 As Vallentyne notes, this definition will not be very enlightening unless we understand the idea of a contraction. This seems related to the objection Langton and Lewis (1998) urge against Vallentyne. They say that Vallentyne’s account reduces to the claim that a property is intrinsic iff possession of it never differs between an object and its lonely duplicates, a claim they think is true but too trivial to count as an analysis. Their position is that we cannot understand contractions without understanding duplication, but if we understand duplication then intrinsicality can be easily defined, so Vallentyne’s theory is no advance.