Ethically speaking: Kevlar

摘要

I like to ride my bike, and if I can avoid driving a car, I do. After moving to Colorado almost six years ago, I found that I was getting a flat tire on my bike about once a month. I hate changing inner tubes, especially on the road. My solution: Kevlar. I bought Kevlar tires for my bike. I wanted to guarantee that I do not get flat tires. After all, Kevlar is used in bulletproof vests, so no little thorn or sharp object will interrupt my bike ride anymore. Well, a little while ago, I came home with a flat tire! How can that be? I found a small thorn that penetrated the Kevlar and put a tiny hole in my tube that caused a slow leak. My tire can stop a bullet, but not a tiny thorn? I guess Superman can stop a speeding train, but crumbles in the vicinity of kryptonite.