This contributed volume collects papers related to the Logic in Question workshop, which has taken place annually at Sorbonne University in Paris since 2011. Each year, the workshop brings together historians, philosophers, mathematicians, linguists, and computer scientists to explore questions related to the nature of logic and how it has developed over the years. As a result, chapter authors provide a thorough, interdisciplinary exploration of topics that have been studied in the workshop. Organized into three sections, the first part of the book focuses on historical questions related to logic, the second explores philosophical questions, and the third section is dedicated to mathematical discussions. Specific topics include:

logic and analogy

Chinese logic

nineteenth century British logic (in particular Boole and Lewis Carroll)

logical diagrams 

the place and value of logic in Louis Couturat's philosophical thinking

contributions of logical analysis for mathematics education

the exceptionality of logic

the logical expressive power of natural languages

the unification of mathematics via topos theory
Logic in Question will appeal to pure logicians, historians of logic, philosophers, linguists, and other researchers interested in the history of logic, making this volume a unique and valuable contribution to the field.

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