Anchor: Whether the northern tribes made the pass difficult to defend by their constant raiding is still debated by scholars, but it is known that the local inhabitants weren't willing to give the Romans free rein over the whole territory.
Entailed: Scholars are still debating whether the northern tribes raided to make the pass difficult to defend.
Contradiction: Scholars are certain that northern tribes made the pass difficult to defend by their constant raiding.
Contradiction: the man is cleaning out his gutters
Contradiction: Charles had a son named Felipe II.
Contradiction: A union was established under Eleftherios Venizelos in 1598.
Contradiction: Severn talked to the four old men.