Premise: Children participate in a game of tug-of-war .
Correct statement: Chances are about even that children play tug-of-war at a school event .
Incorrect statement: It is certain that children play tug-of-war at a school event .
Correct statement: It is impossible that a class of children play tug-of-war against their teachers .
Incorrect statement: There is a better than even chance that a class of children play tug-of-war against their teachers .
Correct statement: Chances are about even that the children on the left are winning .
Incorrect statement: It is impossible that the children on the left are winning .
Correct statement: It is certain that children are playing a game .
Incorrect statement: It is impossible that children are playing a game .
Correct statement: It is likely that some boys are playing tug of war .
Incorrect statement: We doubt that some boys are playing tug of war .