As my dad always says, "you can call me a jar, as long as you don't smash me to bits". Since Slavic proverbs don't always translate well to English, it might be

As my dad always says, "you can call me a jar, as long as you don't smash me to bits". Since Slavic proverbs don't always translate well to English, it might be best to clarify: what you call yourself is not as important as what you do. What @sgt101 wrote about measurements is an important and insightful point. Does it mean we can't call ourselves engineers? That's a discussion that won't be resolved any time soon. Personally, I care more about the job itself, than about the label you slap on it.