A group of four people watch while a man wearing a gray shirt grabs hold of a trapeze bar attached to a tree branch .
Chances are about even that four individuals are at an outdoor circus and watch a trapeze artist .
It is impossible that four individuals are at an outdoor circus and watch a trapeze artist .
Chances are about even that four individuals are at an outdoor circus and watch a trapeze artist .
Four individuals are at an outdoor circus and watch a trapeze artist .