 The key words here, as we learn in the Ion, are epistasthai and technê. Ordinary poets cannot write both comedy and tragedy, because they do not write out of knowledge and craft (technê) but out of divine inspiration (Ion 534c5–6). If they did write out of craft and knowledge, if they were craftsmen poets, they would be able to write both comedy and tragedy, because opposites are always studied by the same craft. Thus the comedic craft and the tragic craft would have to be one and the same; just as one and the same craft, medicine, deals with both sickness and health.