Abstract
In recent work, philosophical theologians Michael Rea and Jeffrey Brower have formulated a precise way of understanding the doctrine of the Trinity along the lines of a contemporary constitution theory of material objects. Here I explain the theological and philosophical thinking behind their proposal, and give seven objections to it. Stepping back to consider methodology, I distinguish several goals a Trinity theory may aim at, and argue that the theory at hand achieves some but not others. Most importantly, it fails as a Rational Reconstruction of creedal trinitarian claims.