It's all the same. There is nothing about those white marks on a dark surface which necessarily indicates artifice. No, it's not. It's a Poisson-Voronoi tessellation within the granulation of a fluid surface due to convection cells. It's mathematics so don't fret too much about your error. I wouldn't expect everyone to understand it. No, I'm saying that I recognise a Posson-Voronoi tessellation. It's mathematics, I'm a mathematician. Recognising patterns is our business. No, just you. Incidence of knife crime is not randomly distributed. You don't get knife crime on top of Ben Nevis but you do get a lot of it in the poorer and more densely populated areas of large cities. Excellent. Something upon which we agree.