The Ledger + Consensus Mechanisms: Cryptocurrencies, at their root, are a big book of IOU’s. Jill buys some eggs from Jack, and to keep track of their money they go to the big book in the middle of the town square. Jill writes:.........

Last March, weeks after my 22nd birthday, I was diagnosed with Indeterminate IBD. Which is a fancy way of saying they couldn’t tell if it was Crohn’s or Ulcerative Colitis. The doctors were leaning Crohn’s, and it seems like people are more familiar with Crohn’s thanks to our disease representatives Pete Davidson and Hank Green, so I usually just say I have Crohn’s. I’ll spare the pretty details, but the highlights of my senior year of college included dropping from 135 to 108 pounds in 30 days (I’m 5’8), night sweats, and 10+ mandatory potty breaks a day. This all culminated in an 8 day emergency room trip to the hospital............