[...] The phrase "all phenomena are not-self" could be viewed as an ontological statement. It discusses how things are. The phrase also could be viewed as a speculative view. But we know that it is neither. Likewise, the phrase "empty of inherent existence" does not necessarily imply an ontological speculative view. Rather, it describes something that we can see with discernment, as the Buddha taught in his own words. When someone uses this phrase, particularly in a discussion that draw in Theravada and Mahayana perspectives, it is not a mistatement of the Buddha's teachings. Rather, is is one window into the Buddha's teachings. Admittedly, this particular phrase is a window with some smudges on it, because so many people have poked their fingers at it over the years. But at its core, there's nothing wrong with using this phrase. It does not have to mean "nothing exists."