Richard Hayes (1993, 2013) and Dan Arnold (2008, 2012) have argued that Dharmakīrti (ca. 600–660 c.e.) is a mind-body dualist. The proof, they say, lies in the justification he gives for his theory of rebirth. In this essay, I put Dharmakīrti's argument to the test against a rival argument of Nāgārjuna. It turns out Nāgārjuna completely rejects the mind-body dualism of Dharmakīrti and the rebirth theory built upon it.