1. A Proof System for Contact Relation Algebras

   • Ivo Düntsch
   • Ewa Orłowska

   OriginalPaper Pages: 241 - 262

2. CE is Not a Conservative Extension of E

   • Edwin D. Mares

   OriginalPaper Pages: 263 - 275

3. Proto-Semantics for Positive Free Logic

   • G. Aldo Antonelli

   OriginalPaper Pages: 277 - 294

4. Propositional Logic of Essence

   • Fabrice Correia

   OriginalPaper Pages: 295 - 313

5. Coherentist Contraction

   • Sven Ove Hansson

   OriginalPaper Pages: 315 - 330