Cambridge change a non-genuine change. If I turn pale, I am changing, whereas your turning pale is only a Cambridge change in me. When I acquire the property of being such that you are pale, I do not change. In general, an object’s acquiring a new property is not a sufficient condition for that object to change (although some other object may genuinely change). Thus also, my being such that you are pale counts only as a Cambridge property of me, a property such that my gaining or losing it is only a Cambridge change. Cambridge properties are a proper subclass of extrinsic properties: being south of Chicago is considered an extrinsic property of me, but since my moving to Canada would be a genuine change, being south of Chicago cannot, for me, be a Cambridge property. The concept of a Cambridge change reflects a way of thinking entrenched in common sense, but it is difficult to clarify, and its philosophical value is controversial. Neither science nor formal semantics, e.g., supports this viewpoint. Perhaps Cambridge changes and properties are, for better or worse, inseparable from a vague, intuitive metaphysics. See also PROPERTY, TIME. S.J.W.