Philosophy majors. That piece of paper does not make you a philosopher.

Bit of a tangent, but it's fun to think about how much it takes to become a -er, -ian or -ist in a given field. Philosophy is probably one of the hardest, you need to be seen as up there with the all-time greats. In history or physics you probably need to be faculty, in economics you need to have a PhD, in engineering you don't even need a degree but you need to be practicing,...