This is not a good week for me when it comes to making assumptions.

First, there was my encounter with bigotry and dealing with that, and then, when I thought I had a great solution, there was this: Several of my students decided to be wiseacres (putting it nicely) and asked me what temperature I was today. It was clear that my strategy hadn’t worked except in that one case (and even then it was probably mostly because of how I responded to them, not because of the technique itself) and that it wouldn’t work again.

I guess that proves that “diamonds” are not, in fact, forever.