How do you know when a computer is wrong?

Most people think that whatever output a computer gives you is the right answer. This is not always the case. If you are not a programmer, you may find this surprising. Computers are stupid. All they do is add ones and zeros very fast. It's up to the programmer to make sense of the input and output. But, programmers are human, and they make mistakes. They make assumptions on how to interpret the inputs and manipulate them to give an expected output. Some types of programs are more... Read more