A Formal Tbeory of Perception

ACKNOWLEOOMENTS I wish to express my special gratitude to Professor Patrick Suppes, who formulated the problems I worked on, and whose advice, guidance and encouragement at all stages of this work was invaluable. I also want to thank the other members of the reading committee, Professor ~oravcsik and Professor Hintikka, whose criticisms and suggestions were extremely useful, George Huff, who made large contributions to this work, particularly in the early stages of the research, and ~ wife, Nola, whose encouragement and typing skill made this work easier and more enjoyable.