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      Modal LogicDeontic LogicLogic of ActionAction Logics
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      Modal LogicProof TheoryHistory of Logic
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      Modal LogicPhilosophical LogicDeontic LogicLogic of Norms
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      Modal LogicPhilosophical LogicPhilosophy of LogicLogical Consequence
In this (early draft) paper I look at a way to generalize Martin van Hees' work on collective decision procedures. I introduce a way to separate the power structure of a game form from the decision procedure for the game using effectivity... more
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      Game TheoryCollective ActionDecision And Game TheorySocial Choice Mathematics
The square of opposition is a simple geometrical figure expressing some fundamental ideas about cognition. It is based on Aristotle’s philosophy and has been fascinating people for two thousand years. The three notions of opposition... more
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      LogicHistory of LogicPhilosophical LogicPhilosophy of Logic
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      Philosophy and Religious StudiesMathematical Sciences
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    • Applied Logic
In this paper I explore agnosticism from an epistemic logic perspective. The view of agnosticism I take is that one is agnostic about a proposition when one believes that proposition to be consistent with what one knows. I look at how... more
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This essay investigates the possibility of analysingì ought to do a' asìt ought to be that i do a' in an axiological setting. Axiological conceptions of deontic logic dene what ought to be as that which is better than the alternative, and... more
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      Collective ActionDeontic LogicLogic of ActionAction Logics
The purpose of this paper is to explore the use of van Hees and Braham's conception of causal responsibility in terms of NESS (Necessary Element of a Sufficient Set) conditions in formal models of collective action. In particular , the... more
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      Game TheoryCollective ActionDecision And Game TheoryCollective Responsibility
Acres of paper have been used in discussions of the knowability paradox. But it still hasn't gone away, although it has been argued that it should, cf. Jenkins [2009]. In this note I will consider the general form of the argument and what... more
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In this note I offer a formal argument that supports David Christensen's conjecture that logically omniscient agents are also omniscient. Declan Smithies has argued that Chirstensen's conjecture is wrong. I argue that within Smithies'... more
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s of Invited Talks 5 Can there be an Epistemic Square of Opposition? PASCAL ENGEL University of Geneva, Switzerland and Institut Jean Nicod, France pascal.engel@lettres.unige.ch It seems (more or less) easy to transpose the alethic square... more
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      PsychologyDeontic LogicConsistency of Norms