This is a weak argument. You're responding with a demand for historical examples of alternatives to an argument, not that history provides examples of all alter

This is a weak argument. You're responding with a demand for historical examples of alternatives to an argument, not that history provides examples of all alternatives, but that history provides poor examples of how some alternatives can be implemented. As presented, your argument reduces to the claim that nothing which has not already been done can ever be done, which is so transparently absurd that I can't imagine it's what you actually intend to say.