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Propositional dynamic logic (PDL) is a framework for reasoning about nondeterministic program executions (or, more generally, nondeterministic actions). In this setting, nondeterminism is taken as a primitive: a program is nondeterministic iff it has multiple possible outcomes. But what is the sense of “possibility” at play here? This talk explores an epistemic interpretation: working in an enriched logical setting, we represent nondeterminism as a relationship between a program and an agent deriving from the agent’s (in)ability to adequately measure the dynamics of the program execution. More precisely, using topology to capture the observational powers of an agent, we define the nondeterministic outcomes of a given program execution to be those outcomes that the agent is unable to rule out in advance. In this framework, determinism coincides exactly with continuity: that is, determinism is continuity in the observation topology. This allows us to embed PDL into (dynamic) topological (subset space) logic, laying the groundwork for a deeper investigation into the epistemology (and topology) of nondeterminism.

The seminar is concerned with applying formal methods to fundamental issues, with an emphasis on probabilistic reasoning, decision theory and games. In this context “logic” is broadly interpreted as covering applications that involve formal representations. The topics of interest have been researched within a very broad spectrum of different disciplines, including philosophy (logic and epistemology), statistics, economics, and computer science. The seminar is intended to bring together scholars from different fields of research so as to illuminate problems of common interest from different perspectives. Throughout each academic year, meetings are regularly presented by the members of the seminar and distinguished guest speakers.

details tba

02/08/2019 Faculty House, Columbia University
4:00 PM

03/29/2019 Faculty House, Columbia University
4:00 PM

04/19/2018 Faculty House, Columbia University
4:00 PM

Convergence to the truth is viewed with some ambivalence in philosophy of science. On the one hand, methods of inquiry that lead to the truth in the limit are prized as marks of scientific rationality. But an agent who, by using some method, expects to always converge to the truth seems to fail a minimum standard of epistemic modesty. This point was recently brought home by Gordon Belot in his critique of Bayesian epistemology. In this paper I will study convergence to the truth theorems within the framework of Edward Nelson’s radically elementary probability theory. This theory provides an enriched conceptual framework for investigating convergence and gives rise to an appropriately modest from of Bayesianism.

The seminar is concerned with applying formal methods to fundamental issues, with an emphasis on probabilistic reasoning, decision theory and games. In this context “logic” is broadly interpreted as covering applications that involve formal representations. The topics of interest have been researched within a very broad spectrum of different disciplines, including philosophy (logic and epistemology), statistics, economics, and computer science. The seminar is intended to bring together scholars from different fields of research so as to illuminate problems of common interest from different perspectives. Throughout each academic year, meetings are regularly presented by the members of the seminar and distinguished guest speakers.

details tba

02/08/2019 Faculty House, Columbia University
4:00 PM

03/22/2019 Faculty House, Columbia University
4:00 PM

04/19/2018 Faculty House, Columbia University
4:00 PM

Critique is an assertion of values pitted against a state of affairs. To say that things should not be the way they are–to respond to questions such as ‘Why do I think this political or economic arrangement is wrong (and why should I care?)?’ implies an ethical stance. Critique thus draws together fact and value, domains that a long tradition of moral thought has argued exist on distinct planes. For there are dimensions of political life that are incomprehensible without this conjunction between ethical motivations and social realities. But if they are to have political consequences, such questions cannot be confined to private introspection. Scale matters. This talk looks at the articulation between everyday interactions and social movements to show the interplay among the first, second, and third person stances that characterize ethical life. Drawing ethnographic examples from American feminism and Vietnamese Marxism, it considers some of the ways in which ethical intuitions emerge, consolidate, and change, and argues that objectifications and the reflexivity they facilitate help give ethical life a social history.

This essay tries to develop a “black radical Kantianism” – that is, a Kantianism informed by the black experience in modernity. After looking briefly at socialist and feminist appropriations of Kant, I argue that an analogous black radical appropriation should draw on the distinctive social ontology and view of the state associated with the black radical tradition. In ethics, this would mean working with a (color-conscious rather than colorblind) social ontology of white persons and black sub-persons and then asking what respect for oneself and others would require under those circumstances. In political philosophy, it would mean framing the state as a Rassenstaat (a racial state) and then asking what measures of corrective justice would be necessary to bring about the ideal Rechtsstaat.

