 To provide a distinct view of the immune system’s role in diachronic identity, Pradeu advocates the so-called “genidentity” view (Pradeu 2018). On this view, two objects are identical if their states are continuously connected over time (Lewin 1922). To specify which continuous states ensure temporal identity of an organism, Pradeu refers to those “immune interactions [that] isolate some continuous biochemical interactions, which in turn individuate the organism” (Pradeu 2012: 248–249). Accordingly, the immune system reacts to rapid molecular alterations in the pattern of biochemical interactions and thus helps to ensure that these interactions are continuous and unperturbed. Of note, which continuous process should be followed to define diachronic identity is not observer independent and must be adjusted to a particular theoretical perspective (Guay and Pradeu 2016: 318; Pradeu 2018).