input predicts an output'. In other words, some human somewhere knows what the computer will spit out, given his knowledge of what went in.
Your explanation is the best in the fewest words I've seen.
Sorry, this is simply not the case. Ignoring aviation for a moment. An example. It took a computer a long, long time to find and verify the highest Prime Number (known to date). Your analogy indicates someone, somewhere already knew the answer.