Response by César Cabezas Gamarra.

Presented by the German Idealism Workshop

A number of puzzles concerning how truth-ascriptions are grounded have recently been discovered by several theorists, following Fine (2010). Most previous commentators on these puzzles have taken them to shed light on the theory of ground. In this paper, I argue that they also shed light on the theory of truth. In particular, I argue that the notion of ground can be deployed to clearly articulate one strand of deflationary thinking about truth, according to which truth is “metaphysically lightweight.” I will propose a ground-theoretic explication of the (entirely bearable) lightness of truth, and then show how this broadly deflationary view yields a novel solution to the puzzles concerning how truth is grounded. So, if the proposal I sketch is on target, the theory of truth and the theory of ground interact fruitfully: we can apply the notion of ground to offer a clear explication of the deflationist claim that truth is “metaphysically lightweight” that both captures the motivations for that claim and solves the puzzles.

Sjoerd van Tuinen and Jürgen Schaflechner will present their film “Toxic Reigns of Resentment” featuring Wendy Brown, Grayson Hunt, Rahel Jaeggi, Alexander Nehamas, Robert Pfaller, Gyan Prakash, Peter Sloterdijk, and Sjoerd van Tuinen. NSSR philosopher Jay Bernstein will respond after the screening.

After the fall of the Soviet empire and the triumph of global capitalism, modernity appeared to keep its dual promise of liberty and equality. The spreading of human rights and democratic forms of government were intrinsically linked to free flows of global capital and free markets. Supported by technological developments and an ever-increasing digitalization of daily life, the future contained the promise of abundance and recognition for all.

Only a few decades later, however, we witness an oppositional trend: A revival of nationalism paired with xenophobia, an increasing tribalization of politics, a public sphere oscillating between cruelty and sentimentality, and a Left caught up in wounded attachments. Social media, once the promise to give voice to the disempowered, link cognitive capitalism with a culture of trolling and hyper moralization. Algorithms programmed to monetarize outrage feed isolated information bubbles and produce what many call the era of post-truth politics.

How did we enter this toxic climate? Are these developments a response to the ubiquity of neoliberal market structures eroding the basic solidarities in our society? Has the spread of social media limited our ability to soberly deal with conflicting life worlds? And have both the left and the right given in to a form of politics where moralization and cynical mockery outdo collective visions of the future?

In public discourse, but also in political theory, the opinion prevails, that democracy is incompatible with aspirations of truth. Some assume, in the Hobbesian tradition, that civic peace requires that truth assertions be restricted to science and religion (normative positivism), whereas the political sphere is constituted by interests, bargaining and collective decisions based on interests, bargaining and rules of aggregation, be they implicit or explicit. In this perspective Collective Choice as preference aggregation is paradigmatic for the understanding of democracy. Postmodernist and neo-pragmatist thought dismisses truth, because it threatens solidarity and belonging. Libertarian political thought relies on market mechanisms reducing citizens to consumers and producers of material and immaterial goods like security and welfare. Accounts of deliberative democracy focus on reasoning in the public sphere but dismiss a realistic understanding of truth, because it is thought to threaten collective and individual self-determination.

In my talk I will argue that a realistic understanding of empirical and normative truth is compatible, even necessary, for an adequate understanding of democracy, that truth assertions do not threaten civic peace, that postmodernist relativity undermines democratic practice, that libertarian market-orientation is incompatible with the status of citizens in democracy and that even deliberative, but anti-realist, accounts of democracy do not allow for an adequate understanding of democracy. My argument is based on a Davidsonian, or pragmatist, understanding of truth, therefore one might say: it critizises normative positivism, postmodernism, libertarianism, and critical theory using pragmatist insights.

Julian Nida-Rümelin presently holds a chair for philosophy and political theory at Ludwig-Maximilians-Universität München, is a member of the European Academy of Sciences, was president of the German Philosophical Association (DGphil) and state-minister for culture and media in the first government of Gerhard Schröder. The topics of his books include Democracy as Cooperation (1999); Democracy and Truth (2006), translated in Chinese and Italian, Philosophy and the form of Life (2009), Realism (2018) and A Theory of Practical Reason (2020, forthcoming, de Gruyter and PUP).

Generous support provided by the New York Institute of Philosophy.