareness. Nature Neuroscience, 5, 382-385]. This temporal shift depends partly on advance prediction of the effects of action, and partly on inferential "postdictive" explanations of sensory effects of action. We investigated whether a single factor of statistical contingency could (...) explain both these aspects of causal experience. We studied the time at which people perceived a simple manual action to occur, when statistical contingency indicated a causal relation between action and effect, and when no such relation was indicated. Both predictive and inferential "postdictive" shifts in the time of action depended on strong contingency between action and effect. The experience of agency involves a process of causal learning based on statistical contingency. (shrink)

The mathematical dynamic model of oxidative phosphorylation in muscle mitochondria developed previously was used to calculate the flux control coefficients of particular steps of this process in isolated mitochondria at different amounts of hexokinase and oxygen concentrations. The pattern of control was completely different under different conditions. For normoxic concentration, the main controlling steps in state 4, state 3.5 and state 3 were proton leak, ATP usage (hexokinase) and complex III, respectively. The pattern of control in state (...) 4 was not changed at hypoxic oxygen concentration, while in state 3.5 and state 3 much of the control was shifted from other steps to cytochrome oxidase. The implications of the theoretical results obtained for the regulation of oxidative phosphorylation in intact muscle are discussed. (shrink)

This work investigates the finite-time control problem for a nonlinear four-tank cross-coupled liquid level system by the port-controlled Hamiltonian model. A fixed-free methodology is exhibited which can be used to simplify the controller design procedure. To get an adjustable convergent gain of the finite-time control, a feasible technique named damping normalization is proposed. A novel parameter autotuning algorithm is given to clarify the principle of choosing parameters of the PCH method. Furthermore, a finite-time controller is designed by a (...) state-error desired Hamiltonian function, and the relationship between the settling time and a parameter is given, which can be applied in practical engineering easily to adjust the settling time according to the industrial need. Finally, simulation and experimental results verify the effectiveness of the proposed algorithm. (shrink)

What is self-control and how does the concept of self-control relate to the notion of will-power? A widespread philosophical opinion has been that the notion of will-power does not add anything beyond what can be said using other motivational notions, such as strength of desire and intention. One exception is Richard Holton who, inspired by recent research in social psychology, has argued that will-power is a separate faculty needed for persisting in one's resolutions, what he calls 'strength of (...) will'. However, he distinguishes strength of will from self-control. In this paper I argue that will-power is essential also to a certain form of self-control. I support this claim by arguments showing that the traditional philosophical accounts of self-control run into difficulties because they pay insufficient attention to will-power as an independent source of motivation. (shrink)

The ‘mineness’ of thoughts has often been accepted as indubitable in philosophy. However, the symptom of thought insertion in schizophrenia seems to be an empirical counterexample to the dictum that every introspected thought is one's own. We present a thorough conceptual analysis of mineness of thought, distinguishing between ownership and authorship . We argue that it is indeed a conceptual truth that introspected thoughts are owned by the introspector. However, there are everyday and pathological cases of thoughts, for which we (...) do not ascribe authorship to ourselves. To explain inserted thoughts, however, we need an additional factor which is constituted by the lack of control over inserted thoughts . We present a review of empirical data on thought control and thought insertion in the light of the conceptual analysis. We conclude with a summary of the most important future direction of research. (shrink)

La apatía con la que el hombre observa el accionar de los administradores públicos es una de las razones por las que muchos gobernantes consideran que acceden al poder para desarrollar proyectos personales y no para cumplir con el mandato del pueblo. En general, el argentino tiene la tendencia a "de..

