When dolphins wash up on shore in significant numbers, we suspect there’s something wrong happening in the ocean. It’s just not what we expect. It’s not a natural phenomenon. We may not know what it is exactly, but we guess that, whatever’s happening, however unknown or unknowable to us, it’s got to be about more than dolphins simply taking a notion. Why don’t we have the same common sense intuition about the children at the U.S.-Mexican border?