We quickly adopted a practice that we maintained for man y years. Our research was a conversation, in which we invented questions and jointly examined our intuitive answers. Each question was a smal experiment, and we carried out many experiments in a single day. We were not seriously looking for the correct answer to the statistical questions we posed. Our aim was to identify and analyze the intuitive answer, the first one that came to mind, the one we were tempted to make even when we knew it to be wrong. We believed—correctly, as it happened—that any intuition that the two of us shared would be shared by many other people as wel, and that it would be easy to demonstrate its effects on judgments.