Premise: A man is using a jackhammer to work on a sidewalk .
Correct statement: It is highly likely that a construction worker is breaking up concrete .
Incorrect statement: It is impossible that a construction worker is breaking up concrete .
Correct statement: There is a very good chance that the man has cracked through the sidewalk with his jackhammer .
Incorrect statement: It is highly unlikely that the man has cracked through the sidewalk with his jackhammer .
Correct statement: It is impossible that a man is getting ready to take a lunch break .
Incorrect statement: There is a better than even chance that a man is getting ready to take a lunch break .
Correct statement: There is a very good chance that a man breaks concrete .
Incorrect statement: We doubt that a man breaks concrete .
Correct statement: It is likely that a man is removing the sidewalk .
Incorrect statement: It is improbable that a man is removing the sidewalk .