Premise: A man wearing a backpack is climbing a rock .
Correct statement: It is probable that an experienced rock climber is scaling a rock with his equipment on his back .
Incorrect statement: We doubt that an experienced rock climber is scaling a rock with his equipment on his back .
Correct statement: It is almost certain that the man is outside .
Incorrect statement: It is unlikely that the man is outside .
Correct statement: Chances are about even that a man is climbing while his friend looks on .
Incorrect statement: There is almost no chance that a man is climbing while his friend looks on .
Correct statement: There is little chance that a man is wearing a new backpack .
Incorrect statement: It is certain that a man is wearing a new backpack .
Correct statement: Chances are about even that the man is wearing a hat .
Incorrect statement: It is impossible that the man is wearing a hat .