True or False: Mary knows about the affair between Abigail and John.

Mary Warren is aware of the affair between Abigail Williams and John Proctor. Their illicit relationship is a central element in the play, and Mary, as a member of the group of girls who have been engaging in the witch trials, knows about the previous romantic involvement. This knowledge is important as it impacts her actions and choices throughout the narrative. For example, Mary's awareness of the affair plays a role when she is put in a position of conflict between her loyalty to Abigail and her allegiance to John Proctor. This tension drives much of the drama in the story, as Abigail's motivations are heavily influenced by her desire to be with John, making Mary's understanding particularly significant in the unfolding events of the play.