Looking at the name, tailcoat might be considered a coat, but depending on how noticeable the tail part is, it can heavily resemble a jacket. Is it its own category or does it fall under coat or jacket? Furthermore, since we don’t have specific *_tailcoat tags (black tailcoat), we should decide on how it goes with other *_coat or *_jacket tags (e.g. black coat/black jacket). Or, create new *_tailcoat tags, which isn’t what’s usually preferred.