Premise: A mountain climber scales a steep rock face .
Correct statement: It is almost certain that the mountain climber is being supported by ropes .
Incorrect statement: It is probably not the case that the mountain climber is being supported by ropes .
Correct statement: It is impossible that a climber ascends K2
Incorrect statement: There is a very good chance that a climber ascends K2
Correct statement: Chances are about even that a bearded man is climbing a mountain .
Incorrect statement: It is almost certain that a bearded man is climbing a mountain .
Correct statement: It is impossible that a man scaling Mount Everest .
Incorrect statement: It is probable that a man scaling Mount Everest .
Correct statement: It is almost certain that a mountain climber is trying to reach the top of a mountain .
Incorrect statement: It is impossible that a mountain climber is trying to reach the top of a mountain .