Nuts or Bluetooth?

It used to be that one could be sure that when someone was walking down the street talking to himself, he was most probably nuts.

These days, however, it is almost impossible to tell. This morning, I was walking to work when I approach a woman from behind who appeared to be talking to herself. Not only was she talking to herself, but she was making various gestures. I was almost certain that she was loony.

Then it occured to me that she might have been talking on the phone. I didn't see a phone but nowadays, that doesn't mean anything. She could have been speaking into a Bluetooth receiver for all I know.

It's disconcerting when you can't even identify the locos anymore.