The conscious feeling of exercising ‘free-will’ is fundamental to our sense of self. However, in some psychopathological conditions actions may be experienced as involuntary or unwilled. We have used suggestion in hypnosis to create the experience of involuntariness in normal participants. We compared a voluntary finger movement, a passive movement and a voluntary movement suggested by hypnosis to be ‘involuntary.’ Hypnosis itself had no effect on the subjective experience of voluntariness associated with willed movements and passive movements or on time (...) estimations of their occurrence. However, subjective time estimates of a hypnotically-suggested, ‘involuntary’ finger movement were more similar to those for passive movements than for voluntary movements. The experience of anomalous control is qualitatively and quantitatively different from the normal conscious experience of a similar act produced intentionally. The experience of anomalous control may be produced either by pathology, or, in our case, by suggestion. (shrink)

The antisaccade task provides a model paradigm that sets the inhibition of a reflexively driven behaviour against the volitional control of a goal-directed behaviour. The stability and adaptability of antisaccade performance was investigated in 23 neurologically healthy individuals. Behaviour and brain function were measured using functional magnetic resonance imaging (fMRI) prior to and immediately following two weeks of daily antisaccade training. Participants performed antisaccade trials faster with no change in directional error rate following two weeks of training; however this (...) increased speed came at the cost of the spatial accuracy of the saccade (gain) which became more hypometric following training. Training on the antisaccade task resulted in increases in fMRI activity in the fronto-basal ganglia-parietal-cerebellar ocular motor network. Following training, antisaccade latency was positively associated with fMRI activity in the frontal and supplementary eye fields, anterior cingulate and intraparietal sulcus; antisaccade gain was negatively associated with fMRI activity in supplementary eye fields, anterior cingulate, intraparietal sulcus and cerebellar vermis. In sum, the results suggest that following training, larger antisaccade latency is associated with larger activity in fronto-parietal-cerebellar ocular motor regions, and smaller antisaccade gain is associated with larger activity in fronto-parietal ocular motor regions. (shrink)

Bovine tuberculosis is the most economically important animal health policy issue in Britain. The problem of what to do about badgers has plagued successive governments since a dead badger was discovered with bovine TB in 1971. Successive Labour governments oversaw the Randomised Badger Culling Trial from 1998 to 2006. Despite the RBCT recommendation against culling, the 2010–2015 Coalition government implemented pilot badger culls. This paper provides an account of the evolution of bovine TB and badger control policy, focusing on (...) the 1997–2010 Labour, the 2010–2015 Coalition and the 2015-present Conservative governments. Interviews with bovine TB policy stakeholders supplement discussion of the development of bovine TB policy. The paper discusses the science and politics of bovine TB policy, in which there are different badger control policies in Westminster, Welsh and Scottish governments. Badger control is a highly polarised issue, and the Coalition and Conservative governments have been heavily criticised for a culling policy opposed by the independent scientific community. Recent governments have defended badger culling on the basis of veterinary advice and experience in countries such as New Zealand. The paper concludes with two key recommendations to inform controversial animal health and welfare policy issues such as bovine TB. First, mandatory Animal Welfare Impact Assessment provides objective data on the impacts of policy options on cows and badgers. Second, robust ethical analysis, conducted by independent experts using established moral frameworks, should be applied to animal health and welfare issues for the benefit of decision makers. (shrink)

Our focus here is on whether, when influenced by implicit biases, those behavioural dispositions should be understood as being a part of that person’s character: whether they are part of the agent that can be morally evaluated.[4] We frame this issue in terms of control. If a state, process, or behaviour is not something that the agent can, in the relevant sense, control, then it is not something that counts as part of her character. A number of theorists (...) have argued that individuals do not have control, in the relevant sense, over the operation of implicit bias. We will argue that this claim is mistaken. We articulate and develop a notion of control that individuals have with respect to implicit bias, and argue that this kind of control can ground character-based evaluation of such behavioural dispositions. (shrink)

There is a fundamental tension in business ethics between the apparent need to ensure ethical conduct through hierarchical control, and the encouragement of individuals' potential for autonomous moral judgement. In philosophical terms, these positions are consequentialist and Kantian, respectively. This paper assumes the former to be the dominant position in practice, and probably in theory also, but regards it as a misplaced extension of the more general managerial tendency to seek and maintain control over employees. While the functions (...) of such control are recognized, the arguments in favour of individuals' moral autonomy are pursued from both a Kantian and a social–theoretic perspective. Reference is made to Kohlberg's research on moral development that provides an insight into how individuals, through participation in debate with colleagues, might become more effective moral agents within organizational settings. This is contrasted with a managerial perspective, which pays lip service to individuals' right to such genuine involvement. The paper considers psychological manipulation and the legitimacy of managerial authority on matters of ethics, as opposed to in the purely technical context. The wider societal significance of such hierarchical power in organizations constitutes an important background to the paper. It is concluded that genuine, non‐manipulative, participation by employees is the way forward for the ethical management of business ethics. (shrink)

