This volume of the Logica Yearbook series brings together articles presented at the annual international symposium Logica 2010, Hejnice, the Czech Republic. the articles range over mathematical and philosophical logic, history and philosophy of logic, and the analysis of natural language.

This volume of the Logica Yearbook series brings together articles presented at the annual international symposium Logica 2011, Hejnice, the Czech Republic. The articles range over mathematical and philosophical logic, history and philosophy of logic, and the analysis of natural language.

Inferences with Ignorance focuses on two formal logic systems that employ the type of inferences in which questions are used in addition to statements. Not merely capturing questions as part of a logical apparatus, Michal Pelis also emphasizes the role of question-asking in communication. The book presents options for formalizing questions using sets of -direct answers, - demonstrates where questions are used in inferences, and explores asking questions and seeking answers as important components of everyday communication, proposing ways of using questions within a formal system that...