This book is the outgrowth of years of work on propositional attitudes, the hardest problem in semantics. M. J. Cresswell is a logician and philosopher of language who has been a major continuing influence on the growth and development of formal semantics over the past 15 years or more. This book is the outgrowth of years of work on propositional attitudes, the hardest problem in semantics. In it, he traces the problem to the foundations of semantics...