Premise: One lonely individual with a yellow backpack and khaki-colored ski pants is crosscountry skiing , high up in the mountains overlooking a large lake .
Correct statement: It is impossible that a man is lost in the wilderness with only his cross country skis and his backpack to sustain him .
Incorrect statement: We believe that a man is lost in the wilderness with only his cross country skis and his backpack to sustain him .
Correct statement: It is impossible that a person is practicing for an upcoming skiing competition
Incorrect statement: It is probable that a person is practicing for an upcoming skiing competition
Correct statement: It is probable that the individual is enjoying the view .
Incorrect statement: It is unlikely that the individual is enjoying the view .
Correct statement: It is certain that one individual has a backpack .
Incorrect statement: It is impossible that one individual has a backpack .
Correct statement: It is unlikely that the mountains are treacherous .
Incorrect statement: It is highly likely that the mountains are treacherous .