Learning to program in LISP

We have gathered protocols of subjects in their first 30 hours of learning LISP. The processes by which subjects write LISP functions to meet problem specifications has been modeled in a simulation program called GRAPES (Goal Restricted Production System). The GRAPES system embodies the goal-restricted architecture for production systems as specified in the ACT* theory (Anderson, 1983). We compare our simulation to human protocols on a number of problems. GRAPES simulates the top-down, depth-first flow of control exhibited by subjects and produces code very similar to subject code. Special attention is given to modeling student solutions by analogy, how students learn from doing, and how failures of working memory affect the course of problem-solving. Of major concern is the process by which GRAPES compiles operators in solving one problem to facilitate the solution of later problems.     

Stout,Rawls, and the Idea of Public Reason

Jeffrey Stout claims that John Rawls's idea of public reason (IPR) has contributed to a Christian backlash against liberalism. This essay argues that those whom Stout calls “antiliberal traditionalists” have misunderstood Rawls in important ways, and goes on to consider Stout's own critiques of the IPR. While Rawls's idea is often interpreted as a blanket prohibition on religious reasoning outside church and home, the essay will show that the very viability of the IPR depends upon a rich culture of deliberation in which all forms of reasoning can be put forth for consideration. This clarification addresses the perception that the IPR imposes an “asymmetrical burden” upon believers. In fact, the essay suggests that there are good reasons why believers, qua believers, might endorse the IPR.     

Exemplarist Environmental Ethics

This article argues that environmental ethics can deemphasize environmental problem‐solving in preference for a more exemplarist mode. This mode will renarrate what we admire in those we have long admired, in order to make them resonate with contemporary ethical needs. First, I outline a method problem that arose for me in ethnographic fieldwork, a problem that I call, far too reductively, “solution thinking.” Second, I relate that method problem to movements against “quandary ethics” in ethical theory more broadly. Third, I discuss some interpretive work I am engaged in about Henry David Thoreau and how it bears on the methodological issues my fieldwork raised. I argue that some of the most important icons of right relation to environment, especially Francis of Assisi and Thoreau, should be envisioned as far more politically invested than they usually are. They demonstrate to scholars of religious ethics that an exemplarist ethic focused on character need not neglect politics.     

Interacting plans

The paper explores certain phenomena which arise in stories, conversations, and human activity in general when the plans of two individuals are formed and carried out in an interactive situation. A notation system for representing interacting plans is introduced and applied in the analysis of a small portion of “Hansel and Gretel.” The analysis illustrates how a single actor plan can be modified by the needs of cooperative interaction with others and how cooperative interactive episodes can be transformed and used deceptively by one party in achieving his or her own covert goals.     

Emmanuel Levinas,Radical Orthodoxy,and an Ontology of Originary Peace

Radical Orthodoxy, a growing movement among contemporary Christian theologians, argues that the prominent philosophical paradigms of modern and postmodern thought lack transcendence, are ultimately nihilistic, and are guided by an ontology of violence. Among the thinkers Radical Orthodoxy criticizes are Hegel, Nietzsche, and Hobbes, but surprisingly also the Jewish philosopher Emmanuel Levinas, whom they claim offers an ethics for nihilists. In this essay, I analyze the claims of two prominent thinkers in Radical Orthodoxy, John Milbank and Catherine Pickstock, and argue that their account of Levinas is not only unfounded but point out the ways in which Levinas himself is also just as critical of the prevailing ontology of violence that figures in modern accounts of intersubjectivity and politics. Indeed, in his own way, Levinas also offers an ontology of peace, making him an important dialogue partner for Radical Orthodoxy's construction of an alternative ethics and politics.     

Diagnostic models for procedural bugs in basic mathematical skills

A new diagnostic modeling system for automatically synthesizing a deep-structure model of a student's misconceptions or bugs in his basic mathematical skills provides a mechanism for explaining why a student is making a mistake as opposed to simply identifying the mistake. This report is divided into four sections: The first provides examples of the problems that must be handled by a diagnostic model. It then introduces procedural networks as a general framework for representing the knowledge underlying a skill. The challenge in designing this representation is to find one that facilitates the discovery of misconceptions or bugs existing in a particular student's encoding of this knowledge. The second section discusses some of the pedagogical issues that have emerged from the use of diagnostic models within an instructional system. This discussion is framed in the context of a computer-based tutoring/gaming system developed to teach students and student teachers how to diagnose bugs strategically as well as how to provide a better understanding of the underlying structure of arithmetic skills. The third section describes our uses of an executable network as a tool for automatically diagnosing student behavior, for automatically generating “diagnostic” tests, and for judging the diagnostic quality of a given exam. Included in this section is a discussion of the success of this system in diagnosing 1300 school students from a data base of 20.000 test items. The last section discusses future research directions.     

Henry David Thoreau's Anti‐Work Spirituality and a New Theological Ethic of Work

Although Henry David Thoreau stands outside the Christian canon, his outlook on the relations among spirituality, ecology, and economy highlights how Christian theologians can develop a theological work ethic in our era of economic and ecological precarity. He can furthermore help theologians counter the pro‐work bias in much Christian thought. In Walden, Thoreau shows that the best work is an ascetic practice that reveals and reaps the abundance of nature and connects the person to the immanent divine and thereby glimpsing eternity. Thoreau thus offers the outline of a transformed theology of work even as he challenges Protestant vocationalism in the early industrial era. He is therefore a fitting if challenging guide for formulating a theology of the self as agent and product of work, at a moment when the postindustrial ideal of work that is both meaningful and remunerative seems ever more unattainable while the negative impact of our work on nonhuman nature is ever more apparent.     

Alterity,Intimacy, and the Cultural Turn in Religious Ethics

This essay responds to four critics of Friends and Other Strangers: Studies in Religion, Ethics and Culture: Diana Fritz Cates, Eric Gregory, Ross Moret, and Atalia Omer. Focusing on the book’s organizing concepts of intimacy and alterity, engagement with empirical sources, discussion of Augustine’s thought, and attention to moral psychology and political morality, these interlocutors take up various strands in the book’s argument and extend them into metaethical, normative, and metadisciplinary domains. The author organizes his response under three rubrics: Metaethics and Personal Relationships; Political Morality; and Multidisciplinary Horizons.     

Rethinking Economic Inequality

Secular discourse about problem of economic inequality rests on two foundational premises that are problematic from a theological point of view. First, individuals enter into society with the aim of bettering their own condition. Second, bettering one's own condition entails accruing more wealth and power so that one can fulfill more of one's desires. In this paper I argue that insofar as these premises shape market behavior, they actively promote excessive economic inequality. Ethical responses to the problem of economic inequality that do not challenge these assumptions are unlikely to effectively promote justice. A theological response to the problem of economic inequality should work to promote cultural change by reminding us that genuine human flourishing depends on communal ties and the higher human goods that material wealth is properly meant to support.