Really nailing the condescending aristocrat way of thought. Proles have no minds of their own, so if Marx "lost" a debate they would all abandon marxist communism in favour of anarchists because that's what the people who think decided.
The question whether objective truth can be attributed to human thinking is not a question of theory but is a practical question. Man must prove the truth — i.e. the reality and power, the this-sidedness of his thinking in practice. The dispute over the reality or non-reality of thinking that is isolated from practice is a purely scholastic question.