Last month, National Defense University professor Donald Stoker wrote a thought-provoking article for Real Clear Defense that examined China’s actions in the Korean and Vietnam Wars and concluded that it will be “exceedingly difficult to deter China in regard to Taiwan,” and that a successful American strategy of deterrence “requires strength, capability, credibility, and will.” A grand strategy of deterrence affects the mind of the enemy--in this case, the mind of Chinese President Xi Jinping and the minds of Xi’s top advisers. The United States and its allies, Stoker writes, must “produce overwhelming doubt in the minds of China’s leaders” that they can take control of Taiwan “at an acceptable cost.”