元形而上学

题目中的“理解”是要理解什么，很多时候 metametaphysics 就是题目描述中那本论文集中讨论的所谓 foundations of metaphysics, 原文里就有说

It (metametaphysics) asks: Do the questions of metaphysics really have answers? If so, are these answers substantive or just a matter of how we use words? And what is the best procedure for arriving at them—common sense? Conceptual analysis? Or assessing competing hypotheses with quasi-scientific criteria?

那篇 introduction 详细介绍了 metametaphysics 里的主要问题，能把这篇 introduction 看完就不会有什么不理解的了。除此之外，我个人还强烈推荐这本书入门，Tuomas E. Tahko ＜An Introduction to Metametaphysics＞ 2015