The statement "This ... conclusion seems to indicate that the research conducted by Barsoum and Ganguly is not sufficient to confirm Mr. Davidovits' hypothesis" is logically and legally correct, but it doesn't help anyone here to understand the discussion and scientific findings by SEM analysis.

Because Davidovits sees all or most of the limestone blocks of the GP as artificial, and I agree with that, while Barsoum has limited his results to only the few outer layers, smooth casing stones and I guess 2-5 blocks beyond. Barsoum clearly states in this finding "crucial parts of the Great Pyramids are indeed made of reconstituted limestone". Those crucial parts are the outer layers.