That dog darting across the street, ears back, nose low – you must have seen it? No, there were no invisible sheep (that I saw), but the dog, all black and white as you’d expect, cut across the road when there was no traffic and disappeared down that alley. Why would I imagine it? It’s not a miracle or a hangover from evening parties. It’s just a dog that crossed the street. With no invisible sheep. Don’t doubt me.