Bad people can make your computer do the wrong things and tell the bad people about stuff they are not supposed to know. People try to make computers that only do the right things. But it is hard to tell a computer what it should do because you have to think of all the mean things that bad people can do to your computer. I figure out how to tell computers to do things in a way that stops the bad people from causing the computers to do wrong things.
(Using the Up-Goer Five Text Editor, which only allows common words)