Let us sit together and speak of knowledge as men do. Always ask: What does this reviewer know? We know what he thinks, but what does he know? This command comes from one of the smartest, most experienced and most knowledgeable wine writers/reporters/critics I've ever known: Dan Berger. He wrote it in his latest issue of his "Dan Berger's Vintage Experiences" in an article entitled Analyzing Marketing. In this article he lists a series of aphorisms and truths that he…