Instead of trying to prove your opponent wrong, try to see in what sense he might be right.
Robert NozickMarxian exploitation is the exploitation of people's lack of understanding of economics.
Robert NozickPhilosophical argument, trying to get someone to believe something whether he wants to believe it or not, is not, I have held, a nice way to behave towards someone; also it does not fit the original motivation for studying or entering philosophy. That motivation is puzzlement, curiousity, a desire to understand, not a desire to produce uniformity of belief. Most people do not want to become thought-police. The philosophical goal of explanation rather than proof not only is morally better, it is more in accord with one's philosophical motivation.
Robert Nozick