http://popups.lib.uliege.be/1373-5411/index.php?id=400 The distinction of external (exo) and internal (endo) perspectives is addressed with respect to the issues of observation and measurement in quantum theory. It is demonstrated how the exo/endo-terminology can be fruitfully applied to two equally important concepts of reality in the quantum world: local (common sense) reality and holistic (nonlocal) reality. Basic elements of the exo/endo-distinction are then used to interpret certain features concerning the issues of time, histories, and presence. Full text issues Volume 2 Physical and Engineering Systems fr Thu, 27 Jun 2024 10:09:35 +0200 Thu, 27 Jun 2024 10:09:49 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=400 0