Socrates would say that whether "rap" is music is a question of definition, not of taste. For example, I hate James Taylor, but would never deny that what he does is music. And yet, in American usage, even before Webster's Third New International (1961), the third of seven definitions of music has been "any rhythmic sequence of pleasing sounds." By that standard, whether rap is music DOES depend on whether we happen to find it pleasing, which makes the question subjective after all! Likely this means "intended to be pleasing," not necessarily "found to be pleasing." And yet! Not a question to be trifled with, at least if you are a philosopher or lexicographer or both.
