A person in a red and black jacket with a black backpack scales a mountain face .
It is likely that one wearing a jacket with a backpack on his back is climbing the North face of the mountain .
It is likely that one wearing a jacket with a backpack on his back is climbing the North face of the mountain .
There is almost no chance that one wearing a jacket with a backpack on his back is climbing the North face of the mountain .
One wearing a jacket with a backpack on his back is climbing the North face of the mountain .