Chapter one introduces the whole book by showing that even sence experience is highly inferencial. Chapter two talks about how human language could have come out of animal communication. If shows that the two are not the same.
Animal communication is like computer instructions.
Human communication involves interpretations we make on any recieved sentence or just a word from a fellow human being. As a quicky he notes how we are able to take the emotional charge away from the message and think about it before making a hasty reply or decision. Chapters three and four deal with science a lot more. He was into formal logic research back in the early 1900's. He was beaten to his researches by a man named Kurt Godel.