PD Dr. Martin Fischer

Researcher and Lecturer (Privatdozent)

Chair of Logic and Philosophy of Language, MCMP

Office address:

Ludwigstraße 31

Room 234

80539 München

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Office hours:

By appointment

Personal information

I studied at and received my PhD from LMU. My first postdoc position was at the KU Leuven in the Formal Epistemology Project. Thereafter I worked at the MCMP in a DFG-project on syntactical treatments of modalities, with Prof. Leitgeb as principal investigator. After a one-year stay at the Scuola Normale Superiore, I carried out my own DFG-funded project on Logical Pluralism, lasting three years, at the MCMP. I have held the position of assistant at the MCMP over several semesters. In July I will start as the PI of the AHRC-DFG funded project: The Mathematical Turn in Philosophy: Measurement, Computation, (De)Idealization.

Research interests

One of my main research interests is truth from the perspective of philosophy of language as well as logic, especially axiomatic theories of truth. I am also interested in modalities. In the area of philosophical logic, I carry out research on questions on logical pluralism. In the philosophy of mathematics, epistemic questions are especially relevant. Besides questions of implicit commitment, I am interested in idealizations taking place in formal treatments and the possibility of avoiding those.

Selected publications

  1. Carlo Nicolai, Martin Fischer, Mario Piazza: A reflection principle for Kripkean truth, Journal of Philosophy (forthcoming).
  2. Fischer, M. & Zicchetti, M.: Definite Totalities and Determinate Truth in Conceptual Structuralism. Synthese, 203(26): (2024).
  3. Fischer, M. & Zicchetti, M.: Internal categoricity, truth and Determinacy. Journal of Philosophical Logic 52(5): 1295-1325 (2023).
  4. Fischer, M. & Nicolai, C. & Dopico, P.: Nonclassical truth with classical strength. A proof-theoretic analysis of compositional truth over HYPE. Review of Symbolic Logic 16 (2): 425-448 (2023).
  5. Fischer, M.: Is the Hype about strength warranted?. Synthese 200(3): 1-25 (2022).
  6. Fischer, M.: Sequent calculi for the propositional logic of HYPE. Studia Logica 110(3): 643-677 (2021).
  7. Fischer, M.: Another look at reflection. Erkenntnis 88(2): 479-509 (2021).
  8. Fischer, M. & Horsten, L. & Nicolai, C.: Hypatia's silence, Truth, justification, and entitlement. Nous 55(1): 62-85 (2021).
  9. Fischer, M. & Gratzl, N.: Truth, Partial Logic and Infinitary Proof Systems. Studia Logica 106(3): 515-540 (2018).
  10. Fischer, M. & Horsten, L. & Nicolai, C.: Iterated Reflection over Full Disquotational Truth. Journal of Logic and Computation 27(8): 2631-2651 (2017).
  11. Fischer, M. & Halbach, V. & Kriener, J. & Stern, J.: Axiomatizing Semantic Theories of Truth. Review of Symbolic Logic 8(2): 257-278 (2015).