Hilary Putnam deals in this book with some of the most fundamental persistent problems in philosophy: the nature of truth, knowledge and rationality. His aim is to break down the fixed categories of thought which have always appeared to define and constrain the permissible solutions to these problems.
From the Back Cover
'This is a timely book, with penetrating discussion of issues very much in the forefront of the contemporary philosophy. Despite the prominence of negative arguments it contains much to contribute positively to our understanding of what is needed for a conception of rationality and objectivity that covers ethics and value theory generally as well as physics.'