Premise: Two men are working together on a ladder .
Correct statement: We believe that the ladder is leaning against a wall .
Incorrect statement: There is almost no chance that the ladder is leaning against a wall .
Correct statement: It is impossible that two men build a ladder together .
Incorrect statement: It is likely that two men build a ladder together .
Correct statement: It is impossible that two men try to make repairs so the building can resume its normal operations .
Incorrect statement: Chances are about even that two men try to make repairs so the building can resume its normal operations .
Correct statement: It is probable that two men are repairing something while on a ladder .
Incorrect statement: It is unlikely that two men are repairing something while on a ladder .
Correct statement: Chances are about even that two men are roofing on a ladder
Incorrect statement: It is certain that two men are roofing on a ladder