 According to the bundle view, objects consist of, are made up by, or are grounded in, a sufficient number of mutually compresent and/or in some other way mutually dependent tropes. What is compresence? When the same question was asked about (exact) resemblance, the trope theorist had the option of treating the relation as a ‘pseudo-addition’. This was because resemblance is an internal relation and so holds necessarily simply given the existence of its relata. According to most trope-theorists, however, compresence is an external relation, and hence a real addition to the tropes it  relates.[33]  But then adding compresence gives rise to an infinite regress (often called ‘Bradley’s regress’ after Bradley 1930[1893]; cf. also Armstrong 1978; Vallicella 2002 and 2005; Schnieder 2004; Cameron 2008; Maurin 2012). Unlike what was true in the case of resemblance, this regress is most likely a vicious regress. This is because the ‘pattern of dependence’ it instantiates is the opposite of that instantiated by the resemblance regress. In the resemblance case, for tropes t1, t2, and t3 to exactly resemble each other, it is enough that they exist. Not so in the compresence case. Tropes t1, t2, and t3 could exist and not be compresent, which means that in order to ensure that they are compresent, a compresence-trope, c1, must be added to the bundle. But c1 could exist without being compresent with those very tropes. Therefore, in order for t1, t2, t3 and c1 to be compresent, there must be something—call it c2—that makes them so. But since c2 could exist and not be compresent with t1, t2, t3 and c1, it too needs something that ensures its compresence with those entities. Enter c3. And so on. The existence of this regress arguably contradicts—and hence functions as a reductio against—the compresence of the original (first-order) tropes and, thereby, the (possible) existence of the concrete particular.