Cambridge change

A Cambridge change occurs when a predicate P is true of object O at this moment (Chicago is north of me) but is not true of O the next moment (Chicago is south of me), not because O's bodily constitution is no longer the same, but because some difference in the constitution of an object G (I have moved from Atlanta to Toronto) makes logically necessary the passage of the original predicate from true to not true.

Cambridge change

A Cambridge change occurs when a predicate P is true of object O at this moment (Chicago is north of me) but is not true of O the next moment (Chicago is south of me), not because O's bodily constitution is no longer the same, but because some difference in the constitution of an object G (I have moved from Atlanta to Toronto) makes logically necessary the passage of the original predicate from true to not true.