 Finally, Nagel’s model has been criticized for the role it attributes to bridge-laws. New Wave reductionists in particular have argued that bridge-laws do not play the role they are supposed to play in discovering reduction-relations. Contrary to Nagel, we do not use bridge-laws when discovering for example that parts of chemistry reduce to atomic physics. Rather, we infer bridge-laws from the discovery of relevant similarities between the two theories (for the explanatory role of bridge-laws and identity statements, see also Marras (2005: 351) and Block &amp; Stalnaker (1999: 28)).