 This cognitivist orientation is of special interest to philosophers, in so far as such an examination provokes questions concerning the ontological status of intentionality, the role of representation, and the character of cognitive processing in general. Indeed, immunology’s cognitive models carry the promise of revitalizing some of the key issues prevalent in cognitive science by placing them into the context of a system whose circulating components interact in a probabilistic manner (Varela et al. 1988; Tauber 2017: 129–161; Cohen 2000: 57–99). Such a “fluid brain” carries wide-ranging theoretical implications (Fridman 1991).