Premise: Men wearing hard hats and safety vests are working .
Correct statement: It is certain that people wearing hats and vests are working .
Incorrect statement: We doubt that people wearing hats and vests are working .
Correct statement: It is probably not the case that some men are building a house .
Incorrect statement: It is certain that some men are building a house .
Correct statement: It is certain that men are working and wearing safety gear .
Incorrect statement: It is unlikely that men are working and wearing safety gear .
Correct statement: It is almost certain that the men are construction workers .
Incorrect statement: It is unlikely that the men are construction workers .
Correct statement: It is unlikely that the men are building a house
Incorrect statement: We believe that the men are building a house