A Chemistry PhD Isn't Always Useful

Today, my professor told us about being stopped by a policeman after he left a restaurant inebriated. (I'm not sure whether he attempted to drive or not). He believes the cop was waiting for him.

The policeman wanted him to take a Breathalyzer test. My professor asked him, "Do you know how that works?" The cop admitted he knew how to operate it, but not the details of the mechanism.

My professor then tried to convince the policeman that the Breathalyzer was an inaccurate instrument, and he shouldn't be subjected to such a test, using biochemistry mumbo-jumbo.

The cop got angry and gave him a $350 ticket.