english: Even mathematicians, who in some sense are the freest of all thinkers, literally couldn't see not only the sea slugs around them, but the lettuce on their plate -- because lettuces, and all those curly vegetables, they also are embodiments of hyperbolic geometry.
non_english: Zelfs wiskundigen, die in zekere zin de meest vrije van alle denkers zijn, zagen letterlijk noch de zeeslakken om hen heen, noch de sla op hun bord. Want sla en al die krullende groenten belichamen evenzeer de hyperbolische meetkunde.