New systems generate new problems. Any give program, when running, is obsolete. A computer makes as many mistakes in two seconds as 20 men working 20 years make. The primary function of the design engineer is to make things difficult for the fabricator and impossible for the serviceman. After all is said and done, a hell of a lot more is said than done.
Computers are unreliable, but humans are even more unreliable.
Any system which depends on human reliability is unreliable. If you can't understand it, it is intuitively obvious. Work smarter not harder and be careful of you spelling. If it's not in the computer, it doesn't exist. If an experiment works, something has gone wrong.