Anchor: More easily, one can imagine nebbishes banding together to promote a nebbish agenda, kvetching that they are systematically discriminated against, demanding Nebbish Studies at universities, and complaining that history textbooks treat them as losers.
Entailed: Nebbishes will work together to further their agenda. 
Contradiction: The nebbish have never existed. 
Contradiction: a little kid goes swimming
Contradiction: A woman is participating in a road race.
Contradiction: No one liked the new massage.
Contradiction: The elderly woman has help as she crosses the street