Initial premise is that certain artifacts marked with Greek letters appeared to be 500 years too old for such writing.
Because of the devotion to the conventional pseudochronology, discoveries which undermine it have to be ignored, or have abuse heaped on them, or result in an outlandish adjustment of some kind. Very rarely does it result in radical chronological adjustments (although that does happen, in the example of the reduction by centuries of the date for Hammurabi).
http://www.freerepublic.com/focus/f-chat/1406892/posts?page=6#6
http://www.freerepublic.com/focus/f-chat/1406892/posts?page=7#7