This is how sad I have become:
First of all I went to school today to take a practice test, and I'll probably go back tomorrow to study some more. But perhaps more seriously, I needed to look up something about the radius, so I googled it. And the first results were about the radius of a circle and I found myself momentarily confused. "What is this radius that is not the lateral bone of the forearm?" Oh lord. My brain is mush...and it's only going to get worse.