.Doug Mason
How are you, my dear friend?
You are correct in that 539 BCE for the Fall of Babylon is a calculated date calculated from secular tablets hence properly considered by Chronologists as a Pivotal or Absolute Date and is accepted by the 'celebrated WT scholars'. COJ considers 568 BCE as an Absolute Date but this has been seriously challenged by Rolf Furuli and is not listed by the world's most prominent Chronologist, Edwin Thiele thus scholars have not accorded the same status as an Absolute Date to 568 BCE as they have accorded to 539 BCE.
Regarding your previous comments on 537 BCE for the Return of the Jewish Exiles it must be stated that what event marked the beginning of the 70 years was not the Fall of Jerusalem in 607 BCE. the fifth month but the evacuation from Judah in the seventh month, 607 BCE, both events occurred in the same calender year of 607 BCE
Scholarship has no problem with 537 BCE for the Return of the Jews because it well accords with both the textual and historical data and is the suggested date in much of the literature. COJ had no problems with 537 BCE as he dealt with the matter by means of a footnote reference.
Blessings
scholar