Often, de jure coreference is understood as an equivalence relation, so in particular it is thought of as a transitive relation. However, Pinillos (Philos Stud 154 (2):301-324, 2011) provides examples ...

Usha Goswami, Transitive Relational Mappings in Three- and Four-Year-Olds: The Analogy of Goldilocks and the Three Bears, Child Development, Vol. 66, No. 3 (Jun., 1995), pp. 877-892 ...