When pressed to explain the elements in Guernica, Pablo Picasso said: “This bull is a bull and this horse is a horse… If you give a meaning to certain things in my paintings it may be very true, but it is not my idea to give this meaning… I make the painting for the painting. I paint the objects for what they are.”

Owen Maclaren designed the undercarriage for the Spitfire, Britain’s most famous warplane, and years later applied the same thinking to create the first foldable pram. Aluminium rods enabled the plane undercarriage to retract and fold into the fuselage, so he used the same material for his prams.