Some young men looking over the edge of a bridge on a sunny day .
Chances are about even that some men are looking over a bridge as one of them falls over and plummets into a river .
It is impossible that some men are looking over a bridge as one of them falls over and plummets into a river .
Chances are about even that some men are looking over a bridge as one of them falls over and plummets into a river .
Some men are looking over a bridge as one of them falls over and plummets into a river .