According to the error theory, normative judgments are beliefs that ascribe normative properties, but these properties do not exist. Some philosophers think, however, that a belief in the error theory itself constitutes a counterexample to (B4). It is often suggested that the arguments for a moral error theory actually support an error theory about all normative judgments, and this is often taken to be an objection to moral error theories. But since Fred is trying to believe the error theory, he is explicitly thinking about this theory. Children and young adults are instructed with the teachings of the error theory. Hyun and Sampson suggest that coming close to believing the error theory in this way may make people believe a moral error theory. They write that a way to come close to believing the error theory is to believe those theses that are parts of the error theory, and surely moral error theory is a part of the error theory.