Premise: Workers wearing reflective vests working near a train car .
Correct statement: There is a very good chance that reflective vests on workers make them visible to the approaching train while they work on a train car .
Incorrect statement: Chances are slight that reflective vests on workers make them visible to the approaching train while they work on a train car .
Correct statement: We doubt that workers wear reflective vests near trains as part of a training exercise .
Incorrect statement: We believe that workers wear reflective vests near trains as part of a training exercise .
Correct statement: There is a very good chance that the workers work for a railroad .
Incorrect statement: We doubt that the workers work for a railroad .
Correct statement: It is likely that people fixing a train track .
Incorrect statement: It is impossible that people fixing a train track .
Correct statement: We believe that the workers are working on the train tracks .
Incorrect statement: It is unlikely that the workers are working on the train tracks .