In The Crucible, certainty can be dangerous as demonstrated by the character of Abigail.
She accused Proctor's wife of being a witch. She testified that she saw the spirit of Proctor's wife and it stabbed her. Even though she lied, her certainty in front of the jury and the towns people convince them that what she said is true and that Proctor's wife is a witch that must be burned to death.
It is also one of the world's most important commercial waterways and one of North America's great migration routes for both birds and fishes. Native Americans lived along its banks and used the river for sustenance and transportation.
