There is no objective reality independent of an observer: we construct our own reality. This central premise of "constructivism" is the theme of this book dealing with the ideas of Heinz von Foerster, one of its founders. "This book presents in thoroughly clear manner Heinz von Foerster's important - albeit difficult - fundamental idea: constructivism. I was most excited by the discussion of von Foerster's theory of reality. All those who would like...