Look, this is my litmus test: I pretend I am the original Earl of Sandwich. I have asked for non-bread foods to be brought to me inside bread, that I might more easily consume them one-handed while gambling.
This does not enable my wretched regency habits. This is not what I asked for. I do not deign to grace it with the name of my house.
This is the most important addition to the sandwich discourse I have ever read.
THIS IS THE BEST LITMUS TEST FOR SANDWICH-OR-NOT I HAVE SEEN.