Munich Center for Mathematical Philosophy (MCMP)

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Predicate Approaches to Modality (September 12, 2014)

Idea and Motivation

Predicate Approaches to modality are a viable alternative to the now standard operator approaches to modality. They allow for a uniform treatment of truth and the modal notions, are expressively rich and they fit in nicely with the relational analysis of propositional attitudes. The workshop is intended to further and foster research on predicate approaches to modality in philosophical and mathematical logic.

Topics and questions may include the following:

  • How should an adequate modal theory look like?
  • Axiomatic modal theories
  • Semantic modal theories.
  • How should or can we consistently combine modal theories to obtain multimodal theories?
  • Does the interaction of modal predicates create new phenomena such as paradoxes of interaction or greater expressive strength?
  • De re modality and predicate approaches to modality.
  • Can the expressive strength of the predicate approach be recovered within the operator approach.


Keynote Speakers


10:00 - 11:15 Philip Welch: On some theories of truth and of set theory
11:15 - 12:30 Karl-Georg Niebergall: Remarks on intensionality and on the combination of first-order theories
12:30 - 14:15 Lunch
14:15 - 15:30 Volker Halbach: de re modality and modal predicates
15:30 - 16:15 Kyle Banick: Epistemic Analogues of the Halbach-Welch Fixed-Point Construction
16:15 - 16:45 Coffee
16:45 - 17:30 Catrin Campbell-Moore: Revision Semantics for Probabilities
17:30 - 18:45 Leon Horsten: Revision theories for untyped probability predicates
19:30 Dinner



  • Seminarraum 021, Ludwigstr. 31

Contact and Attendance

Everybody is welcome to attend the conference free of charge. However, we ask to confirm your presence by sending an e-mail to one of the organizers: Martin Fischer ( or Johannes Stern (