Premise: A man is operating a piece of machinery .
Correct statement: It is impossible that a person is operating a noisy , blue machine .
Incorrect statement: It is certain that a person is operating a noisy , blue machine .
Correct statement: It is probable that some men are working on a machine
Incorrect statement: It is impossible that some men are working on a machine
Correct statement: It is highly likely that at his job the man operates a piece of machinery .
Incorrect statement: Chances are slight that at his job the man operates a piece of machinery .
Correct statement: It is impossible that a man operates a piece of machinery on his last day of employment .
Incorrect statement: There is a very good chance that a man operates a piece of machinery on his last day of employment .
Correct statement: There is a very good chance that the machinist is doing his job .
Incorrect statement: There is little chance that the machinist is doing his job .