If he had lived long enough to witness the relegation of Pluto to the status of a dwarf planet in 2006, Lewis would have been quietly pleased. He would have taken it as confirmation of his view that ‘a scientific fact’ is not necessarily the immutable, universal truth that it is popularly believed to be. The glory of science is to progress as new facts are discovered to be true, and such progress means that ‘factual truth’ is a provisional human construct. Which is why the wise man does not think only in the category of truth; the category of beauty is also worth thinking in. – Michael Ward, Planet Narnia, 27