Premise: A repairman is working on a train .
Correct statement: It is highly unlikely that a man is working on an old , beat up train .
Incorrect statement: It is certain that a man is working on an old , beat up train .
Correct statement: There is a very good chance that the repairman is doing some preventative maintenance to the train .
Incorrect statement: It is impossible that the repairman is doing some preventative maintenance to the train .
Correct statement: There is almost no chance that a man is repairing a steam engine .
Incorrect statement: It is probable that a man is repairing a steam engine .
Correct statement: It is impossible that some people repairing the train .
Incorrect statement: It is likely that some people repairing the train .
Correct statement: There is almost no chance that the train is broken down and the passengers are waiting .
Incorrect statement: Chances are about even that the train is broken down and the passengers are waiting .