In recent years a series of developments in apparently loosely coupled domains have contributed to the development of new and vital perspectives on how to manage complex social systems such as corporations. These developments include improved communications technologies, increased awareness by constituencies of their potentials for influencing corporate behaviour, increased complexity and reduced transparency in large, heterogeneous organisations, a corresponding reduction in the capacity of traditional accounting and reporting systems to reflect organisational performance, new demands from employees as to their (...) work environments, from customers as to ecological and ethical sensitivity, from civil society and governments as to social and environmental accountability etc.A result is a major shift in the way organisations are choosing to observe themselves and to describe, measure, evaluate and report on their performance. From a focus on efficiency and control to a values-based perspective on management, corporate identity and success. And from a focus on legal compliance and financial performance to a focus on corporate social and ethical responsibility and accountability. (shrink)

Under the innovation-driven development strategy, the improvement of the core competitiveness of enterprises demonstrates increasing dependence on the ability of technological innovation. In this article, data of A-share listed companies in Shanghai and Shenzhen stock markets from 2008 to 2018 were selected as research samples for the analysis of the influencing factors and mechanism of enterprise technological innovation from the dual perspectives of the external economic environment and internal management system based on the use of the fixed-effect model. The results (...) show that government intervention significantly hinders enterprises' investment in resources for technological innovation, and less government intervention can improve the innovation investment of enterprises. The intervention of internal control fails to bring institutional advantages; rather, it aggravates the negative effect of government intervention on enterprise technological innovation. The research enriches the existing academic research results on government intervention, internal control quality, and enterprise technological innovation. The findings provide experience for accelerating the marketization process in China, enterprise governance, and improving the level of enterprise technological innovation. (shrink)

This paper investigates a composite learning prescribed performance control scheme for uncertain strict-feedback system. Firstly, a prescribed performance boundary condition is developed for the tracking error, and the original system is transformed into an equivalent one by using a transformation function. In order to ensure that the tracking error satisfies the PPB, a sufficient condition is given. Then, a control scheme of PPC combined with neural network and backstepping technique is proposed. However, the unknown functions cannot be guaranteed (...) to estimate accurately by this method. To solve this problem, predictive errors are defined by applying online recorded date and instantaneous date. Furthermore, novel composite learning laws are proposed to update NN weights based on a partial persistent excitation condition. Subsequently, the stability of the closed-loop system is guaranteed and all signals are kept bounded by using composite learning PPC method. Finally, simulation results verify the effectiveness of the proposed methods. (shrink)

BackgroundMental illness among Malaysian children is gradually reaching a fundamentally alarming point as it persistently shows increasing trend. The existing literature on the etiologies of children’s mental illness, highlights the most common cause to be ineffective or impaired parenting. Thus, efforts to combat mental illness in children should focus on improving the quality of parenting. Documented interventional studies focusing on this issue, particularly in Malaysia, are scarce and commonly report poor treatment outcomes stemming from inconvenient face-to-face instructions. Consequently, proposing an (...) accessible online and digital-assisted parenting program is expected to reach a larger number of parents, as it can overcome substantial barriers. Hence, this study aims to develop a universal digital-assisted preventive parenting intervention called DaPI, that aims to enhance mental health of children in Malaysia.MethodsA total of 200 parents of children aged 10–14 years will be recruited and randomized into two groups either intervention or waitlist-control based on a 1:1 ratio for a duration of 8 weeks. Those in the intervention group will receive eight sessions of the DaPI program that focus mainly on parenting and children’s mental health. The primary outcome of this study will essentially focus on the changes in parent-reported parenting behavior and parental self-efficacy. The secondary outcome will be changes in children’s mental health. Assessments will be arranged pre- and post-intervention as well as at the 1-month follow-up. Analyses will be conducted using a paired t-test and multivariate analysis of covariance.DiscussionThe expected outcome will be the establishment of DaPI in promoting children’s mental health by targeting changes in parenting behavior and parental self-efficacy in Malaysia. Findings from this study will be beneficial for policymakers to invest in parenting programs that could provide support to parents in enhancing their child’s overall development.Clinical trial registration[www.irct.ir], identifier [IRCT20211129053207N1]. (shrink)

