The Die Hard Water Riddle Explained by a Unicorn

Tonight we'll be watching Die Hard With A Vengeance, aka Die Hard 3 in the stream. In honor of the occasion, here's a quick synopsis of the water jug test that villain Simon forces our heroes to solve under threat of exploding.

When I was a kid and I first saw Die Hard 3, I was frustrated by my pea-brains inability to suss out how exactly this things worked. Only as a grown up with a velociraptor sized brain did the answer finally sink in.

Thanks a million to for the chalkboard vector!