New York, Oxford Oxford University Press, 1997<br /><br />https://books.google.com/books?id=RRr1aX3W9e0C&printsec=frontcover#PP... /><br />ISBN - 13 978-0-19-511551-2<br />
"I have approximate answers and possible beliefs and different degrees of certainty about different things, but I'm not absolutely sure of anything..." (Richard Feynman)