Lecture on Thursday, March, 22, at SemioLab, Faculty of Philosophy, Aristotle University of Thessaloniki titled "Coherence and Truthfulness Communication: Intracommunicational and Extracommunicational Indexicality", by Lars Elleström, Professor of Comparative Literature at the Department of Cinema and Literature at Linnaeus University of Sweden. The filming was carried out by IT Center of Aristotle University of Thessaloniki.