No human investigation can be called real science if it cannot be demonstrated mathematically.

Nessuna humana investigazione si pio dimandara vera scienzia s’essa non passa per le matematiche dimonstrazione.

(No human investigation can be called real science if it cannot be demonstrated mathematically.)

— Leonardo da Vinci (Italian polymath, 1452 – 1519), in his Treatise on Painting, Chapter 1