You mean the separation between the patterns? The problem I have here, and what lead me to movement, was reflection, and/or cause and effect. What is not a ripple in the pond? I'll admit that 'movement that doesn't reflect the mechanism of motion' probably falls short, but the 'doesn't reflect the mechanism of motion' is a partition of sorts. Maybe just one that isn't inclusive enough. See what I mean about a rabbit hole? But you said 'cleaving', and that suggests to me action. As if cognition is (or is the result of) the action of separation between the two patterns, making the external and the internal? How could that be defined? What makes my brain not a pond? :) My actions don't look like the effect of a pebble drop, but where does the disengagement occur? Or does it? Could it be a sufficiently obscuring complexity that depends on not just the perceived actor, but the observer? Is cognition in the eye of the beholder?