Premise: A worker making sure his machine is working correctly .
Correct statement: Chances are about even that a worker pulls a lever on a machine .
Incorrect statement: There is almost no chance that a worker pulls a lever on a machine .
Correct statement: It is improbable that a construction worker inspects his bulldozer .
Incorrect statement: It is probably the case that a construction worker inspects his bulldozer .
Correct statement: There is a better than even chance that a worker tweaks his machine to adjust something to make sure it works properly .
Incorrect statement: It is impossible that a worker tweaks his machine to adjust something to make sure it works properly .
Correct statement: There is a better than even chance that the worker and the machine are outdoors .
Incorrect statement: It is impossible that the worker and the machine are outdoors .
Correct statement: It is probably not the case that a worker is tired .
Incorrect statement: It is probable that a worker is tired .