Is Smashed Avocado Guacamole, even when it doesn't have spices or any other flavoring?

I've seen a lot of sandwich shops that have smashed avocado as a topping, and me and my brother have been arguing about it. He say the sandwich shops are "retarded for not knowing the difference between avocado and guacamole" but I think that it's only guacamole after it has onions, peppers, lime juice, ect.. Anyway, which one of us is right?