Thacker and Metcalfe, he said later, were locked in what he called a Class One disagreement. “That’s when two people disagree and neither can explain to the other person’s satisfaction that other person’s point of view,” he said. “A Class Two disagreement is when each can explain to the other’s satisfaction the other’s point of view. Class Two disagreements enable people to work together even when they disagree. Class One is destructive.
