Language in politics matters. There is a slightly irritating “joke” online at the moment, whereby if you write something that someone doesn’t agree with, they reply: “And if you believe that, I’ve a bus you can write it on.”

It was probably the funny the first time, when someone made an outlandish claim like the one on the Vote Leave bus (”We send the EU £350million every week — let’s fund our NHS instead”). But I had it yesterday for pointing out that Labour had said something before the election (on tuition fees) that it was now rowing back on. “Holding politicians to account for the things they say is not partisan,” I said, getting the response: “And if you believe that, I’ve a bus