According to the dictionary, lists are useful "series of names or other items written or printed together in a meaningful grouping or sequence so as to constitute a record". Of course it's meaningful! The point of a list, is usually to classify, or, in the case of a grocery list, to REMIND you what you need to buy at the grocery store. Because when you get to the grocery store, there are so many distractions, that you draw a blank and the needs of home are forgotten. That's where the list comes in. Unless of course, you're as cool as I am, and make a list, and leave it. At home.