Once again, you have shown your flawed logic. You boast that the Society's chronology models takes us "right back to Adam", as if having any chronology back to Adam means it must be correct. I did not suggest that 539 is a not valid pivitol year, but that the Society is hypocritical in accepting that year because it is determined using methods the Society criticizes as being invalid. It is only the Society's interpretation that introduces the unexplainable 20 year gap, a gap which puts the entire history of the Kingdom of Israel prior to the Neo-Babylonian out of synchronization with secular history by - you guessed it - 20 years. Therefore, the Society boldly asserts that every single historically determined date up until that point is wrong, yet it accepts the year 539 that is established using the same 'uncertain', 'unreliable', 'misunderstood' methods used to determine those dates.
The Society is biased in its criticism of secular chronology. In the Insight Chronology section (page 454) an example is given of 'flawed' dating regarding Shalmaneser. Here the Society revels in the apparent discrepancy, without any attempt at reconciling the secular and biblical history such that both may be correct.
Compare this to their dogged efforts at harmonising biblical accounts of the Isrealite Kings. Such as their defense of 2 Chronicles 16:1 which states that Baasha attacked Judah after he had died about 10 years earlier (Insight, volume 1, page 184 [Asa]). Or the discrepancy between 2 Kings 14:21 (Uzziah (aka Azariah) became king at 16 years of age, 15 years after Jehoash's death) and 2 Kings 15:1 (Uzziah (aka Azariah) became king in the 27th year of Jeroboam at 16 years of age) (Insight, volume 1, page 1146 [Uzziah]). Or the discrepancy between 2 Kings 14:29 (Zechariah began to reign when Jeroboam died) and 2 Kings 15:8 (Zechariah became king in the 38th year of Uzziah (aka Azariah)) (Insight, volume 1, page 1223 [Zechariah]). Or the discrepancy between 2Kings 15:30 (Hoshea began to reign in the 20th year of Jotham) and 2 Kings 17:1 (Hoshea began to reign in the 12th year of Ahaz) (Insight, volume 1, page 1149 [Hoshea]). For these cases, they suggest explanations that could be correct, but they don't allow the same latitude for what seem like errors in sources used for secular dating.