An exploration of the role of fuzzy logic in chemistry providing theoretical background as well as descriptions of practical applications in all the significant areas of chemical application. The nine contributing research chemists explain the foundations of fuzzy logic and its growing importance in the physical sciences, describe molecular size and shape, define chemical concepts such as chirality and the role of quantum-chemical species and systems, and outline the engineering of molecular species, including drug design. The volume features a foreword written by the founder of fuzzy logic, Lotfi A. Zadeh, University of California, Berkeley.