A true fan is somebody who agrees completely and rigidly with the viewpoint of the person using the term. Examples: "My point of view is the correct one, and if you disagree with me you're not a true fan, and thus not worthy of my time." "Anyone who likes Beast Machines isn't a true fan." "Anyone who doesn't like Simon Furman isn't a true fan." "Anyone who thinks Rumble is red isn't a true fan." "Anyone who thinks Hot Rod is responsible for Optimus Prime's death isn't a true fan."