Premise: A snowboarder leaves a trail of snow on the mountain .
Correct statement: It is impossible that the snowboarder fell down the mountain
Incorrect statement: There is a better than even chance that the snowboarder fell down the mountain
Correct statement: It is impossible that the snowboarder is on his way to the top of the mountain .
Incorrect statement: There is a very good chance that the snowboarder is on his way to the top of the mountain .
Correct statement: It is certain that the snow on the ground is white .
Incorrect statement: It is probably not the case that the snow on the ground is white .
Correct statement: It is improbable that the snowboarder is a professional .
Incorrect statement: It is highly likely that the snowboarder is a professional .
Correct statement: It is highly likely that the mountain is covered in snow .
Incorrect statement: It is highly unlikely that the mountain is covered in snow .