Premise: A man putting shingles on a roof .
Correct statement: Chances are about even that the roof was leaking
Incorrect statement: It is certain that the roof was leaking
Correct statement: There is a better than even chance that a man is on a ladder with a hammer .
Incorrect statement: Chances are slight that a man is on a ladder with a hammer .
Correct statement: There is almost no chance that a man is repairing his roof after the storm .
Incorrect statement: It is almost certain that a man is repairing his roof after the storm .
Correct statement: Chances are about even that a person is fixing his own roof
Incorrect statement: It is certain that a person is fixing his own roof
Correct statement: There is a better than even chance that a man is repairing his roof .
Incorrect statement: It is impossible that a man is repairing his roof .