A factory worker is wearing an orange hard hat while working .
There is a very good chance that a worker wears a hard hat to avoid having an accident like he did in the past .
It is impossible that a worker wears a hard hat to avoid having an accident like he did in the past .
There is a very good chance that a worker wears a hard hat to avoid having an accident like he did in the past .
A worker wears a hard hat to avoid having an accident like he did in the past .