"A monumental study that sets a new standard for work on learnability."
"The author's arguments are never less than impressive, and sometimes irresistible, such is the force and panache with which they are deployed."
—Paul Fletcher, Times Higher Education Supplement
"Learnability and Cognition is theoretically a big advance, beautifully reasoned, and a gold mine of information."
—Lila Gleitman, University of Pennsylvania