On an initial mental health consultation with a psychiatric nurse practitioner, I was asked, among many other odd questions, to count backwards by three. 100, 97, 94...
This was quite a number of years ago and I've often wondered what the purpose behind this question was, and what some of the the other curious questions accomplish. I have my suspicions, but I'm not certain.
What's a baker's dozen? What do you think "people in glass houses shouldn't throw stones" means?