David Hume and Descartes because these are two of the most eminent philosophers of the Enlightenment period. David wrote extensively about the empirical argument and expanded the work of John Locke. He was eloquent and was a serious skeptic. His most powerful tool against philosophers were the words "Prove it." Descartes is one of the most interesting people in modern history. He changed the focus of philosophy from the nature of everything to the nature of what we know and how we can be sure of what we know. Most of philosophy since his time has been devoted to the exploration of those topics he brought up. To watch these two fantastic minds would be superior. Also, Immanuel Kant would have to be invited. He is the moderator of the two differing theories of the Enlightenment in philosophy:rationalism and empiricism, as well as being the most brilliant thinker of his time. His works are the most influential treatises on ethics, metaphysics and epistemology by any modern thinker. Charles Darwin would be my fourth choice as a brilliant scientist with a grounding in the real but a faith in God. I would like to talk to him myself about what he thought of his own work and whether it goes against the works of God, as he believes in them. Aristotle, Socrates and Plato are three other philosophers(yeah, that puts me up to 7...but it's my party!) i'd love to have at my party for the brilliance they would bring. Also, seeing such giants of thinking square off with modern philosophers who are in their tradition would be superior. I'd love to watch Socrates and Aristotle pick Darwin's mind about his theories. Aristotle would be particularly interested since he was a scientist at heart, as well as a philosopher. It would also be amazing to see them work through the new information. Dinner would be a greek salad to start, beef tenderloin or perhaps sirloin, red wine and a desert of chocolate extasy cake with rosemary whipped chocolate cream mouse on top. you can tell my favorite part of that meal...lol. not too much wine, though, as it would dull the senses.