Anchor: During the millennium before the Christian era, their civilization reached north beyond Tuscany to the Po valley and south toward Naples.
Entailed: Their civilization thrived before the Christian era.
Contradiction: Their civilization never reached Naples.
Contradiction: Congressmen usually travel by train.
Contradiction: Zero net investment is when gross investment is only enough to replace depreciated capital.
Contradiction: A man is standing at an open front door.
Contradiction: Several people are riding bikes.