AbstractbyBeau BransonThe doctrine of the Trinity is central to mainstream Christianity. But insofaras it posits “three persons” (Father, Son and Holy Spirit), who are “one God,”it appears as inconsistent as the claim that 1+1+1=1.Much of the literature on “The Logical Problem of the Trinity,” as this hasbeen called, attacks or defends Trinitarianism with little regard to the fourthcentury theological controversies and the late Hellenistic and early Medievalphilosophical background in which it took shape. I argue that this methodology,which I call “the Puzzle Approach,” produces obviously invalid arguments,and it is unclear how to repair it without collapsing into my preferred methodology,“the Historical Approach,” which sees history as essential to the debate.I also discuss “mysterianism,” arguing that, successful or not, it has a differentgoal from the other approaches. I further argue that any solution from the HistoricalApproach satisfies the concerns of the Puzzle Approach and mysterianismanyway.