You probably know what a sandwich is, to a certain degree. Just two slices of bread with some stuffing in between. Right? But what if it gets more complicated than that?

We're familiar with this.

And this.

Of course, this is a sandwich.

Then there's this.

But things get complicated when this comes along. Is this a sandwich?

How about this? Is this a sandwich?

The Atlantic dissects the sandwich and ponders just what exactly it is and how its name has changed over the years to include other things.