"Maybe the cacti math is wrong or maybe
*blink* Is this a new use for cacti that I didn't know about? Math and graphs... Who needs computer? Just head out into the desert and grab yourself a cactus, Nature's natural abacus.
(Personally, I think it's a plot. First the cacti are going to take over the WRC, and then they'll take over the world. Soon we will all bow before our prickly, vegetable-y overlords.)