If anything simply cannot go wrong, it will anyway. If everything seems to be going well, you have obviously overlooked something. Kunst kommt von k nnen, nicht von wollen. Es hie e sonst Wunst. It is impossible to make anything foolproof because fools are so ingenious.
Every solution breeds new problems.
To design something really well you have to get it. You have to really grok what it's all about. Most people don't take the time to do that. All computers wait at the same speed. Computer - A device designed to speed and automate errors.