Don't let the coffee grind you down

The topic of discussion at work today is the coffee machine. It has a window at the front where you can see some coffee beans, so you might assume that it grinds some of those beans to make your coffee. But my contention is that they are just for show, and the coffee inside is already ground. I suggested this to a colleague, and he didn't want to believe me because he would feel cheated. Now he's told me that he thinks that the bean level in the window has gone up. I think that he might be seeing what he wants to see.

Rest assured that I'll keep you up to date with developments (if there are any).