Consider the following state aliased grid-world:
In the previous diagram, we see there are eight states, where two states with reward -10 are bad states to avoid and there's one state with reward 10 is a good state and also the goal state. However, our major concerns are the gray-shaded states, where the agent can't differentiate between these two states as they share the same features.
Say, the feature for any state s be 
and actions are North, East, West, and South.
Considering these features, let's compare ...
