法律推理的关键是类比推理，而类比推理的关键步骤存在于对原则的界定之中，该原则使得相似性或者区别的主张得以证立。因为原则之界定是一个评价的事项，不合适发现或者计算什么，若要人工智能能够进行类比推理，它必须能够很好地进行价值判断。目前，人工智能无法有效进行价值判断。因此，人工智能目前还不能进行法律推理。
Analogical reasoning is the core of legal reasoning. The crucial step in analogical reasoning consists in the identification of a principle that justifies a claim of similarity or difference. Because the identification of that principle is a matter of evaluation， and not of finding or counting something， artificial intelligence is able to engage in analogical reasoning only to the extent that it is capable of making good evaluative judgments. At present， artificial intelligence couldn't make evaluative judgment， so it couldn't do legal reasoning.
