Not over time. Each failure is knowledge banked away, knowledge that is often cross-applicable to other situations. Even for skilled tradesmen, there is alway

Not over time. Each failure is knowledge banked away, knowledge that is often cross-applicable to other situations. Even for skilled tradesmen, there is always the possibilty of having a job go bad and having to eat the cost of putting it right. Some of the jobs I have tackled myself make friends stare in disbelief. I always figure 'a human made this thing, a human can fix it'.