 The second distinction we need is between thick and thin relations (Mulligan 1998: 342–7). Some examples. Thick relations: loves, kills, gives. Thin relations: identity, resemblance, greater than. Thick relations have more of a “material” content and are less “formal” than thin relations. It correspondingly makes more sense to think of thick relations as “topic-neutral”. Thin relations, by contrast to thick relations, are typically internal (see Clementz 2014 and Johansson 2014 for further discussion of the thick/thin distinction).