Premise: A crowd of people stand talking in a business district .
Correct statement: It is impossible that they are discussing a public speaker .
Incorrect statement: We believe that they are discussing a public speaker .
Correct statement: It is impossible that a crowd of people talking as they wait for a concert in a business district
Incorrect statement: There is a better than even chance that a crowd of people talking as they wait for a concert in a business district
Correct statement: It is highly likely that a crowd of business people stand in a business district .
Incorrect statement: It is probably not the case that a crowd of business people stand in a business district .
Correct statement: It is almost certain that there is a crowd of people standing outside
Incorrect statement: We doubt that there is a crowd of people standing outside
Correct statement: Chances are about even that a couple of people are outside
Incorrect statement: It is highly unlikely that a couple of people are outside