How Can We Hope to Detect and Eliminate Error?

Political philosophy traditionally centred on a collection of issues that papa called the who should rule question. Poper wrote: "How can we hope to detect and eliminate error? Knowledge without authority?" The answer is basically the same for human decision making as it is for science. It requires a tradition of criticism, in which good explanations are sought. But what use are explanations if they cannot make predictions, and so cannot be tested through experience, as they can be in science? This is really the question, how is progress possible in philosophy? As i discussed in chapter five, it is obtained by seeking good explanations. Objective progress is indeed possible in politics, just as it is in morality generally,