In general, if you're not sure if someone is a philosopher or not, just add a prefix to "philosopher". If you call someone, for example, an "urban philosopher",

In general, if you're not sure if someone is a philosopher or not, just add a prefix to "philosopher". If you call someone, for example, an "urban philosopher", nobody really knows what that means, and therefore they're going to have a hard time arguing against it. And the rest of us can get along in peace without being drawn into another semantic debate.