Emotion is widely agreed to have two dimensions, valence and arousal. Few studies have explored the effect of emotion on conflict adaptation by considering both of these, which could have dissociate influence. The present study aimed to fill the gap as to whether emotional valence and arousal would exert dissociable influence on conflict adaptation. In the experiments, we included positive, neutral, and negative conditions, with comparable arousal between positive and negative conditions. Both positive and negative conditions have higher arousal than (...) neutral ones. In Experiment 1, by using a two-colour-word Flanker task, we found that conflict adaptation was enhanced in both positive and negative contexts compared to a neutral context. Furthermore, this effect still existed when controlling stimulus–response repetitions in Experiment 2, which used a four-colour-word Flanker task. The findings suggest emotional arousal enhances conflict adaptation, regardless of emotional valence. Thus, future studies should consider emotional arousal when studying the effect of emotion on conflict adaptation. Moreover, the unique role of the emotional context in conflict-driven cognitive control is emphasised. (shrink)

The Society of Control is a philosophical concept developed by Gilles Deleuze in the early 1990s to highlight the transition from Michel Foucault’s Disciplinary Society to a new social constitution of power assisted by digital technologies. The Society of Control is organized around switches, which convert data, and, in this way, exercise power. These switches take data inputs (digitized information about individuals) and transform them into outputs (decisions) based on their pre-programmed instructions. I call these switches “automated decision-making (...) algorithms” (ADMAs) and look at ethical issues that arise from their impact on human freedom. I distinguish between negative and positive aspects of freedom and examine the impact of the ADMAs on both. My main argument is that freedom becomes endangered in this new ecosystem of computerized control, which makes individuals powerless in new and unprecedented ways. Finally, I suggest a few ways to recover freedom, while preserving the economic benefits of the ADMAs. (shrink)

In `Underestimating Self-Control' (1997a), I argued that Jeanette Kennett and Michael Smith (1996) underestimate our capacity for synchronic self-control. They argued for a solution to a puzzle about such self-control that features non-actional exercises' of self-control. I argued in response that `a more robust, actional exercise of self-control is open to agents in scenarios of the sort in question' (1997a: 119). They disagree (Kennett and Smith 1997).In Mele 1997a, I resisted the temptation to criticize Kennett (...) and Smith's attempted resolution, because I thought it better to concentrate on sketching an alternative resolution. Here, I will argue that the resolution they offer is problematic and reply to their criticism (1997) of my suggested resolution. (shrink)

This paper aims to deflate the idea that democracy would be in essence a privileged locus of civic trust. Three claims are defended: (1) there is nothing specific to democracy regarding the affirmation that trust is required for social cooperation; (2) democracy, when conceived discursively, depends on guarded epistemic trust and; (3) popular control may require, in some contexts, institutions that express and foster distrust towards a specific section of the population. The conclusion to be drawn is that the (...) appropriateness of trust for the achievement of popular control over government depends on a contextual and realist assessment. (shrink)

Este artículo se propone analizar la producción tecnopolítica del cuerpo en la era farmacopornográfica, siguiendo las propuestas teóricas de Paul B. Preciado. En primer lugar se presenta el régimen disciplinario donde los procedimientos de vigilancia y control son exteriores al cuerpo. En un segundo momento, se analiza la constitución de un régimen somatopolítico de subjetividad, denominado farmacopornográfico, en el cual se utilizan tecnologías microprostéticas de control. A continuación, se señalan las principales tecnologías que crean, reproducen y consolidan un (...) determinado sujeto y corporalidad en la era farmacopornográfica. Finalmente, se plantea la hipótesis de que, a pesar de la producción biopolítica masiva de ideales heteronormativos, es posible una salida desde el interior de las identidades sexuales. (shrink)

An extensive critical study of cinematic representations of Irish queer masculinities.

