 For one thing, it avoids an odd kind of inconsistency. Malloy might not only have been a contender, he might have been 6 inches taller. If we think that is because there is a world in which Malloy himself is 6 inches taller, then it seems like we’re saying that Malloy can have two heights, his actual height and one 6 inches taller. And that looks inconsistent. The obvious way out of this is to say that he bears one height in relation to this world, and another to another world. But that turns height from an intrinsic property into a relation, and that seems like a mistake. Lewis thinks this problem, what he dubs the ‘problem of accidental intrinsics’, is a reason to deny that Malloy himself is in multiple worlds.