I’m still rummaging through my copy of Where Mathematics Comes From, reveling in each revolutionary detail. It represents such an upheaval in my understanding of math, I started feeling more free to question basic mathematical concepts. Lately I’ve been wondering about the mystical value of Pi. Why do we divide a circle’s circumference by its *diameter* for our fundamental value, and not by the radius? To me, the radius seems like the most essential property of circle. (Inspired to look for essences by a rejection of Platonism is pleasantly ironic, no?) Or at least, the most convenient. This would yield 2Pi (6.28…) as the fundamental value, and considered as an angle would represent a full turn of a circle instead of half. The idea has been churning in the back of my head, and today I was surprised to find an article by a mathematician who agrees!