Premise: A man performing for a crowd .
Correct statement: It is highly unlikely that a man performs a juggling act for a crowd .
Incorrect statement: It is certain that a man performs a juggling act for a crowd .
Correct statement: We doubt that a man is singing for a crowd .
Incorrect statement: There is a very good chance that a man is singing for a crowd .
Correct statement: Chances are about even that the crowd likes the man
Incorrect statement: It is highly unlikely that the crowd likes the man
Correct statement: It is probably not the case that a juggler is on the street performing .
Incorrect statement: It is probably the case that a juggler is on the street performing .
Correct statement: It is highly unlikely that a man performing for a crowd by juggling balls
Incorrect statement: It is probably the case that a man performing for a crowd by juggling balls