 In some dialogues, craft (technê) and knowledge (epistêmê) seem interchangeable in much the same way as in Xenophon’s Socratic dialogues. In the Charmides (165c) Socrates says that medicine, i.e., the physician’s craft (iatrikê technê), is the knowledge (epistêmê) of health. In Euthydemus (281a) Socrates says that what guides right use of materials in carpentry is the knowledge of carpentry (techtonikê epistêmê). In Ion (532c) Socrates tells the rhapsode Ion that he is not able to talk about Homer with craft and knowledge. In Protagoras (356d-e) Socrates refers to measuring as both a craft and a kind of knowledge.