Doctor Odd watched the mice scurry around the maze, trying to find the source of the scent of cheese.
Unlike other mazes, there was no "center" or "goal" to this one. It was just a series of loops.
And as for the cheese, well, he had smeared the walls and floors of the maze with a cloth containing a cheese scent an hour before.
The mice kept going in circles, and Doctor Odd waited for one to just give up.
Sure enough, the mice were poking their noses through the mesh on top of the maze.
They'd learned to fail.