This is a life of confusion. Dresses are shirts. Shirts are dresses. Pantyhose are pants. (Well, that last statement may apply only to Lady Gaga, a very talented young woman who is not in any way desperate for all the attention she can direct to herself via her barenaked bottom.) So why can't a cover-up be a tunic, 'tunic' being the word you use for something that may be a shirt or may be a dress, but you're not really sure, and you're not shopping at Forever 21, where they thoughtfully identify the clothing category for you on the hang tag?