 Initially, informal logic texts defined natural language arguments as verbal arguments: i.e. as arguments expressed and conveyed in words associated with some established natural language. This is an important focus given that arguments of this sort are a staple in the kinds of arguing that informal logic emphasizes — in letters to the editor; parliamentary debate; court proceedings; and in essays and books written in defense of some point of view (that humans could colonize Mars, President Trump was misunderstood, socialism is the best political system, and so on). 