I'm trying to figure out how to use swi prolog. I'm not a computer programmer so please go easy on me and assume I know very little. Well, the app works without xquartz. I'm downloading xquartz right now just in case. Clear. Not clear. Clear. Don't understand. what file? what lines? Where do I type %swipl? Huh? Don't understand/ Well, I'll try to understand that part when I get the software to work.