What do preschool teachers know about infant/toddler care and education? The answer to the question in the title is "Lots!" "if" they are fans of Lilian Katz. The author would not have said that before she sat down to read the new book Lilian wrote with her son Stephen. It's called "Intellectual Emergencies." It starts out with 12 of Lilian's "principles"--a trademark of hers. In order to share these principles, the author presents a discussion in a playroom with four infants, three mothers, and one father.