This open access book investigates the role played by identity of proofs in proof-theoretic semantics. It develops a conception of proof-theoretic semantics as primarily concerned with the relationship between proofs (understood as abstract entities) and derivations (the linguistic representations of proofs). It demonstrates that identity of proof is a key both to clarify some still not wholly understood notions at the core of proof-theoretic semantics, such as harmony ; and to broaden the range of the phenomena which can be analyzed using the tools of this semantic paradigm, so as to include for instance paradoxes .
The volume covers topics such as the philosophical significance of different criteria of identity of proofs, and adequacy conditions for an intensional account of the notion of harmony. The author also examines the Prawitz-Tennant analysis of paradoxes by investigating on the one hand the prospectsof turning it into a theory of meaning for paradoxical languages, and on the other hand two distinct kinds of phenomena, first observed by Crabbe and Ekman, showing that the Tennant-Prawitz criterion for paradoxicality overgenerates. This volume is of interest to scholars in formal and philosophical logic.

Discloses the significance of identity of proofs for proof-theoretic semantics Offers the tools for analyzing (hyper-)intensional features of the meaning of logical constants Develops a philosophical explanation of paradoxes in the framework of proof- theoretic semantics This book is open access, which means that you have free and unlimited access

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Luca Tranchini is post-doctoral researcher at the Logic and Language Theory group of the university of Tübingen. He works on philosophical, mathematical and computational aspects of proof theory, with a focus on proof-theoretic semantics. He has contributed to the correct understanding of the notion of harmony, to the analysis of paradoxes using proof-theoretic means, and to the study of the duality between proofs and refutations in constructivism.

Klappentext

This open access book investigates the role played by identity of proofs in proof-theoretic semantics. It develops a conception of proof-theoretic semantics as primarily concerned with the relationship between proofs (understood as abstract entities) and derivations (the linguistic representations of proofs). It demonstrates that identity of proof is a key both to clarify some -still not wholly understood- notions at the core of proof-theoretic semantics, such as harmony; and to broaden the range of the phenomena which can be analyzed using the tools of this semantic paradigm, so as to include for instance paradoxes. The volume covers topics such as the philosophical significance of different criteria of identity of proofs, and adequacy conditions for an intensional account of the notion of harmony. The author also examines the Prawitz-Tennant analysis of paradoxes by investigating on the one hand the prospectsof turning it into a theory of meaning for paradoxical languages, and on the other hand two distinct kinds of phenomena, first observed by Crabbe and Ekman, showing that the Tennant-Prawitz criterion for paradoxicality overgenerates. This volume is of interest to scholars in formal and philosophical logic.

Inhalt
Part 1. Harmony. Chapter 1. Harmony via reductions and expansions.- Chapter 2. Identity of proofs.- Chapter 3. Towards an intensional notion of harmony.- Part 2. Paradox.- Chapter 4. Paradoxes: a natural deduction approach.- Chapter 5. Validity, sense and denotation in the face of paradoxes.- Chapter 6. Two kinds of difficulties.- Conclusion.