Premise: Young women and men dressed in costumes sitting and standing .
Correct statement: It is probably not the case that people in costumes stand next to some carved pumpkins .
Incorrect statement: It is almost certain that people in costumes stand next to some carved pumpkins .
Correct statement: There is a better than even chance that costumed people await the party .
Incorrect statement: It is improbable that costumed people await the party .
Correct statement: It is probably not the case that women and men are in costumes , posing for a photo .
Incorrect statement: There is a very good chance that women and men are in costumes , posing for a photo .
Correct statement: It is impossible that actors and actresses are visiting together .
Incorrect statement: There is a better than even chance that actors and actresses are visiting together .
Correct statement: It is likely that young women and men are happily dressed in costumes .
Incorrect statement: It is impossible that young women and men are happily dressed in costumes .