A young man in a blue sweater cleaning fish while three other men watch , one a man a cigarette , or match in his month .
It is certain that the three men watching do not know how to clean a fish .
There is almost no chance that the three men watching do not know how to clean a fish .
It is certain that the three men watching do not know how to clean a fish .
The three men watching do not know how to clean a fish .