Analogy has a long history. It is one of the most important epistemological tools. It is also a common method that judges use in legal process. The Common-law legal family consider analogy the core of legal reasoning, while in Roman-law legal family, analogy first was a usual method and then was limited to a method that remedy legal loopholes. Furthermore, it was forbidden in some legal branches. In fact, analogy is inevitably used in legal process, because it can’t be terminated in solid foundat...