[quote=@Dynamics] "Stereotype." That's like saying human memories are a stereotype. But regardless, we can analyze that. What if a particle is kept frozen in space? That remains unchanged. Or if it's moving through space forever. Nothing is changing, unless you count its position. But position is a human concept anyway. [/quote] I can. If a particle is frozen in space, then nothing is happening. Motion is a constant change, so I don't see why that can't be considered one.