Phizzy
"the convoluted selection of ‘2520 years’ doesn’t even have any direct biblical basis." I would suggest it doesn't have any indirect basis either.
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False for it is based on both direct and indirect evidence.
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The Book of Daniel is agreed by a consensus of Scholars to be a thinly veiled political/religious tract against Antiochus Epiphanes 1V, no way was the seven times/years envisaged by the writer to be any longer than what the Chapter says, seven years of madness for the King. "Daniels" prophecies were supposed to happen very soon, apart from the vague apocalyptic stuff.
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Nonsense for scholars are divided as to the time of writing or composition of the book of Daniel.
Scholars are inconsistent with their treatment of the Neb's literal 7 years vacancy from the throne which falsifies secular NB Chronology.
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To extrapolate 2520 years from "Daniel" is a twisting and misuse of Scripture, and you have to be deranged to accept it.
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No for it comes down to exegesis of the biblical text which clearly shows the equivalence of the Danielic 'seven times' interpreted by the dating formulas contained in the book of Revelation which contain the keys for unlocking sacred mysteries.
scholar JW