When Wanda is 14, she asks Yugo Amaryl about how psychohistory is developing. Amaryl shows her the Prime Radiant, a device that displays all the psychohistory equations. Wanda points to a certain set of equations and says it does not look right. Yugo finds it was indeed wrong, and Hari Seldon deduces that Wanda had somehow read Amaryl's mind. He conceives the idea of a Second Foundation, whose power would lie in its telepathic power, referred to as mentalic ability, and anonymity.