1. Defaults in update semantics

   • Frank Veltman

   OriginalPaper Pages: 221 - 261

2. Iterated revision and minimal change of conditional beliefs

   • Craig Boutilier

   OriginalPaper Pages: 263 - 305

3. What is ceteris paribus preference?

   • Sven Ove Hansson

   OriginalPaper Pages: 307 - 332