Why so Many Mirror Symmetric Signs in Ancient Scripts?

Plenary Invited Talk: International Society for the Study of Information (IS4SI) Many scripts have a high number of occurrences of signs that have mirror symmetry along a central vertical line. There is also a tendency of increased percentage of mirror-symmetric signs over time, for example from the Minoan Phaistos Disk signs, to Cretan Hieroglyps, and further to Linear A signs. We investigate the reasons for the increased frequency of mirro-symmetric signs. P. Z. Revesz, Trend of increasing percentages of mirror-symmetric signs in the Cretan Script Family and the Phoenician Alphabet Family, Chapter 16 in: M.J. Schroeder and W. Hofkirchner (eds.), Understanding Information and its Role as a Tool: In Memory of Mark Burgin, World Scientific, Singapore, pp. 445-465, 2025. P. Z. Revesz, The development and role of symmetry in ancient scripts. Symmetry: Art and Science. [12th SIS-Symmetry Congress special issue], (1-4), 308-315, 2022. 00:00 Introduction 00:20 Mirror Symmetry 05:10 Boustrophedon Writing 11:11 Religious Beliefs 19:11 Causes of Mirror Symmetry 23:30 Phaistos Disk 25:24 Discussions