The event-triggered consensus control for leader-following multiagent systems subjected to external disturbances is investigated, by using the output feedback. In particular, a novel distributed event-triggered protocol is proposed by adopting dynamic observers to estimate the internal state information based on the measurable output signal. It is shown that under the developed observer-based event-triggered protocol, multiple agents will reach consensus with the desired disturbance attenuation ability and meanwhile exhibit no Zeno behaviors. Finally, a simulation is presented to verify the obtained (...) results. (shrink)

Most recent discussion of the provocation defence has focused on the objective test, and little attention has been paid to the subjective test. However, the subjective test provides a substantial constraint: the killing must result from a provocation that undermines the defendant's self-control. The idea of loss of self-control has been developed in both the philosophical and psychological literatures. Understanding the subjective test in the light of the conception developed there makes for a far more coherent interpretation of (...) the provocation defence. It also makes clear just how radical various proposals for reform of the defence would be. (shrink)

In the late preschool years children acquire a "theory of mind", the ability to ascribe intentional states, including beliefs, desires and intentions, to themselves and others. In this paper I trace how children's ability to ascribe intentions is derived from parental attempts to hold them responsible for their talk and action, that is, the attempt to have their behavior meet a normative standard or rule. Self-control is children's developing ability to take on or accept responsibility, that is, the ability (...) to ascribe intentions to themselves. This is achieved, I argue, when they possess the ability to hold an utterance or rule in mind in the form of a quoted expression, and second, when they grasp the causal relation between the rule and their action. The account of how children learn to ascribe intention to themselves and others will then be used to explore the larger question of the relations amongst language, intentional states and the ascription and avowal of those states. (shrink)

Background: Aggression is an important risk factor for delinquency and crime in adolescents. Previous studies have indicated that childhood maltreatment plays an important role in the development of aggression. However, whether the effect could be mediated by other factors is still unknown. Evidence suggests that callous-unemotional (CU) traits and self-control may be candidate mediators in the relationship between childhood maltreatment and aggression.Methods: A total of 585 male juvenile delinquents from China were recruited for the present study. We measured self-reported (...) childhood maltreatment, CU traits, self-control, and aggression with the short form of the Childhood Trauma Questionnaire (CTQ-SF), the Inventory of Callous-Unemotional Traits (ICU), the Self-Control Scale (SCS), and the Aggression Questionnaire (AQ), respectively. Furthermore, we constructed multiple mediation models to investigate the mediating effects of CU traits and self-control on the relationship between childhood maltreatment and aggression. Childhood maltreatment and aggression were entered into the model as the independent and dependent variables, respectively, and CU traits and self-control were treated as the mediating variables. In addition, the moderating role of self-control in the relationship between childhood maltreatment and aggression was tested by constructing a moderation model.Results: Correlation analysis showed significant positive correlations among childhood maltreatment, CU... (shrink)

I will discuss for two popular but apparently contradictory theses: T1. The democratic control of science – the aims and activities of science should be subject to public scrutiny via democratic processes of representation and participation. T2. The scientific control of policy, i.e. technocracy – political pro- cesses should be problem-solving pursuits determined by the methods and results of science and technology. Many arguments can be given for (T1), both epistemic and moral/political; I will focus on an argument (...) based on the role of non-epistemic values in policy-relevant science. I will argue that we must accept (T2) as a result of an appraisal of the nature of contemporary political problems. Technocratic systems, however, are subject to serious moral and political objections; these difficulties are sufficiently mitigated by (T1). I will set out a framework in which (T1) and (T2) can be consistently and compellingly combined. (shrink)

In this revised edition with a new preface from the editor, leading scientists explain the nature and goals of `test tube' reproduction and genetic engineering, and their eugenic implications. In contrast to the Warnock report, the extended commentary considers the issues in the context of a social ethic rather than the individualist viewpoint.