I think a distinction needs to be made. The anti-object seems to provide the environment in which the object moves. I don't think the point is for there to be

I think a distinction needs to be made. The anti-object seems to provide the environment in which the object moves. I don't think the point is for there to be absolutely no logic in the object itself, the logic should merely be simplified. On the contrary, the ghost object in this example still has to implement the hill climbing algorithm. It could go down the hill (as it would do if pac man got one of the super pellets), or it could ignore the hill altogether. I think this also implies that it could avoid collisions with other ghosts, or even avoid grouping with other ghosts by paying attention to their scent as well. Seems like it would be trivial for a tile to further provide the scent value for all interesting objects in the maze.