I can't think of any reason for a blanket statement like that. Don't know what this "Complete" book is, but if you have a book that makes claims like this without explaining them, I'd use it for kindling.
If the book includes an explanation and you'd like help understanding it, please share it with us!
Well the statement is incorrect in case if he has written such. If you don't believe write a short program to prove your point.
Also can you please mentioned the Page No. in which you came across the statement.
Have the determination of mirror which never fails to reflect in spite of being broken into pieces.<br /> <br />Kiss the hands you cannot bite.<br /> <br />An Optimist is one who starts taking a bath when he accidentally falls into the water.