In this article, I assess (1) whether some cyborgs and AI robots can theoretically be considered persons; and (2) how we will know if/when they have attained personhood. Since our discourses of personhood are inherently pluralistic and our concepts of both humanness and personhood are inherently nebulous, both some cyborgs, and some AI robots, I conclude, could theoretically be considered persons depending on what, exactly, one means by “person.” The practical problem of how we distinguish them from nonpersonal AI entities (...) is, however, both more important, and much more difficult to solve. In conversation with various secular and theological accounts of relational personhood, I argue that only by treating AI entities as persons by default might we avoid the potentially catastrophic consequences of mistakenly denying personhood to an entire group of eligible entities. (shrink)