Premise: A man and a woman , both wearing hiking gear , are standing on the edge of a large canyon .
Correct statement: It is certain that two people are standing outside .
Incorrect statement: We doubt that two people are standing outside .
Correct statement: It is almost certain that a couple take a hike near the edge of a large canyon .
Incorrect statement: We doubt that a couple take a hike near the edge of a large canyon .
Correct statement: It is probably not the case that a man and a woman are at the Grand Canyon .
Incorrect statement: It is almost certain that a man and a woman are at the Grand Canyon .
Correct statement: Chances are about even that the man and woman are married .
Incorrect statement: It is impossible that the man and woman are married .
Correct statement: There is a very good chance that a man and woman are taking pictures of the canyon .
Incorrect statement: We doubt that a man and woman are taking pictures of the canyon .