There's a rift within the U.S. school choice movement as to whether private school choice programs should cover every child or focus only on the poor. Fortunately, the cause of this disagreement is not so much that the two sides have different goals but that they have different assumptions about what will achieve those goals. And the nice thing about assumptions is that they can very often be tested against the real-world evidence. What actually works better: universal access to the education marketplace, or universal dependence on a government program? That's the question I try to answer over at the RedefinEd blog today, in a post responding to veteran voucher campaigner Howard Fuller.