In the men's curling event at the 2014 Winter Olympics in Sochi, both Team A and team B are in the top eight Regarding A, B two teams whether can win the medal finally, has the following affirmation  I  At least one of the two teams A and B will win the medal  2  Team A does not necessarily win medals  3  Team B won the medal Iv
It is impossible for team A not to win a medal
Both teams A and B won medals.