Premise: A group of women dressed in black playing musical instruments in front of a large building .
Correct statement: There is almost no chance that a group of women are performing a free concert .
Incorrect statement: There is a better than even chance that a group of women are performing a free concert .
Correct statement: It is impossible that a group of women performs a rock ballad
Incorrect statement: We believe that a group of women performs a rock ballad
Correct statement: We doubt that a group of women play string instruments .
Incorrect statement: It is likely that a group of women play string instruments .
Correct statement: It is impossible that the BSO plays a free concert
Incorrect statement: We believe that the BSO plays a free concert
Correct statement: It is impossible that a group of women are in mourning .
Incorrect statement: It is certain that a group of women are in mourning .