Of course there are. I’m confused what the issue here is. No one is saying there is only the proletariat and only bourgeoisie. There is labor aristocracy, petit-bourgeoisie, lumpenprole, new gradients that emerging even now as a result of present material conditions. But the principal contradiction is defined by the relationship of the proletariat, the exploited, and the bourgeoisie, the exploiters. What’s so hard about that to understand