 The development in the empirical study of real life reasoning is the study of argument “corpora” — large collections of argument drawn from natural language discourse. In an early study of this sort, Jorgenson, Kock and Rorbech 1991 analyzed a series of 37 one-hour televised debates from Danish public TV. The debates featured well-known public figures arguing for and against policy proposals. A representative audience of 100 voters voted before and after the debate. Their conclusions were compared with standard notions of “proper” and “valid” argumentation. Other studies consider corpora made up of large databases of selected written texts (see, e.g., Goodwin and Cortes 2010, and Mochales and Ieven 2009). 