That's true. Ask a simple group of 5 linguists and they all will give you different answers. This literally happened in a workshop we gave at a college months

That's true. Ask a simple group of 5 linguists and they all will give you different answers. This literally happened in a workshop we gave at a college months ago. Quite funny. While working on grmmr (green-bridge.org) we recognized that so many of us are densely confused when it comes to these metalinguistics. So we just stopped using knives that dissected (metalinguistics) words into words and went for friendlier marker (symbols and colors). We need to be reminded that a lot of it is just pretend and educated guesses, no absolutes. Markers seem to work better here than knives do when teaching and categorizing language grammar.