 Weiland and Betti (2008) on the one hand, and Maurin (2010) on the other, have argued for relata-specific relations as unifiers of tropes in trope bundles (Weiland and Betti hint at a possible extension of this idea to relations unifying particulars and universals in states of affairs). They have argued that the relational trope of compresence construed as asymmetrically dependent on specific relata is the way to solve the Bradleyean unity problem. It is part of the very nature of the relation of compresence to relate specific relata; thus, there would be a different compresence trope for each specific bundle of tropes. As Weiland and Betti put it: 