Premise: A young man wears a helmet and protective clothing as he races his dirt bike through a muddy track .
Correct statement: It is impossible that the man is a worker
Incorrect statement: There is a very good chance that the man is a worker
Correct statement: We believe that a dirt biker is competing in a race .
Incorrect statement: There is little chance that a dirt biker is competing in a race .
Correct statement: Chances are about even that a young guy zooms by on his dirt bike because he 's going home
Incorrect statement: There is almost no chance that a young guy zooms by on his dirt bike because he 's going home
Correct statement: It is probably the case that a young man in a bike race rides his dirt bike along a muddy track .
Incorrect statement: We doubt that a young man in a bike race rides his dirt bike along a muddy track .
Correct statement: It is likely that a tall person with a helmet .
Incorrect statement: We doubt that a tall person with a helmet .