Premise: A varied crowd mills about ( or rough-houses ) on a public street , with lots of bicycles on display .
Correct statement: Chances are about even that the people are at a bike race .
Incorrect statement: It is almost certain that the people are at a bike race .
Correct statement: It is impossible that the crowd is angry
Incorrect statement: It is probable that the crowd is angry
Correct statement: It is impossible that a crowd holds up picket signs .
Incorrect statement: There is a very good chance that a crowd holds up picket signs .
Correct statement: It is impossible that people fight for the best bicycles
Incorrect statement: We believe that people fight for the best bicycles
Correct statement: It is impossible that two men fight each other for posession of a bike .
Incorrect statement: It is certain that two men fight each other for posession of a bike .