All my friends who had grown up in the organic New York suburbs had, at some point around age 14, taken a blood oath never ever to live in the suburbs as adults.
All of my friends swore they would never live in the suburbs. 
mnli hypothesis: All of my friends swore they would never live in the suburbs.  premise: All my friends who had grown up in the organic New York suburbs had, at some point around age 14, taken a blood oath never ever to live in the suburbs as adults.