Premise: a sparsely-populated arcade with many brightly lit games and a few people sprinkled around .
Correct statement: We believe that there are boys at the arcade .
Incorrect statement: It is improbable that there are boys at the arcade .
Correct statement: It is impossible that a customer is aiming a gun in a shooting game with targets .
Incorrect statement: It is highly likely that a customer is aiming a gun in a shooting game with targets .
Correct statement: It is impossible that a nearly empty arcade is getting ready to close .
Incorrect statement: It is probable that a nearly empty arcade is getting ready to close .
Correct statement: It is impossible that after the evacuation , the arcade has few customers .
Incorrect statement: It is likely that after the evacuation , the arcade has few customers .
Correct statement: It is impossible that everybody left the arcade
Incorrect statement: Chances are about even that everybody left the arcade