Text: A trip to remote Hardknott Fort, which protected the route through Eskdale and Hardknott Pass, provides a stark impression of what the invaders from the south were up against.
Entailment: When traveling to Hardknott Fort, there is an impression of what the invaders from the south were up against.
Contradiction: There are no people who would try to take over Hardknot Fort because of how remote it was.