Ermolao Barbaro composed an epitaph for him. "De inventione dialectica" was influential in creating a place for logic in rhetorical studies, and was of significance in the education of early humanists. It was a critical, and systematic treatment of ideas and concepts related to dialectics. "The significance of "De inventione dialectica" for the history of argumentation is that it assimilated the art of dialectic to that of rhetoric. Argumentation focused not on truth but on what might be said with reason. Accordingly, Agricola focused on the "Topics" rather than the "Analytics" of Aristotle and on Cicero, but also on the writings of historians, poets, and orators. Thus, for Agricola, dialectic was an open field; the art of finding 'whatever can be said with any degree of probability on any subject'(Hamilton, David. "From Dialectic to Didactic"). It also affected the deaf community. He held that a person who is born deaf can express himself by putting down his thoughts in writing. The book was not published until 1515. His statement that deaf people can be taught a language is one of the earliest positive statements about deafness on record (Gannon, 1981). Agricola's "De formando studio"—his long letter on a private educational programme—was printed as a small booklet and thus influenced pedagogical insights of the early-sixteenth century. Agricola's real legacy was his personal influence over others. Erasmus admired Agricola, eulogizing him in "Adagia" and calling him "the first to bring a breath of better literature from Italy." Erasmus claimed him as a father/teacher figure and may have met him through his own schoolmaster Alexander Hegius (most probably one of Agricola's students) at Hegius's school in Deventer. In addition to Hegius, Agricola's students include Conrad Celtis (in Heidelberg). Erasmus made it his personal mission to ensure that several of Agricola's major works were printed posthumously. Agricola's literary executor was Adolphus Occo, a physician of Augsburg. By about 1530 disciples and followers had gathered in the manuscripts left by Agricola, and these were edited by Alardus of Amsterdam.