Premise: A young man in a subway walking .
Correct statement: It is likely that a young man is walking to catch a subway car .
Incorrect statement: It is probably not the case that a young man is walking to catch a subway car .
Correct statement: It is probably not the case that a young man is walk through the subway to get to his train .
Incorrect statement: It is certain that a young man is walk through the subway to get to his train .
Correct statement: It is likely that a man has gone down some stairs .
Incorrect statement: It is probably not the case that a man has gone down some stairs .
Correct statement: It is highly likely that a young man in a trait station .
Incorrect statement: We doubt that a young man in a trait station .
Correct statement: It is probable that a young man in a subway walking to catch the next subway car .
Incorrect statement: It is highly unlikely that a young man in a subway walking to catch the next subway car .