A man mows the lawn at an orchard , careful to avoid the hedges and flowers on either side of him .
Chances are about even that the caretaker uses the riding lawn mower to cut the grass .
Chances are about even that the caretaker uses the riding lawn mower to cut the grass .
It is impossible that the caretaker uses the riding lawn mower to cut the grass .
The caretaker uses the riding lawn mower to cut the grass .