Anchor: It's worth taking a day's drive or a few days of walking to seek them out.
Entailed: It's worth taking few days of walking or a day's drive to seek them out.
Contradiction: It's not worth taking a day's drive to seek them out.
Contradiction: A man scuba dives in the Atlantic.
Contradiction: A man is skateboarding.
Contradiction: It still exists today.
Contradiction: Two kids are in ground