 Even if we accept the convergence of Kant and rule consequentialism, it still remains to be shown that these optimific and uniquely universally willable principles are the only set of principles that no-one could reasonably reject. The key step in this second prong of the convergence argument is the claim that “when there is only one relevant principle that everyone could rationally choose, no one’s objection to this principle could be as strong as the strongest objection to every alternative” (Parfit 2011, volume 2, p. 245).