The perceptual symbol system view assumes that perceptual representations h
ave a role-argument structure. A role argument structure is often incorpora
ted into amodal symbol systems in order to explain conceptual functions lik
e abstraction and rule use. The power of perceptual symbol systems to suppo
rt conceptual functions is likewise rooted in its use of structure. On Bars
alou's account, this capacity to use structure (in the form of frames) must
be innate.