1 “.... They provide the basis for the wider field of Fuzzy Logic, encompassing diverse areas such as fuzzy control...”

2 “... moved. Non-monotonic logic is now a very major area of philosop- cal logic, alongside default logics...”

3 “... to readers equipped with a modicum of set theory and abstract algebra. Visitors to the area can come...”

4 “..., stimulated by the needs of applications. New logic areas becameestablished and old areas were enriched...”

5 “...This book is indispensable to any advanced student or researcher using logic in these areas...”

6 “... in light of requirements arising from their successful application in areas such as Computer Science and AI...”

7 “... the presentation of various algorithms. The book is suitable for researchers and postgraduates in the areas...”