According to Huemer (2019), existence is evidence of immortality, provided past time is infinite. The argument is based on, inter alia, an alleged contradiction between the fact of one’s existence now and its improbability. I suggest that Huemer’s argument is flawed in equating the infinitesimally small with its limit value, and in assuming a philosophically significant difference between the a priori probability of the occurrence of a unique incarnation and that of anyone among an infinite number.