There is something to what you say, but it is also an example of survivor bias. Yes you use things that haven't failed, because the ones that have failed have

There is something to what you say, but it is also an example of survivor bias. Yes you use things that haven't failed, because the ones that have failed have failed. We've always been prone to over-engineering, because of mistakes like this: http://en.wikipedia.org/wiki/Tay_Bridge_disaster http://en.wikipedia.org/wiki/Tay_Bridge_disaster