Anchor: Frontier etiquette was different from Kentucky custom; it was safer to be quiet when not sure.
Entailed: It was safe to be quiet when not sure, as the frontier etiquette was different from Kentucky custom.
Contradiction: Kentucky custom was the same as frontier etiquette.
Contradiction: The woman is flying an airplane.
Contradiction: At least two, maybe even more, of the above.
Contradiction: A couple is at a Christmas parade.
Contradiction: A man is skateboarding.