Level I. You don’t know who Dilbert is or don’t visit dilbert.com.
Perhaps you haven’t worked yet, like, working for money. Or you are extremely lucky with your first job(s).
Level II. You read dilbert.com and laugh.
You have seen something like this at work. These situations are funny exceptions, aren’t they?
Level III. You read dilbert.com and don’t laugh
At work, you jump from one Dilbert moment directly to another one.
Level IV. You start thinking you can make it funnier than Scott Adams and create your first mashup: http://dilbert.com/mashups/comic/123054/