Premise: A skier going down the snowy hill .
Correct statement: It is impossible that an olympic athlete practices .
Incorrect statement: There is a better than even chance that an olympic athlete practices .
Correct statement: It is likely that a skier going down his favorite snowy hill .
Incorrect statement: It is impossible that a skier going down his favorite snowy hill .
Correct statement: We believe that an athlete in a downhill skiing competition .
Incorrect statement: Chances are slight that an athlete in a downhill skiing competition .
Correct statement: It is highly likely that the whole hill is filled with white snow .
Incorrect statement: We doubt that the whole hill is filled with white snow .
Correct statement: It is impossible that the skiier is holding blue ski poles .
Incorrect statement: It is almost certain that the skiier is holding blue ski poles .