Which logical fallacy is used in the text?
Don't try to tell me that you only watch educational programming, Bridgette! I know for a fact that your sister only watches reality television.

 - bandwagon fallacy: the assumption that the popular choice is automatically correct
 - guilt by association: a negative association intended to discredit someone or something
The text argues that Bridgette must watch reality television, because her sister watches reality television. However, even though Bridgette's sister watches reality television, that doesn't necessarily mean that Bridgette does, too. This illustrates a type of logical fallacy known as guilt by association.