A man grips onto his walking stick as he hikes the rough terrain .
It is probable that an old man with one wooden leg is holding on tight to his walking stick as he walks through the rough terrain .
It is impossible that an old man with one wooden leg is holding on tight to his walking stick as he walks through the rough terrain .
It is probable that an old man with one wooden leg is holding on tight to his walking stick as he walks through the rough terrain .
An old man with one wooden leg is holding on tight to his walking stick as he walks through the rough terrain .