A dirt bike racer rides number 63 across a dirt path in the woods .
It is unlikely that a rider is in the lead in the dirt bike race on bike 63 .
It is probable that a rider is in the lead in the dirt bike race on bike 63 .
It is unlikely that a rider is in the lead in the dirt bike race on bike 63 .
A rider is in the lead in the dirt bike race on bike 63 .