Premise: Two monks are walking down steep stairs .
Correct statement: It is impossible that two monks on their way to prayer services .
Incorrect statement: It is probable that two monks on their way to prayer services .
Correct statement: There is a better than even chance that two monks wearing robes are seen walking down the monestary stairs .
Incorrect statement: There is almost no chance that two monks wearing robes are seen walking down the monestary stairs .
Correct statement: There is a better than even chance that the monks are old
Incorrect statement: It is highly unlikely that the monks are old
Correct statement: It is impossible that the monks are leaving the church .
Incorrect statement: It is certain that the monks are leaving the church .
Correct statement: It is impossible that the stairs are icy .
Incorrect statement: It is certain that the stairs are icy .