Four people sit on the steps of the entrance to a building .
There is a better than even chance that four people sit on the steps of the entrance of a building waiting for their friend .
There is a better than even chance that four people sit on the steps of the entrance of a building waiting for their friend .
Chances are slight that four people sit on the steps of the entrance of a building waiting for their friend .
Four people sit on the steps of the entrance of a building waiting for their friend .