 Informal logic is an attempt to build a logic suited to this purpose. It combines accounts of argument, evidence, proof and justification with an instrumental outlook which emphasizes their usefulness in the analysis of real life arguing. Blair 2015 identifies two key tasks for the informal logician: (i) the attempt to develop ways to identify (and “extract”) arguments from the exchanges in which they occur; and (ii) the attempt to develop methods and guidelines that can be used to assess their strength and cogency. 