Dialectical logic, with its emphasis on reason, is the basis of Socrates’s “reason = virtue = happiness” that Nietzsche outlines in the above passage. Nietzsche dislikes dialectical reasoning because he sees it as a threat to “nobler taste[s],” or superior philosophical positions. Put simply, he thinks that the dialectic gave weaker, inferior philosophical positions a platform they didn’t deserve. This, in turn, weakens stronger, more logically sound philosophical positions.