In all areas of life, we receive and provide information. Making a decision based on bad information can lead to disaster. How can we determine the validity of a piece of data? We try to evaluate the people who provide us with information. Are they usually accurate, seldom accurate, or rarely accurate. Although this can assist us in understanding the validity of provided information, it is still a weak understanding.

This book proposes that we apply measurements to the certainty that accompanies information. A process using these measurements is proposed to clarify the probability that this information is correct and, hence, enables us to make better decisions.