Premise: Several costumed people walking down a hall .
Correct statement: There is little chance that the dorm is having a costume party
Incorrect statement: We believe that the dorm is having a costume party
Correct statement: There is a better than even chance that the people are dressed up for a performance .
Incorrect statement: It is impossible that the people are dressed up for a performance .
Correct statement: There is a better than even chance that several costumed people are walking briskly down the hall .
Incorrect statement: Chances are slight that several costumed people are walking briskly down the hall .
Correct statement: It is impossible that the people are dressed as ghosts .
Incorrect statement: It is likely that the people are dressed as ghosts .
Correct statement: It is probably not the case that a costume party is occurring in a hallway .
Incorrect statement: It is certain that a costume party is occurring in a hallway .