1. Introduction

   • Françcois Lepage
   • Elias Thijsse
   • Heinrich Wansing

   Editorial Introduction Pages: 1 - 4

2. Partiality and Its Dual

   • J. Michael Dunn

   OriginalPaper Pages: 5 - 40

3. Making Things Happen

   • Jan van Eijck

   OriginalPaper Pages: 41 - 58

4. A Set Theory with Support for Partial Functions

   • William M. Farmer
   • Joshua D. Guttman

   OriginalPaper Pages: 59 - 78

5. On Agents That Have the Ability to Choose

   • Wiebe van der Hoek
   • Bernd van Linder
   • John-Jules Meyer

   OriginalPaper Pages: 79 - 119

6. Sequent Calculi and Decision Procedures for Weak Modal Systems

   • René Lavendhomme
   • Thierry Lucas

   OriginalPaper Pages: 121 - 145

7. Partial Monotonic Protothetics

   • François Lepage

   OriginalPaper Pages: 147 - 163

8. Ability and Knowing How in the Situation Calculus

   • Yves Lespérance
   • Hector J. Levesque
   • Richard B. Scherl

   OriginalPaper Pages: 165 - 186

9. Skepticism and Epistemic Logic

   • Peter K. Schotch

   OriginalPaper Pages: 187 - 198