 As discussed above, the term ’reduction’ can be interpreted in many ways. These rival explications can be distinguished (i) with respect to how they conceive of the relata of the reduction relation, and (ii) with respect to how they conceive of the conditions the relevant relata have to meet in order to instantiate the relation. Often, an epistemic aspect complements these characterizations. This section groups the rival accounts with respect to the objects they offer as candidate relata, and with respect to the links they offer as candidates for the conditions the relata have to meet in order to instantiate the reduction relation. Three remarks are in place: 