Professor of Education Joseph Tobin theorizes that the success of the franchise was due to the long list of names that could be learned by children and repeated in their peer groups. Its rich fictional universe provides opportunities for discussion and demonstration of knowledge in front of their peers. The names of the creatures were linked to its characteristics, which converged with the children's belief that names have symbolic power. Children can pick their favourite Pokémon and affirm their individuality while at the same time affirming their conformance to the values of the group, and they can distinguish themselves from others by asserting what they liked and what they did not like from every chapter. "Pokémon" gained popularity because it provides a sense of identity to a wide variety of children, and lost it quickly when many of those children found that the identity groups were too big and searched for identities that would distinguish them into smaller groups.