Unless I interpret them, they are just a bunch of meaningless symbols. Whatever the representation, it's organised hierarchically. Closely related concepts are also activated. Hard to say, until someone specifies the device that contains all this propositional stuff, and shows what it can do with it. Pylyshyn would want to deny that.
Sensory information comes in, alright, but cognition only begins where it turns into propositions.
So sensorimotor systems are not cognitive systems.