A decades-old policy of “strategic ambiguity” is breaking down; we ask about the risks and the stakes of a potential Chinese bid to take Taiwan by force. The number of diseases jumping from animals to humans is set to keep rising; we look at why, and how to make the jump rarer. And the misguided mission to understand canine communication. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/intelligenceoffer