A more general classification of redundancy is pleonasm, which can be any unnecessary words (or even word parts). Subsuming both rhetorical tautology and RAS syndrome, it also includes dialectal usage of technically unnecessary parts, as in "off of" vs. "off". Pleonasm can also take the form of purely semantic redundancies that are a part of the de facto standard usage in a language and "transparent" to the user (e.g., the French question "Qu'est-ce que c'est?" meaning "What's that?" or "What is it?", which translates very literally as "What is it that it is?"). The term pleonasm is most often, however, employed as synonymous with tautology.