 In part because reasoning and argument are ubiquitous and of interest across many disciplines, informal logic has in many ways been influenced by cognate fields which analyze argumentation in some way. The latter include formal logic, speech communication, rhetoric, linguistics, artificial intelligence, discourse analysis, feminism, semiotics, cognitive psychology, and computational modelling. Considered in this broader context, informal logic is a subfield of a broader multi-disciplinary attempt to develop a comprehensive account of real life arguing which is commonly called “argumentation theory.” 