Imagine you’re walking along one day in a park. You look down and see an envelope, which you pick up. It’s fine quality paper, with an embossed company logo on the back and full postage on the front. Impressive.
To your surprise, however, the envelope has nothing written on the front – no recipient’s name, no address. And you can tell, on closer inspection, that it also has no contents.
This envelope, I’m sorry to [...]