Anchor: It's possible to spend hours browsing for the perfect souvenir.
Entailed: There is a chance to take hours locating the perfect souvenir.
Contradiction: There is no perfect souvenir to be found.
Contradiction: The SSA is not able to use online data due to security breaches. 
Contradiction: One replenishes what the other spent.
Contradiction: The little girl is skating.
Contradiction: Sandy beaches ate more fun to walk oh than pebble stones.