Anchor: As she opened the door and stood aside to let him pass out, he stopped in the doorway.
Entailed: He did not walk through the door completely, instead stopping in the doorway while she stood aside and waited.
Contradiction: She opened the door, and he passed through quickly, without stopping.
Contradiction: Nothing happened.
Contradiction: A guy stares at a person whose sight is blocked.
Contradiction: You will find out less that way. 
Contradiction: Social Security also affects people's incentives to save for retirement.