Premise: A construction worker standing on the roof of a house wearing an orange vest with a yellow hard hat .
Correct statement: We believe that a worker is repairing a roof .
Incorrect statement: It is probably not the case that a worker is repairing a roof .
Correct statement: It is impossible that a number of canines are playing fetch .
Incorrect statement: Chances are about even that a number of canines are playing fetch .
Correct statement: It is probably not the case that a worker going over building plans with his crew .
Incorrect statement: It is almost certain that a worker going over building plans with his crew .
Correct statement: It is unlikely that a construction worker is about to take a lunch break .
Incorrect statement: There is a very good chance that a construction worker is about to take a lunch break .
Correct statement: Chances are about even that the man stands on the roof looking for a leak .
Incorrect statement: It is highly unlikely that the man stands on the roof looking for a leak .