Christoph Lumer

Pascal‘s wager is expounded as a paradigm case of a practical,decision-theoretical argument for acting as if a proposition is true when wehave no theoretical reasons to accept or reject it (1.1.–1.2.). Thoughthe paradigm is fallacious in various respects there are valid and adequatearguments for acting as if certain propositions are true: that theoreticalentities exist, that there are material perceptual objects, that the worldis uniform across time (1.3). After this analysis of examples the author‘sgeneral approach for developing criteria for the validity and adequacy oftypes of argument (2.1.) is applied: Having discussed some problems(2.2.–2.3.), a general epistemic principle for such ’pascal arguments‘is developed, which characterizes their premisses and, if introduced as anadditional premiss, can make them deductively valid (2.4).

This contribution discusses some problems of Pragma-Dialectics and explains them by its consensualistic view of the function of argumentation and by its philosophical underpinnings. It is suggested that these problems can be overcome by relying on a better epistemology and on an epistemological theory of argumentation. On the one hand Pragma-Dialectics takes unqualified consensus as the aim of argumentation, which is problematic, (Sect. 2) on the other it includes strong epistemological and rationalistic elements (Sect. 3). The problematic philosophical underpinnings of Pragma-Dialectics, specifically Critical Rationalism as well as Logical Constructivism and Dialogic Logic of the Erlangen School, are among the sources of this incoherence (Sect. 4). A detailed critique of the Pragma-Dialectical discussion rules shows the negative consequences of this foundation and indicates how they could be avoided (Sects. 5, 6)

This paper tries to provide a complete list and classification of the motives for acting in accordance with morals, to explain the mechanisms underlying the less transparent among these motives, and to probe which of these motives are suited for justifying morals. (1) After giving reasons for the importance of an empirical theory of moral motives for ethics, and after specifying the exact question of the present study (2) a general model of moral action (3) and a main classification of the motives for acting morally is presented. (4) Self-transcendent motives, (5) motives close to morals, like sympathy and respect, (6) and moral motives in the narrow sense, which proceed from moral judgements, are scrutinized in detail. Only the motives near to morals and interest in cooperation but not the moral motives in the narrow sense are suited for justifying morals. (7) A concluding sketch of the development of moral judgements shows that only motives near to morals and interest in cooperation (but not e.g. pure reason) are also the sources of autonomously developed moral criteria.

Practical arguments for actions are arguments which, besides their epistemic function, shall motivate an addressee to execute the justified action. First, a strategy is developed how this motivational and other requirements can be met. Part of this strategy is to identify a thesis for which holds that believing it motivates in the required manner. Second, relying on empirical decision theory, such a thesis is identified. Finally, precise validity criteria for the respective arguments are developed.

Many important thinkers in the philosophical tradition, like Aristotle or Hume, have used an explicit theory of action as the basis of their respective normative theories of practical rationality and morality. The idea behind this architecture of theories is that action theory can inform us about the origin, bonds, reach and limits of practical reason. The aim of this book is to revive this direct connection between action theory and practical philosophy, in particular to provide systematic action-theoretical underpinnings for the discussion about the normative structure of practical reason. This book brings together a collection of specially commissioned essays from internationally prestigious scholars in the field and represents the state of the art in contemporary philosophy of action. The book is divided into three parts: i. conceptual work about what actions, intentions and intentional actions are; ii. empirical theory of practical deliberation; and iii.theories about the action theoretic features of autonomy. The volume significantly advances these three lines of research and offers important new contributions to each of them.

Being a formal and general as well as the most widely accepted approach to practical rationality, rational decision theory should be crucial for justifying rational morals. In particular, acting morally should also be rational in decision theoretic terms. After defending this thesis, in the critical part of the paper two strategies to develop morals following this insight are criticized: game theoretical ethics of cooperation and ethical intuitionism. The central structural objections to ethics of cooperation are that they too directly aim at the rationality of moral action and that they to do not encompass moral values or a moral desirability function. The constructive half of the paper takes up these criticisms by developing a two-part strategy to bring rationality and morals in line. The first part is to define ‘moral desirability’. This is done, using multi-attribute utility theory, by equating several adequate components of an individual’s comprehensive utility function with the moral desirability function. The second part is to introduce mechanisms, institutions, in particular socially valid moral norms, that provide further motivation for acting in accordance with morals

Zunächst werden die Kernthesen von Habermas' Diskursethik vorgestellt, insbesondere der Universalisierungsgrundsatz U und das diskursethische Prinzip D. Eine ausführliche Analyse zeigt dann, daß Habermas' Argumentationen für diese Prinzipien in mehrfacher Hinsicht ungültig sind. Die Betrachtung früherer Varianten dieser Argumentationen und späterer Kommentare Habermas' macht zudem eine gewisse Wendung Habermas' weg von der Transzendentalpragmatik hin zum Intuitionismus und eine Abschwächung seines Begründungsanspruchs bis hin zu dessen Annullierung deutlich. Eine Kritik an vier Interpretationen von U selbst und an den beiden Hauptinterpretationen von D erweist diese Moralkriterien als in vielerlei Hinsicht unbrauchbar und als bloß formelhafte Vereinigung schwer zu vereinender Ideale

In this paper an empirical theory about the nature of intention is sketched. After stressing the necessity of reckoning with intentions in philosophy of action a strategy for deciding empirically between competing theories of intention is exposed and applied for criticizing various philosophical theories of intention, among others that of Bratman. The hypothesis that intentions are optimality beliefs is defended on the basis of empirical decision theory. Present empirical decision theory however does not provide an empirically satisfying elaboration of the desirability concepts used in these optimality beliefs. Based on process theories of deliberation two hypotheses for filling this gap are developed.