The answer to this question lies in the fact that for some unexplained reason they both share an illicit grounding for knowledge. Thomas Nagel is one of the reasons I have very little respect for scientifically uninformed philosophers even if they are atheists. His forthcoming book is titled, Mind and Cosmos: Why the Materialist Neo-Darwinian Conception of Nature is Almost Certainly False.
About this book we read on Amazon:
The modern materialist approach to life has utterly failed to explain such central features of our world as consciousness, intentionality, meaning, or value. This failure to account for something so integral to nature as mind, argues philosopher Thomas Nagel, is a major problem, threatening to unravel the entire naturalistic world picture, extending to biology, evolutionary theory, and cosmology.