Premise: A man in a red shirt is sitting by fruit for sale .
Correct statement: We doubt that a man is selling apples .
Incorrect statement: We believe that a man is selling apples .
Correct statement: Chances are about even that a man is selling some fruit to customers .
Incorrect statement: It is certain that a man is selling some fruit to customers .
Correct statement: We doubt that a man is sitting by apples for sale
Incorrect statement: It is probably the case that a man is sitting by apples for sale
Correct statement: It is probably not the case that the man is selling the fruits at a stall .
Incorrect statement: It is certain that the man is selling the fruits at a stall .
Correct statement: Chances are about even that the man is selling his favorite fruit .
Incorrect statement: It is certain that the man is selling his favorite fruit .