We know that during the work day professionals might face impossible tasks . We have to be prepared for this as well. What about comparison of two documents that have nothing in common ? No common ancestor? No lines to compare? For this very case the “by keywords” function was introduced. Try it to compare the text of two articles about the same topic copied from different websites. Doing this simple keyword analysis you’ll learn a lot about language that different journalists use. And off course, this is the fastest way to compare two documents and to get an idea about the difference between them.