{∅, {∅}, {∅, {∅}}} : Rage Against the Meat Grinder

"It seems that there was a mathematician who had become a novelist. 'Why did he do that?' people in Gottingen marvelled. 'How can a man who was a mathematician write novels?' 'But that is completely simple,' Hilbert said. 'He did not have enough imagination for mathematics, but he had enough for novels.' "From Hilbert by Constance Reid.

Wir mussen wissen. Wir werden wissen. -Hilbert

(We must know.We will know)