Premise: Two feet wearing yellow ski boots on ski
Correct statement: It is impossible that the ski boots were a precaution but not necessary feet attire .
Incorrect statement: There is a better than even chance that the ski boots were a precaution but not necessary feet attire .
Correct statement: It is improbable that a person is learning how to ski downhill .
Incorrect statement: We believe that a person is learning how to ski downhill .
Correct statement: It is probably not the case that tall people with boots
Incorrect statement: It is certain that tall people with boots
Correct statement: Chances are slight that a competition skier straps in
Incorrect statement: It is almost certain that a competition skier straps in
Correct statement: It is certain that the feet belong to a person
Incorrect statement: It is improbable that the feet belong to a person