Possibility and NecessityPossibility and Necessity was first published in 1987. Minnesota Archive Editions uses digital technology to make long unavailable books once again accessible, and are published unaltered from the original University of Minnesota Press editions. This two volume workJean Piaget's lastwas published in France in 1981 and 1983 and is available now for the first time in English translation. Reflecting the preoccupations and methodologies of his later