other person that was hiding pops out and they're kind of at a similar velocity and so the the things you're combining are like where are they their positions they're their velocities someone's unlikely to just suddenly stop but it can happen and then they're like estimate the visual estimate of their by appearance which we do with with deep networks and so in this case the the visual estimate is similar enough that like the chance of one person disappearing and another appearing and then being at the same velocity is like