The author of this article is using some of the same arguments that Sir Isaac Newton used to show that Revelation was written early rather than late. Although, Newton comes to a different conclusion.
His evidence is a bit lengthier than given in this article.
http://www.newtonproject.ox.ac.uk/view/texts/normalized/THEM00209
Meant to note that Newton wrote this in 1733. Wasn’t that a year after George Washington was born?