Premise: a man walking down an alleyway
Correct statement: It is impossible that the man is a police officer .
Incorrect statement: There is a better than even chance that the man is a police officer .
Correct statement: It is impossible that a man is looking for a victim .
Incorrect statement: It is probable that a man is looking for a victim .
Correct statement: It is certain that a man is walking .
Incorrect statement: It is highly unlikely that a man is walking .
Correct statement: It is probably not the case that a policeman walks down an alleyway .
Incorrect statement: It is probably the case that a policeman walks down an alleyway .
Correct statement: There is a very good chance that a man taking a shortcut through an alleyway .
Incorrect statement: It is highly unlikely that a man taking a shortcut through an alleyway .