Sorry if this is a stupid question but fortunately I’m uneducated.

You have “Marxist economists” like Richard Wolff and Michael Hudson, and you have “non-Marxist leftists” like Noam Chomsky and Carl Oglesby. What do Marxist and non-Marxist mean in this context? Is it like, Marxists think that everything Marx thought was correct and non-Marxists think everything he thought was wrong? Or is it like a >50% thing, if you think Marx was right more than half the time you’re a Marxist and if not then you’re a non-Marxist?

This is probably the wrong community to ask but how is it possible to be a non-Marxist (assuming that means you think Marx was wrong about everything) when fictitious capital and a reserve army of labor are staring you in the face?