The hotdog is a beloved meal that exists in many forms around the world, from Chicago dog, to the ballpark frank, the chilli dog, and on and on. A frankfurter placed within a bun with any variety of condiments in all sorts of combinations. But the question remains, is the hotdog a sandwich?
Yes, a hotdog is a sandwich
Bread with something in the middle? It's a sandwich.
A hot dog is an item between two pieces of bread
Meat and a bun/bread and a filling fit the two requirements for a sandwich.
A hot dog is like a sandwich, but should not be classified as such.
A sandwich requires two pieces of bread
By definition, a sandwich requires two pieces of bread to be present with some sort of food in the middle. A hotdog is only one piece of bread with food in the middle, so it cannot qualify as a sandwich.