What is Truth?

In this scene from the movie Contact, Ellie Arroway (played by Jodie Foster) is trying to convince a panel that she actually met aliens even though she has no scientific proof. It creates a crisis for her, because all of her life she has subscribed to the principle that truth can only be known through the scientific method. In this scene, her same words are used against her.

Watch the clip and journal about any impressions it raises.