Premise: A man who 's head and face is covered is walking with a rather large weapon on his shoulder .
Correct statement: It is impossible that the man is walking home .
Incorrect statement: It is probably the case that the man is walking home .
Correct statement: It is impossible that a person carries a grenade launcher
Incorrect statement: There is a very good chance that a person carries a grenade launcher
Correct statement: It is impossible that a man is returning a large weapon to its owner .
Incorrect statement: It is probable that a man is returning a large weapon to its owner .
Correct statement: Chances are about even that a man is carrying a rifle .
Incorrect statement: It is highly unlikely that a man is carrying a rifle .
Correct statement: We doubt that the man has a large ammunition clip around his torso .
Incorrect statement: It is certain that the man has a large ammunition clip around his torso .