Abstract We argue that adopting the Self-Indication Assumption (SIA)—a thesis about self-locating evidence, according to which your existence favours theories on which there are more observers who you yourself might be over theories on which there are fewer—strongly confirms the disjunction of theism, modal realism, or axiarchism. We say that if SIA is correct, your existence becomes highly surprising on garden-variety atheism. For almost certainly, if each of these views are false, only a proper subset of possible observers who you might be would exist, if any. In contrast, on some forms of theism—forms of theism on which God must create an unsurpassably good world—it’s not so unlikely God would create every possible observer, to love and/or benefit each one. Something similar is true of axiarchism, and modal realism entails that every possible observer exists. As a result, we argue, your existence strongly confirms the disjunction of maximizing theism, modal realism, or axiarchism over garden-variety atheism, conditional on SIA.
Adelstein et al. (Tue,) studied this question.